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Electronic Power Steering

1. Summer 2012 Volume 5 Issue 2 P c News INFINITI SHIFT the way you move Speed Up Your Cycle Time Not Your Re Cycle Time TRUST THE ORIGINAL GENUINE NISSAN PARTS Cheap aftermarket parts are expensive Every time you re fit re sand or re finish an ill fitting part it s costing you money In order to maximize profits you need to maximize the use of every available hour of labor Dont settle for anything less than Nissan Original Equipment replacement parts They provide the same fit and finish as the original part potentially speeding up repair cycle time Ultimately providing a higher level of customer satisfaction and profit to your bottom line eve collisionlink Your Rewards Ready Nissan and Advantage Awards offer you the most comprehensive online reward catalog available in the repair industry Parts Reward Points are issued to enrolled Highly accurate a 7 locate halas repair shops on qualifying and mounting Genuine Parts purchases from OEM parts dies points YR provide a precise participating Nissan and fit for every panel Infiniti dealers Factory surface treatment and bonded primer Limited Lifetime Corrosion Warranty To enroll your shop visit nissanpartsrewards com NISSAN GENUINE ot infinitipartsrewards com REPLACEMENT FENDER Outer sheet metal panels are warranted as lang as your customer owns our vehicie Nissan amp Infinit
2. SCHENECTADY LIA NISSAN 518 370 2121 SEAFORD MASSAPEQUA NISSAN 631 842 5320 STATEN ISLAND S G HYLAN MOTORS CORP 718 447 3800 SYOSSET LEGEND NISSAN LTD 516 496 7385 WEST ISLIP ATLANTIC NISSAN SUPERSTOR 631 587 2766 WESTBURY ADVANTAGE NISSAN 516 935 1813 WHITE PLAINS PEPE INFINITI INC 800 344 7660 YONKERS CENTRAL AVENUE NISSAN 914 961 3900 YORKTOWN HEIGHTS CURRY NISSAN 914 737 3500 NORTH CAROLINA CARY LEITH NISSAN 919 589 0029 CHARLOTTE EAST CHARLOTTE NISSAN 704 535 4012 CHARLOTTE SOUTH CHARLOTTE NISSAN 104 552 9191 CORNELIUS LAKE NORMAN INFINITI 704 237 5100 CORNELIUS MODERN NISSAN LAKE NORMAN 704 237 8008 DURHAM MICHAEL JORDAN NISSAN 919 489 3800 GREENSBORO CROWN NISSAN 866 525 9859 GREENSBORO MODERN INFINITI LLC 888 232 4118 HICKORY CROSSROADS NISSAN 828 324 5040 MATTHEWS INFINITI OF CHARLOTTE 704 815 1018 RALEIGH CROSSROADS INFINITI ING 919 981 5656 RALEIGH SOUTHERN STATES NISSAN 888 998 0044 SANFORD CROSSROADS NISSAN 877 399 4830 STATESVILLE CLASSIC NISSAN 704 872 8500 WAKE FOREST CROSSROADS NISSAN 919 435 5740 WILMINGTON CAPITAL NISSAN 910 392 4300 WINSTON SALEM MODERN INF WINSTON SALEM 888 232 4118 WINSTON SALEM MODERN NISSAN LLC 336 744 2142 OHIO AKRON FRED MARTIN NISSAN 330 644 8888 BEDFORD INFINITI OF BEDFORD 440 359 1453 CHILLICOTHE NOURSE NISSAN 740 773 7913 CINCINNATI INFINITI OF CINCINNATI 513 583 1200
3. that once opened and closed valves and directly controlled shifting has been replaced with externally controlled solenoid valves The decision making is now done outside the trans mission case as well Mechanical hydraulic systems are not capable of the same level of intelligent thinking as an electronic control module and intelli gent shitting choices are necessary to increase effi ciency performance and drivability Shift timing and clutch application can now be perfectly matched to driving conditions The torque converter clutch can be locked in any gear or even partially locked with duty cycle control The control unit is even able to recog nize driving situations such as a grade and provide engine braking or prevent overdrive hunting as appro priate Programming a pure mechanical hydraulic system for this level of control would be nearly impos sible and even if it were the added weight would be unacceptable Thus the modern transmission has become mostly output There are a few sensors and there is still some direct mechanical hydraulic control but most of the transmission s function is actuation to put commands into action not to evaluate or make decisions Changing gear ratio requires input logic and output Only one third of this system lives within the transmis sion housing Therefore the odds of accurate diagno sis by test drive or replace based on symptom are lower than ever before This is why
4. DUBLIN INFINITI OF COLUMBUS LLC 614 793 2481 HILLIARD BUCKEYE NISSAN INC 614 771 2370 MASSILLON WAIKEM NISSAN 800 274 0157 MAYFIELD HEIGHTS GANLEY NISSAN 440 449 9500 MEDINA KEN GANLEY NISSAN INC 330 721 0509 MIDDLEBURG HTS NISSAN OF MIDDLEBURG HTS 440 884 7800 STREETSBORO CLASSIC NISSAN 330 422 7300 TOLEDO YARK NISSAN 419 842 7532 OKLAHOMA BROKEN ARROW NELSON NISSAN 877 910 4646 OKLAHOMA CITY BOB HOWARD NISSAN INC 405 943 9555 OKLAHOMA CITY BOB MOORE INFINITI INC 405 748 6086 OKLAHOMA CITY HUDIBURG NISSAN L L C 405 632 0715 TULSA BOB MOORE NISSAN OF TULSA 918 628 1495 TULSA JACKIE COOPER NISSAN 888 211 6202 OREGON EUGENE LITHIA NISSAN OF EUGENE 541 686 2218 GLADSTONE GLADSTONE NISSAN 503 723 2070 MEDFORD LITHIA NISSAN 541 774 8416 PORTLAND BEAVERTON INFINITI 503 526 5302 TROUTDALE NISSAN OF GRESHAM 503 405 9520 PENNSYLVANIA ARDMORE INFINITI OF ARDMORE 610 896 4400 ALLENTOWN ROTHROCK MOTOR SALES INC 484 223 0596 BEAVER FALLS BEAVER COUNTY NISSAN 724 847 4800 CONCORDVILLE CONCORDVILLE NISSAN 610 459 9135 CONSHOHOCKEN CONICELLI NISSAN 800 845 0999 DOYLESTOWN FRED BEANS NISSAN DOYLEST 888 842 8829 ERIE PORRECO NISSAN INC 814 860 8377 EXTON EXTON NISSAN 610 594 7400 FAIRLESS HILLS PERUZZI NISSAN 215 949 6970 FEASTERVILLE COLONIAL NISSAN INC 215 364 1800 JENKINTOWN FAULKNER NISSAN 215 887 7940 MECHANICSBURG BRENNER NIS
5. INFINITI OF SPRINGFIELD 417 616 5581 MONTANA BILLINGS BILLINGS NISSAN LLC 406 294 1259 MISSOULA MISSOULA NISSAN HYUNDAI 406 721 1100 NEBRASKA ELKHORN INFINITI OF OMAHA 402 493 1945 OMAHA NISSAN OF OMAHA LLC 402 592 2200 NEVADA HENDERSON HENDERSON NISSAN 702 558 5974 LAS VEGAS DESERT NISSAN 702 262 0540 LAS VEGAS PARK PLACE INFINITI 702 252 8800 LAS VEGAS PLANET NISSAN 702 839 6138 LAS VEGAS UNITED NISSAN 702 207 8032 NEW HAMPSHIRE MANCHESTER TEAM NISSAN INC 603 634 4442 NASHUA INFINITI OF NASHUA 603 888 2446 NASHUA PETER S AUTO SALES INC 603 579 5205 PORTSMOUTH PORT CITY NISSAN 603 431 6500 NEW JERSEY AVENEL SANSONE S ROUTE 1 NISSAN 732 815 2525 BLOOMFIELD LYNNES NISSAN CITY INC 973 743 8387 BUTLER ROUTE 23 NISSAN LLC 888 393 4861 CHERRY HILL CHERRY HILL NISSAN INC 856 667 8010 CLIFTON FETTE INFINITI LLC 973 743 3100 ENGLEWOOD INFINITI OF ENGLEWOOD LLC 800 969 2204 FLEMINGTON FLEMINGTON INFINITI 800 218 1437 FLEMINGTON FLEMINGTON NISSAN 800 381 9113 FREEHOLD DCH FREEHOLD NISSAN 732 780 4660 HAINESPORT CLASSIC CARS NISSAN 609 267 2886 HASBROUCK HEIGHTS MEADOWLANDS NISSAN 888 935 7799 KEYPORT PINE BELT NISSAN KEYPORT 732 264 4364 MAPLE SHADE HOLMAN INFINITI 800 523 0285 NEPTUNE SANSONE JR S 66 NISSAN 800 274 7121 JERSEY CITY HUDSON NISSAN 201 435 2003 NORTH PLAINFIELD NORTH PLAINFIELD NISSAN 800 311 4663 SOMER
6. MESA 480 655 4060 PEORIA INFINITI OF PEORIA 623 583 5701 PEORIA PEORIA NISSAN 623 523 6250 PHOENIX ABC NISSAN 602 264 3666 PHOENIX MIDWAY NISSAN 602 866 6650 SCOTTSDALE INFINITI OF SCOTTSDALE 480 424 3211 SCOTTSDALE PINNACLE NISSAN 480 368 4050 TEMPE POWER NISSAN TEMPE 480 598 6111 TUCSON INFINITI OF TUCSON 520 690 1500 TUCSON JIM CLICK NISSAN 520 884 4130 TUCSON THOROUGHBRED NISSAN 520 618 6500 ARKANSAS FORT SMITH SMITH NISSAN 479 648 1900 NORTH LITTLE ROCK NORTH LITTLE ROCK NISSAN 501 604 3955 CALIFORNIA ALHAMBRA ALHAMBRA NISSAN 626 289 7802 ANTIOCH ANTIOCH NISSAN 925 281 5050 BAKERSFIELD NISSAN OF BAKERSFIELD 661 396 4035 BAKERSFIELD INFINITI OF BAKERSFIELD 661 617 2020 BUENA PARK BUENA PARK NISSAN 714 739 0800 BURLINGAME NISSAN OF BURLINGAME 650 347 4800 CARSON CARSON NISSAN 310 221 5121 CATHEDRAL CITY PALM SPRINGS NISSAN 760 328 2828 CERRITOS CERRITOS INFINITI 562 405 3535 CERRITOS CERRITOS NISSAN 800 396 7278 CHICO CHICO NISSAN INC 530 891 0202 CITY OF INDUSTRY PUENTE HILLS NISSAN 626 626 2600 CLOVIS NISSAN OF CLOVIS 559 297 6919 COLMA SERRAMONTE NISSAN 650 488 2870 CONCORD DIRITO BROS CONCORD NISSAN 888 899 4173 CONCORD NIELLO INFINITI 925 676 9592 CORONA CORONA NISSAN 800 553 7438 COSTA MESA CONNELL NISSAN 714 444 4220 DOWNEY DOWNEY NISSAN 888 444 1355 DUARTE PERFORMANCE NISSAN 866 540 6959 DUBLIN
7. OF SANTA ROSA 107 545 4500 SELMA SELMA NISSAN 559 891 2896 SIMI VALLEY FIRST NISSAN 805 526 5007 THOUSAND OAKS NISSAN OF THOUSAND OAKS 888 705 4441 TORRANCE INFINITI SOUTH BAY 310 517 0570 TUSTIN INFINITI TUSTIN 714 832 6252 TUSTIN TUSTIN NISSAN 714 669 8282 VALENCIA NISSAN OF VALENCIA 866 751 0234 VAN NUYS MILLER NISSAN INC 818 374 4493 VICTORVILLE VALLEY HI NISSAN 888 293 7762 VISALIA NISSAN OF VISALIA 559 741 2274 WEST COVINA WEST COVINA NISSAN 626 388 9300 WESTMINISTER ORANGE COAST INFINITI 714 650 8585 WESTLAKE VILLAGE INFINITI OF THOUSAND OAKS 805 230 8262 WOODLAND HILLS WOODLAND HILLS NISSAN 818 577 2778 COLORADO AURORA INFINITI OF DENVER 303 671 2596 AURORA TYNAN S NISSAN INC 303 341 3214 CENTENNIAL GO NISSAN ARAPAHOE 303 790 7333 COLORADO SPRINGS SOUTH COLO SPGS NISSAN 719 550 3041 COLORADO SPRINGS WOODMEN NISSAN 719 234 1060 DENVER GO NISSAN 104TH 303 738 4330 ENGLEWOOD LARRY H MILLER NISSAN 720 274 5243 GREELEY EHRLICH NISSAN 970 353 2065 HIGHLANDS RANCH MIKE WARD INFINITI 303 350 4300 LAKEWOOD EMPIRE LAKEWOOD NISSAN 303 232 3009 LITTLETON GO NISSAN SOUTHWEST 303 738 4330 CONNECTICUT HARTFORD HARTE INFINITI ING 877 791 7276 HARTFORD HARTE NISSAN INC 860 541 6942 MANCHESTER DECORMIER MOTOR SALES INC 201 758 1756 MIDDLEBURY COUNTY LINE NISSAN 203 758 1756 MIDDLETOWN MIDDLETOWN NISSAN LLC 860 632 6400 MILFOR
8. STONE MOUNTAIN NISSAN 678 252 3111 MACON PAUL WALSH NISSAN INC 478 784 1991 MARIETTA TEAM NISSAN OF MARIETTA 770 421 8639 MORROW NISSAN SOUTH 770 968 1360 ROME HERITAGE NISSAN 706 295 0525 ROSWELL REGAL NISSAN INC 770 998 8686 UNION CITY INFINITI OF SOUTH ATLANTA 678 369 6074 UNION CITY NISSAN SOUTH UNION CITY 770 306 9817 HAWAII HONOLULU INFINITI OF HONOLULU 888 836 7753 HONOLULU NEW CITY NISSAN 808 545 3111 LIHUE NISSAN OF KAUAI 808 245 0525 WAIPAHU TONY NISSAN 808 680 7140 IDAHO POST FALLS FINDLAY NISSAN 208 618 5005 ILLINOIS ARLINGTON HEIGHTS ARLINGTON NISSAN ARLINGTN 847 590 0154 BARRINGTON MOTOR WERKS INFINITI INC 888 568 3140 CENTRALIA MONKEN NISSAN 618 545 5100 CHICAGO BERMAN S INFINITI CHICAGO 312 476 8000 CHICAGO MID CITY NISSAN INC 888 635 5652 CHICAGO WESTERN AVENUE NISSAN 773 776 8200 COUNTRYSIDE CONTINENTAL MOTORS INC 708 354 3745 CRYSTAL LAKE JIM M LADY NISSAN 815 459 2296 ELGIN MCGRATH NISSAN 847 888 2030 GLENCOE FIELDS INFINITI 847 998 5200 GURNEE N ROSEN NISSAN OF GURNEE 847 856 0644 LISLE INFINITI OF LISLE ING 866 874 6346 MATTESON HAWKINSON NISSAN LLC 708 720 2185 MELROSE PARK AL PIEMONTE NISSAN INC 708 343 6669 NILES STAR NISSAN INC 800 421 1947 NORTH AURORA GERALD NISSAN OF N AURORA 630 907 0867 O FALLON AUFFENBERG NISSAN 618 622 4646 OAK LAWN KELLY NISSAN INC 708 425 6659 ORLAND PARK I
9. generating fluid pressure even when the steering wheel is in the straight ahead position simply because it s attached to the crank and it must be available when requested EPS is smart enough to know if the driver is turning the wheel and can determine how much assist is needed Most driving is going straight ahead so it is a logical improvement for efficiency to only use engine power as consumed by the alternator when necessary EPS also requires fewer individual components reducing the costs of manufacturing and mainte nance Some technicians may groan at the loss of broken things to fix but EPS still relies on sensor I CAN I communi ication I Sensor signal ABS actuator and electric unit control unit EPS control Combination meter EPS warning lamp Nissan amp Infiniti Tech News 27 Nissan amp Infiniti Electronic Power Assist EPS motor angle sensor Torque sensor Combination meter HV ECU EA lamp Rack mounted EPS design input and control modules all of which may need diagnosis and repair On the bright side cars will be less messy to work on without power steering fluid leaks Modern vehicles are shifting the role of the technician toward computer system diagnosis EPS just confirms the transition Different EPS Designs Let s explore the three different ways that Nissan implements EPS in its vehicles Most com mon is the steerin
10. is often the preferred and recommended joining method rather than welding or riveting Professionals must ensure they are up to date with the latest service and repair information invest in the required tooling and seek effective training to learn and assimilate modern bonding related repairs Keeping competencies current is not only the difference between a cosmetic versus a complete repair it s also driving opportunity to properly prepared collision facilities Bonding is the New Normal Bonding with adhesives is a more complicated process than in the past No longer is it a matter of just slathering on some glue and clamping the parts together While structural adhesives have been used for more than 25 years in the automobile industry early adhesives were predominantly single component vari eties which at that time were sufficient for some repairs involving conventional mild strength steels The transition to repairing newer materials necessitat ed a shift to two component a resin and a catalyst adhesive formulations that provided improved bonding properties and allowed more working time during repair When combined during a repair the catalyst initiates a chemical reaction in the resin Expect to feel the bonded parts heating up as the resin develops its bonding properties as the mixture cures Note that the curing ability that is built into an adhesive can vary from minutes to days which affects a technician s working ti
11. the electric parking brake in the rear wheels not the parking gear in the reducer and has nothing to do with shift selection The LEAF cannot be shifted while in OFF or ACC modes The LEAF utilizes standard CV axles so periodic inspection and repair of the boots as necessary will ensure long axle life Brake and Steering Systems The basics of the LEAF s brakes are what you already know and understand from most other vehi cles disc brakes using hydraulic caliper pistons However Nissan introduces an electronically driven Intelligent Brake Unit IBU that integrates the brake control mod ule with the master cylinder and an electronic brake booster Because the VCM can switch the role of the traction motor into a generator when not accelerat ing the LEAF must account for this behavior in braking When you try to separate two magnets it requires effort the same force also occurs during the induction process within the electric motor effectively slowing the vehicle down This is called regenerative braking and it can be used coop eratively with the friction brakes to stop the car The VCM can measure the exact stopping GX The RE1F61A reduction gear input gear has 17 teeth connected to a 31 tooth main gear which outputs through another 17 tooth gear to the large 74 tooth final drive gear The final gear ratio is 7 937 In this diagram A indicates the power input direction and B indicates the po
12. thorough transmis sion diagnosis is critical even if your shop usually replaces rather than repairs Easy as 1 2 3 The fundamentals of transmission diagnosis are much the same as the fundamentals of diagnosing any computer controlled system Just answer the following questions 1 How was the system designed to work Computer control is all about logic if this then that Find out what the transmission should be doing then see if it is doing it 2 What are the relevant sensor inputs and do they match actual conditions If not why 3 What are the outputs and do the output commands match the actual output If not why Research is the first step but in order to research efficiently you must have a direction to pursue an idea of where to focus the enguiry So without spending too much time carefully read the symptom description on the repair order test drive the car and check for trouble codes However it s important not to get sucked into trying to perform diagnosis before understanding how the system should work so as soon as you ve found a direction leave the car and head for your laptop There are several very useful areas in the service manual If you have a trouble code DTC to work with the section that covers On Board Diagnosis Logic is extremely useful It s possible to get inside the mind of the TCM and know what it s going to do or at least what it should do If you know how the TCM is t
13. 48 LEAGUE CITY CLEAR LAKE NISSAN 281 557 5450 LONGVIEW PATTERSON NISSAN LONGVIEW 903 758 4135 MCALLEN BERT OGDEN NISSAN 956 631 6666 MCKINNEY NISSAN OF MCKINNEY 214 544 4900 MESQUITE TROPHY NISSAN 866 831 2622 PLANO CREST INFINITI 972 516 2314 RICHARDSON COURTESY NISSAN 972 644 3942 ROUND ROCK ROUND ROCK NISSAN 512 244 8525 SAN ANTONIO ANCIRA NISSAN INC 800 508 1117 SAN ANTONIO GUNN INFINITI LTD 210 824 6152 SAN ANTONIO GUNN NISSAN LTD 210 494 4760 SAN ANTONIO INGRAM PARK NISSAN 210 681 6017 TEXARKANA PETE MANKINS 903 793 5661 TOMBALL FRED HAAS NISSAN 281 516 6700 TYLER PELTIER NISSAN 903 534 8934 WEATHERFORD SOUTHWEST NISSAN 817 565 1170 UTAH MURRAY TIM DAHLE INFINITI 800 848 4070 MURRAY TIM DAHLE NISSAN 801 269 6420 RIVERDALE KEN GARFF NISSAN RIVERDAL 801 627 6762 SALT LAKE CITY KEN GARFF NISSAN OF SALT LAKE 800 888 1926 VERMONT SOUTH BURLINGTON FREEDOM NISSAN INC 802 846 0210 VIRGINIA ALEXANDRIA PASSPORT INFINITI ALEXAND 703 461 1500 CHANTILLY INFINITI OF CHANTILLY 703 322 3629 CHANTILLY NISSAN OF CHANTILLY 800 724 9350 CHARLOTTESVILLE COLONIAL NISSAN PONT CAD 434 951 1062 CHESAPEAKE HALL NISSAN CHESAPEAKE 866 401 8332 CHESAPEAKE NISSAN OF CHESAPEAKE 800 558 9924 CHESTER PRIORITY NISSAN RICHMOND 804 518 1888 CHRISTIANSBURG NEW RIVER NISSAN INC 540 382 9697 FALLS CHURCH KOONS NISSAN 703 241 1000 FOREST LYNCHBURG
14. 7778 GALLATIN NEWTON NISSAN 615 451 6827 JACKSON CARLOCK NISSAN OF JACKSON 800 200 3997 JOHNSON CITY TRI CITIES NISSAN INC 423 952 1920 KNOXVILLE HARPER INFINITI INC 877 870 8052 MEMPHIS DOBBS NISSAN 901 759 6100 MEMPHIS JIM KERAS NISSAN INC 901 373 2800 MURFREESBORO NISSAN OF MURFREESBORO 615 893 0252 NASHVILLE DOWNTOWN NASHVILLE NISSAN 615 248 5110 SHELBYVILLE VICTORY NISSAN SOUTH 931 488 3286 TEXAS ARLINGTON DON DAVIS NISSAN INC 817 588 5510 AUSTIN AUSTIN INFINITI INC 512 454 6338 AUSTIN SOUTH POINT NISSAN 512 444 4962 AUSTIN TOWN NORTH NISSAN 800 251 7278 BEDFORD GRUBBS NISSAN 817 268 8930 CONROE STREATER SMITH NISSAN 936 523 2142 CORINTH ORR NISSAN OF CORINTH 866 360 4763 CORPUS CHRISTI ED HICKS NISSAN LTD 361 654 8561 DALLAS CLAY COOLEY NISSAN 972 709 2000 EL PASO CASA NISSAN INC 915 779 3261 EL PASO HOY FOX INFINITI 915 772 3256 EULESS GRUBBS INFINITI LTD 817 359 4114 FORT WORTH NISSAN OF FORT WORTH 817 696 4886 GRAPEVINE TEXAS NISSAN OF GRAPEVINE 817 601 3563 HOUSTON BAKER NISSAN NORTH 281 890 5656 HOUSTON BAKER NISSAN SOUTH 713 349 6174 HOUSTON CLEAR LAKE INFINITI 713 589 4013 HOUSTON MCDAVID NISSAN 713 941 0400 HOUSTON MOSSY NISSAN 281 589 5309 HOUSTON SOUTHWEST INFINITI 713 981 5812 HOUSTON TOM PEACOCK NISSAN 832 626 1425 HUMBLE ROBBINS NISSAN 281 446 3181 IRVING BANKSTON NISSAN OF IRVING 972 438 48
15. A C compressor uses high voltage input to power a three phase motor in an identical manner to that of the main traction motor The driver can determine his or her desired level of cooling and the A C Auto Amp will elec tronically control the A C compressor speed to generate the target output temperature Because the compressor can be controlled independently of motor speed the system is inherently more efficient than a belt driven unit on a conventional car As the compressor draws power trom the high voltage battery it will decrease the overall range of the LEAF and should be taken into account when discussing the Battery Usage Report ECO mode will automatically decrease the power available to the A C compressor An alternator is simulated by using an onboard DC to DC charger which lives in the DC DC junction box The mmm mmm mm mm mmm mm mmm mmm mm mm mmm s m m mm mmm mam mm mmm mm mo lee This flow chart describes the logic behind the LEAF s cooperative braking technology p Control signal flow Hydraulic pressure Braking force o Target hydraulic braking force e2 Reguired braking force Regenerative braking force effective value Nissan amp Infiniti Tech News 11 Nissan amp Infiniti The Nissan LEAF high voltage battery pack will automatically supply power to charge the on board 12V battery as necessary When t
16. BOWIE 301 867 6150 CLARKSVILLE ANTWERPEN NISSAN INC 866 226 4930 COLLEGE PARK DARCARS NISSAN 301 441 8000 ELLICOTT CITY NORRIS NISSAN WEST 443 549 1260 FREDERICK FREDERICK NISSAN 301 662 4800 GERMANTOWN CRISWELL NISSAN 301 670 3900 GLEN BURNIE SHEEHY NISSAN 877 478 3539 LAUREL TISCHER NISSAN 800 288 6983 MARLOW HEIGHTS PASSPORT NIS MARLOW HEIGHTS 301 423 8400 ROCKVILLE DARCARS NISSAN 301 309 2200 SALISBURY POHANKA NISSAN SALISBURY 410 548 4704 SILVER SPRING HERB GORDON NISSAN 301 890 3055 Nissan amp Infiniti Tech News 33 TIMONIUM NATIONWIDE MOTOR SLS CORP 410 252 5834 WALDORF SHEEHY NISSAN OF WALDORF 301 843 5300 MASSACHUSETTS AUBURN BERTERA NISSAN INC 508 832 9611 BEVERLY ROLAND D KELLY NISSAN 978 767 4816 BROCKTAN NISSAN 24 508 513 1869 BOURNE NISSAN OF BOURNE 508 759 4400 DANVERS KELLY INFINITI 866 883 7093 HYANNIS BALISE NISSAN OF CAPE COD 508 771 3636 KINGSTON SULLIVAN BROTHERS NISSAN 781 585 7500 LANCASTER RON BOUCHARD S NISSAN 978 345 1800 LYNNFIELD KELLY NISSAN OF LYNNFIELD 866 979 4250 MEDFORD COLONIAL NISSAN 781 395 5300 MILFORD MILFORD NISSAN 508 422 2800 NORTH ATTLEBORO NISSAN VILLAGE 888 309 0980 NORWOOD INFINITI AUTO OF NORWOOD 888 340 4442 RAYNHAM MASTRIA NISSAN INC 800 248 2458 TEWKSBURY IRA NISSAN TEWKSBURY 978 746 2500 WEST SPRINGFIELD JERRY ROME NISSAN 413 746 2269 MICHIGAN FARMINGTON HILLS SU
17. BURBAN NISSAN FARM HILL 800 242 8425 GRAND RAPIDS PFEIFFER INFINITI INC 616 940 8992 KALAMAZOO COLE NISSAN 269 342 9800 KENTWOOD FOX NISSAN GRAND RAPIDS 616 719 5750 NOVI SUBURBAN INFINITI INC 800 242 8425 OKEMOS LANSING NISSAN 517 827 0273 TRAVERSE CITY TRAVERSE CITY AUTO PLAZA 800 852 6475 TROY SUBURBAN INFINITI OF TROY 248 731 3400 TROY SUBURBAN NISSAN OF TROY 248 649 2074 MINNESOTA BLOOMINGTON FELDMANN IMPORTS INC 952 837 6350 BLOOMINGTON LUTHER INF OF BLOOMINGTON 952 885 7050 34 Nissan amp Infiniti Tech News BROOKLYN PARK BROOKLYN PARK AUTOMOTIVE 763 765 1562 BURNSVILLE WALSER NISSAN 952 898 7306 GOLDEN VALLEY JIM LUPIENT INFINITI 763 513 4715 INVER GROVE HEIGHTS LUTHER NISSAN 800 246 9984 MAPLEWOOD KLINE NISSAN 651 379 4325 MISSISSIPPI BRANDON GRAY DANIELS NISSAN BRAND 800 530 7989 GULFPORT PAT PECK NISSAN 228 864 6411 HATTIESBURG PETRO NISSAN 601 264 4411 JACKSON GRAY DANIELS NISSAN NORTH 601 899 7450 TUPELO CARLOCK NISSAN OF TUPELO 800 808 6481 MISSOURI COLUMBIA JOE MACHENS NISSAN 573 443 1660 CREVE COEUR PLAZA INFINITI 314 301 1702 HAZELWOOD BOMMARITO NISSAN INC 314 731 8270 KANSAS CITY RANDY REED NISSAN LLC 816 459 4800 KANSAS CITY STATE LINE NISSAN 816 942 4007 KANSAS CITY INFINITI OF KANSAS CITY 888 227 5301 SAINT LOUIS LOU FUSZ MOTOR COMPANY 800 392 1372 SAINT LOUIS SUNTRUP NISSAN 314 892 7790 SPRINGFIELD
18. D NAPOLI NISSAN 203 877 5607 NORTH HAVEN EXECUTIVE NISSAN 888 479 5890 SHELTON D ADDARIO NISSAN 800 998 6978 TORRINGTON ALFANO 860 482 5555 WEST SIMSBURY HOFFMAN NISSAN 860 658 3340 WILTON BRUCE BENNETT NISSAN 203 544 8371 DELAWARE NEW CASTLE SHERIDAN NISSAN LLC 302 326 6134 NEWARK PORTER INFINITI 302 368 6305 NEWARK PORTER NISSAN 302 368 6317 FLORIDA CLEARWATER AUTOWAY NISSAN CLEARWATER 727 507 3200 CLEARWATER LOKEY MOTOR COMPANY 727 374 2317 CLEARWATER LOKEY NISSAN 727 450 7989 COCONUT CREEK INFINITI OF COCONUT CREEK 954 861 6117 CORAL SPRINGS CORAL SPRINGS NISSAN INC 954 752 9595 DAYTONA BEACH DAYTONA NISSAN 386 274 6825 DELAND DELAND NISSAN 386 734 3003 FORT LAUDERDALE MAROONE NIS FT LAUDERDALE 954 524 2105 FORT MYERS SUTHERLIN NISSAN 239 267 1359 FORT PIERCE FORT PIERCE NISSAN 772 464 4645 GAINESVILLE GAINESVILLE NISSAN 352 378 2311 JACKSONVILLE ATLANTIC INFINITI INC 800 642 0200 JACKSONVILLE COGGIN NISSAN AT THE AVE 904 886 7330 JACKSONVILLE COGGIN NISSAN 904 642 7900 JACKSONVILLE MIKE SHAD NISSAN JACKSONV 866 668 8933 LAKELAND JENKINS NISSAN INC 863 686 2800 MIAMI BILL SEIDLE S NISSAN INC 305 635 5478 MIAMI ESSERMAN NISSAN LTD 305 625 6320 MIAMI MAROONE NISSAN OF MIAMI 305 444 7868 MIAMI WARREN HENRY INFINITI 305 654 1572 NAPLES JOHN MARAZZI NISSAN 239 659 9000 NEW PORT RICHEY FERMAN NISSAN 727 847 5555 ORLAND
19. DUBLIN NISSAN 952 452 8020 EL CAJON MOSSY NISSAN EL CAJON 619 401 2068 EL MONTE ROSS NISSAN OF EL MONTE 800 411 0554 ELK GROVE INFINITI OF ELK GROVE 916 405 7005 ELK GROVE NISSAN OF ELK GROVE 916 405 5010 ESCONDIDO PERRY INFINITI 760 796 5500 ESCONDIDO MOSSY NISSAN ESCONDIDO 760 746 5050 32 Nissan amp Infiniti Tech News FAIRFIELD MOMENTUM NISSAN 107 402 3200 FREMONT PREMIER NISSAN OF FREMONT 510 668 8700 FONTANA FONTANA NISSAN 909 350 8404 FRESNO LITHIA NISSAN OF FRESNO 559 435 3500 GARDENA GARDENA NISSAN INC 310 527 9215 GARDEN GROVE OC NISSAN GARDEN GROVE 714 537 0900 GLENDALE GLENDALE INFINITI 818 547 0520 GLENDALE GLENDALE NISSAN 818 547 5550 GOLETA SANTA BARBARA NISSAN LLC 805 964 2990 HAWTHORNE POWER NISSAN OF SOUTH BAY 310 536 4000 HUNTINGTON BEACH SURF CITY NISSAN 714 500 6040 IMPERIAL ROGERS amp ROGERS NISSAN 760 352 2900 IRVINE OC NISSAN IRVINE 800 515 4797 LA QUINTA TORRE NISSAN 760 777 8999 LOS ANGELES NISSAN OF DOWNTOWN L A 888 576 4560 LOS ANGELES UNIVERSAL CITY NISSAN INC 818 980 0655 MISSION HILLS NISSAN OF MISSION HILLS 818 408 5870 MISSION VIEJO INFINITI OF MISSION VIEJO 949 916 4224 MODESTO CENTRAL VALLEY NISSAN INC 209 526 9736 MONROVIA METRO INFINITI 800 600 4493 MONTCLAIR INFINITI OF MONTCLAIR 909 621 0391 NAPA NAPA NISSAN INC 707 253 1783 NATIONAL CITY MOSSY NISSAN NATIONAL CITY 619 263 7251 OAKLA
20. Introducing the Nissan eStore Ordering OE parts has never been easier Genuine Nissan OE replacement parts always deliver model specific engineering perfect fit and like new performance And now they re just a click away with the all new Nissan eStore Easy to use OE Parts Catalog Full VIN Decoding Parts Illustrations for Most Nissan Vehicles Order Online 24 7 Fast Delivery from your Local Nissan Dealer Trust the Original Genuine Nissan Parts parts NissanUSA com Here s How it Works AAF irch W ee it ue u S a 5 4 4 e v KA 11 ES Enter your vehicle model and year Select the specific category for the part you need This is also a great time to identify other possible components you may need to properly complete the job Choose your specific parts required Add these parts to your shopping cart Find a bocal Nissen Dealer Zip Panne Sept 8 Dp Gp I ENS EIL Tu yT ET EC UR Que TI eR G2 4 Set If you are new customer enter your Zip code to see the closest dealers to you Choose a dealer submit your account information then the dealer will set custom pricing for your shop and e mail you a confirmation s a returning customer you ll be able to immediately access your dealer specific webpage and custom pricing A CP TY un reram Ed te sapit mite sterio mme wap sid Lnr Y eae ou DA La jr RT TE Q SIN Dk SJ Te RER a V
21. ND NISSAN OF OAKLAND 510 588 2200 ONTARIO EMPIRE NISSAN INC 800 994 8881 ORANGE STADIUM NISSAN 714 633 4264 OXNARD TEAM INFINITI 805 288 5155 OXNARD SIGNAL HILL TEAM NISSAN HOOMAN NISSAN LONG BEACH 805 485 2910 800 973 3689 PALMDALE SUNNYVALE ANTELOPE VALLEY NISSAN NISSAN SUNNYVALE 661 274 9556 408 470 4150 PETALUMA TEMECULA NORTH BAY NISSAN INC QUALITY NISSAN TEMECULA 800 788 0772 951 587 3712 REDLA NDS METRO NISSAN OF REDLANDS 888 505 9211 REDWOOD CITY BOARDWALK NISSAN 650 364 0100 REDWOOD CITY PENINSULA INFINITI LLC 650 569 4228 RICHMOND HANLEES HILLTOP NISSAN 510 222 4900 RIVERSIDE INFINITI OF RIVERSIDE 951 324 8282 RIVERSIDE RIVERSIDE NISSAN 951 688 9420 ROSEVILLE FUTURE NISSAN INC 916 677 5251 ROSEVILLE SACRAMENTO INFINITI INC 916 782 2253 SACRAMENTO MAITA S NISSAN SACRAMENTO 916 488 5400 SAN BERNARDINO NISSAN OF SAN BERNARDINO 877 331 3647 SAN DIEGO KEARNY MESA INFINITI 858 573 1755 SAN DIEGO MOSSY NISSAN KEARNY MESA 858 565 4411 SAN DIEGO PACIFIC NISSAN 800 365 6429 SAN JOSE BESHOFF INFINITI 408 531 3030 SAN LEANDRO SAN LEANDRO NISSAN 510 347 3003 SAN LUIS OBISPO COAST NISSAN 805 786 2928 SANTA CLARA FRONTIER INFINITI 408 243 4355 SANTA CLARA STEVENS CREEK NISSAN 408 557 5549 SANTA CRUZ SANTA CRUZ NISSAN 831 426 5100 SANTA MARIA SANTA MARIA NISSAN 805 925 0077 SANTA MONICA SANTA MONICA INFINITI 310 828 4424 SANTA ROSA NISSAN
22. NFINITI OF ORLAND PARK 708 343 3800 PEORIA UFTRING NISSAN INC 309 690 6230 SAINT CHARLES NISSAN OF SAINT CHARLES 630 584 3900 SKOKIE MARTIN NISSAN 847 967 2299 SOUTH HOLLAND NISSAN OF SOUTH HOLLAND 800 696 4772 ST CHARLES NISSAN OF ST CHARLES 630 584 2489 INDIANA FISHERS BUTLER NISSAN 866 237 0569 INDIANAPOLIS ANDY MOHR NISSAN INC 317 298 2015 INDIANAPOLIS DREYER amp REINBOLD INFINITI 317 573 4291 INDIANAPOLIS ED MARTIN NISSAN 800 731 0228 INDIANAPOLIS HUBLER NISSAN INC 800 960 9811 INDIANAPOLIS TOM WOOD NISSAN INC 317 688 6222 IOWA DES MOINES WILLIS INFINITI 800 373 1836 DES MOINES HUMMEL S NISSAN 515 251 8115 KANSAS MERRIAM SUPERIOR NISSAN 913 722 5195 OLATHE MCCARTHY OLATHE NISSAN 913 232 2624 WICHITA DAVIS MOORE NISSAN 316 618 2000 KENTUCKY LEXINGTON GLENN NISSAN 859 263 5020 LOUISVILLE SAM SWOPE INFINITI 877 333 3410 LOUISIANA BATON ROUGE ALL STAR NISSAN LLC 225 272 9330 BATON ROUGE INFINITI OF BATON ROUGE 225 156 6199 HARVEY RAY BRANDT NISSAN INC 504 363 1918 METAIRIE PREMIER NISSAN METAIRIE 504 455 5880 METAIRIE RAY BRANDT INF METAIRIE 504 832 2005 MAINE SOUTH PORTLAND BERLIN CITY NISSAN 207 774 1429 MARYLAND ANNAPOLIS SHEEHY INFINITI ANNAPOLIS 888 288 5162 BALTIMORE ANTWERPEN SECURITY NISSAN 410 298 5369 BALTIMORE BOB BELL CHEVROLET NISSAN 410 282 2432 BEL AIR BEL AIR NISSAN 410 879 1133 BOWIE NISSAN OF
23. NISSAN INC 434 385 7733 HAMPTON POMOCO NISSAN OF HAMPTON 757 838 6111 MANASSAS SHEEHY NISSAN OF MANASSAS 703 361 0377 MECHANICSVILLE SHEEHY NISSAN 804 417 1012 MIDLOTHIAN PENCE NISSAN 804 378 3000 NEWPORT NEWS NISSAN OF NEWPORT NEWS 757 369 6600 NORFOLK CHARLES BARKER NISSAN 757 353 4878 RICHMOND PEARSON INFINITI 804 527 0300 RICHMOND SHEEHY NISSAN OF RICHMOND 804 346 4200 ROANOKE FIRST TEAM NISSAN 540 362 4800 SPRINGFIELD SHEEHY NISSAN SPRINGFIELD 703 922 2223 VIENNA INFINITI OF TYSONS CORNER 800 441 1291 VIRGINIA BEACH CHARLES BARKER INFINITI 757 818 9553 VIRGINIA BEACH HALL NISSAN VIRGINIA BEACH 866 930 7644 WOODBRIDGE COWLES NISSAN 866 830 1688 WASHINGTON BELLEVUE NISSAN OF THE EASTSIDE 425 462 9074 EVERETT MAGIC NISSAN OF EVERETT 425 347 5763 FIFE INFINITI TACOMA AT FIFE 253 231 4310 KIRKLAND INFINITI OF KIRKLAND 425 602 7205 OLYMPIA OLYMPIA NISSAN 888 713 0195 RENTON YOUNKER NISSAN 425 251 8107 SPOKANE WENDLE NISSAN 509 468 4047 WISCONSIN GREEN BAY GANDRUD NISSAN 800 242 2844 MADISON ZIMBRICK INFINITI MADISON 608 230 1429 MADISON ZIMBRICK NISSAN 608 241 1122 MILWAUKEE ROSEN NISSAN INC 800 333 0149 Nissan amp Infiniti Tech News 35 Trust the Original Use Genuine Nissan Infiniti Parts WHAT S STOPPING YOU GIVE YOUR CUSTOMERS WHAT THEY WANT Introducing the new Nissan Value Advantage Brake Pad N
24. Nissan is convinced that the future of efficient vehicles will involve EPS and extensive quality control is involved in guarantee ing the satety of steering control systems What Will Happen to the Drive Belt Electronic accessories are gaining momentum and support as vehicle inter system communica tions and processing power improve The ultimate goal is to remove the yoke of pulley driven acces sories trom under the hood Electric A C com pressors EPS and possibly a replacement for the alternator will reduce the energy wasted on accessories freeing up the engine for better performance and economy Stay up to date on new Nissan technology with a subscription to www nissan techinto com for online training materials and new model introductions Nissan amp Infiniti Tech News 31 Nissan amp Infiniti Program Dealers ALABAMA BESSEMER MOORE NISSAN 205 428 6314 BIRMINGHAM SERRA NISSAN 205 856 2544 BIRMINGHAM CROWN NISSAN 205 823 5266 BIRMINGHAM JIM BURKE NISSAN 205 278 5904 DAPHNE CHRIS MYERS NISSAN 251 626 5558 FAYETTEVILLE SUPERIOR NISSAN 479 442 4251 HUNTSVILLE LANDERS MCLARTY NISSAN 256 830 0266 MOBILE PAT PECK NISSAN 251 470 5052 MONTGOMERY JACK INGRAM MOTORS 334 277 5700 ARIZONA AVONDALE AVONDALE NISSAN 888 856 3322 CHANDLER POWER NISSAN CHANDLER 480 461 4358 MESA COULTER INFINITI 877 415 3521 MESA EARNHARDT S NISSAN SUPER 480 324 8880 MESA LARRY H MILLER NISSAN
25. O ORLANDO INFINITI 407 660 0077 ORLANDO REED MOTORS INC 407 297 7333 ORLANDO SUTHERLIN NISSAN OF ORLANDO 407 657 9500 PALATKA BECK NISSAN 386 328 2775 PALMETTO BAY MAROONE NISSAN OF KENDALL 305 259 2658 PALMETTO BAY SOUTH MOTORS INFINITI 305 256 2070 PANAMA CITY JOHN LEE NISSAN 850 785 9561 PEMBROKE PINES MAROONE NISSAN PEMBROKE 954 447 2366 PENSACOLA SANDY SANSING NISSAN INC 850 479 4777 POMPANO BEACH POMPANO NISSAN LLC 954 781 7700 SAINT PETERSBURG CROWN NISSAN 727 527 8411 SARASOTA COAST INFINITI 941 922 5723 SARASOTA GETTEL NISSAN OF SARASOTA 941 923 1411 TALLAHASSEE KRAFT NISSAN 850 576 6171 TAMARAC SAWGRASS INFINITI 954 421 0669 TAMPA AUTOWAY NISSAN OF BRANDON 813 623 1148 TAMPA COURTESY NISSAN OF TAMPA 877 471 7658 TAMPA INFINITI OF TAMPA 888 632 3042 ROYAL PALM BEACH ROYAL PALM NISSAN 888 229 4132 WEST PALM BEACH INFINITI OF PALM BEACHES 888 229 4132 WINTER HAVEN HILL NISSAN INC 561 491 7540 GEORGIA BOGART NISSAN OF ATHENS 706 549 6600 BUFORD SUTHERLIN NISSAN MALL GEORGIA 678 714 1062 CHAMBLEE CAPITOL CITY NISSAN LLC 770 457 4441 CONYERS CONYERS NISSAN 770 929 8432 COLUMBUS HEADQUARTER NISSAN 706 225 8100 DECATUR NALLEY NISSAN 404 292 4774 DULUTH GWINNETT PLACE NISSAN 770 813 6770 DULUTH INFINITI OF GWINNETT 800 249 7301 GAINESVILLE CARRIAGE NISSAN 678 717 0440 KENNESAW TOWN CENTER NISSAN 770 423 7469 LILBURN
26. SAN 717 697 8400 MONTGOMERYVILLE MONTGOMERYVILLE NISSAN 888 430 2929 MOON TOWNSHIP WEST HILLS NISSAN 412 262 1403 MUNCY ALEXANDER NISSAN INC 570 546 4925 PHILADELPHIA CHAPMAN NISSAN LLC 215 492 8900 PITTSBURGH COCHRAN NISSAN SOUTH HILL 412 343 3200 PITTSBURGH PITTSBURGH EAST NISSAN 412 823 0101 PLEASANT HILLS BOWSER NISSAN 888 455 2377 SCRANTON TOM HESSER NISSAN 510 558 2000 STATE COLLEGE NISSAN OF STATE COLLEGE 814 238 2447 WEST CHESTER INFINITI OF WEST CHESTER 484 885 2215 WEXFORD WRIGHT AUTOMOTIVE GROUP 124 935 4646 WILLOW GROVE INFINITI OF WILLOW GROVE 215 784 9320 YORK APPLE NISSAN INC 717 755 9543 RHODE ISLAND EAST PROVIDENCE NISSAN OF EAST PROVIDENCE 401 432 2000 WARWICK BALISE NISSAN 401 780 3790 WARWICK INFINITI OF WARWICK 401 824 2225 WEST WARWICK NISSAN WEST WARWICK 401 824 2364 SOUTH CAROLINA CHARLESTON BAKER INFINITI CHARLESTON 843 852 4029 CHARLESTON MORRIS MOTORS INC 843 571 2810 COLUMBIA DICK SMITH NISSAN 800 922 6218 GREENVILLE CROWN NISSAN GREENVILLE 864 254 7711 GREER NISSAN OF GREER 864 868 6615 HARDEEVILLE INFINITI OF HILTONHEAD 800 501 7408 HARDEEVILLE KEY NISSAN LLC 800 868 6615 TENNESSEE ALCOA TWIN CITY NISSAN 865 970 4132 BARTLETT WOLFCHASE NISSAN 901 255 3880 CHATTANOOGA KELLY INF OF CHATTANOOGA 423 899 8934 CLARKSVILLE HAROLD MATHEWS NISSAN 931 221 4230 FRANKLIN NISSAN OF COOL SPRINGS 877 250
27. VILLE SOMERSET NISSAN 908 722 3600 SOUTH BRUNSWICK ACME NISSAN 800 367 0269 STANHOPE LYNNES NISSAN WEST INC 800 245 9590 TOMS RIVER PINE BELT AUTOMOTIV INC 732 349 6878 TURNERSVILLE NISSAN OF TURNERSVILLE 800 883 0003 WOODBURY WOODBURY NISSAN INC 856 853 8176 NEW MEXICO ALBUQUERQUE GARCIA INFINITI 505 217 3002 ALBUQUERQUE MELLOY NISSAN 505 266 8588 ALBUQUERQUE RELIABLE NISSAN 505 897 6001 NEW YORK ALBANY ARMORY NISSAN INC 518 641 7672 AMHERST MIKE BARNEY NISSAN 716 833 6618 BAYSIDE STAR NISSAN INC 718 359 7454 BLAUVELT ROCKLAND NISSAN 845 358 3670 BROOKLYN BAY RIDGE NISSAN INC 718 238 4776 BROOKLYN KING S NISSAN INC 718 934 3900 BROOKLYN KINGS INFINITI INC 718 646 3335 COHOES LIA INFINITI 518 738 0800 GREAT NECK GREAT NECK NISSAN 516 301 5155 KINGSTON KINGSTON NISSAN 845 338 3100 OZONE PARK NISSAN OF QUEENS 877 259 2886 GREENVALE BARON NISSAN INC 516 621 2299 HUNTINGTON STATION NISSAN OF HUNTINGTON 631 439 7081 JACKSON HEIGHTS KOEPPEL NISSAN INC 718 898 7081 LYNBROOK LEGACY INFINITI LTD 877 569 4634 MANHASSET INFINITI OF MANHASSET 866 382 2266 MOUNT KISKO JIM HARTE NISSAN 914 2423990 NEW YORK INFINITI OF MANHATTAN ING 212 315 0700 PATCHOGUE NISSAN 112 SALES CORP 631 289 9070 PORT CHESTER NISSAN CITY PORT CHESTER 914 937 1777 RIVERHEAD RIVERHEAD AUTO MALL LTD 631 369 0111 SAINT JAMES SMITHTOWN NISSAN INC 631 361 9560
28. ack and pinion The EPS motor is also the pump reservoir and control unit so it is more or less self contained like the steering column mounted EPS The hybrid EPS works just like conventional power steering but with the exception that the pump motor is con trolled identically to the above mentioned EPS designs Based on steering torque and vehicle speed the hybrid EPS control unit determines the necessary amount of fluid pressure and rotates the vanes of the pump in the appropriate direction to provide assist pressure to the correct side of the steering rack In other words it s an on demand power steering pump that only works when the steering wheel is turned Just like con ventional hydraulic systems fluid leaks can devel op plus any EPS component control may require diagnosis and repair EPS Maintenance and Repair The non hybrid EPS designs do not require any periodic maintenance In the event of a malfunction the customer will complain of noises steering feed back sensations vibration pulsation judder etc or the EP indicator on the gauge cluster may illumi nate The CONSULT Ill PLUS is necessary for diag nosis It is possible that low battery voltage can cause loss of important information within the EPS control module If a primary EPS component requires replace ment it will be necessary to adjust the neutral posi tion of the steering angle sensor and or calibrate the steering torque sensor This is som
29. al control of some systems Once owners have registered their username and password they can use a supported device such as an iPad to check battery SOC monitor and control at home charging or even begin cabin conditioning using the HVAC Due to FCC controls and regulations a unique VIN and International Mobile Equipment Identifier IMEI must be registered to any TCU Therefore it is not pos sible to perform diagnosis or repair with a known good TCU or a recycled part Furthermore a replacement TCU can only be activated using the CONSULT III plus after any replacement The work support function provides the necessary registration steps CARWINGS will allow users to locate nearby charging stations while traveling without having to install GPS update DVDs The naviga tion computer is able to display the vehicle s range and display available stations 12 Nissan amp Infiniti Tech News updated today at 1 52 PM MEET 23 full 7 T HUDD Communicate with the LEAF remotely using SMS on a cell phone or the internet and a sup port device Shown here is the Apple iPad app A LEAF high voltage Lithium lon battery that is nearly discharged will begin to limit power distribution to the traction motor and A C systems to increase range The charge limitation indicator turtle light will turn on to alert the driver that the LEAF will no longer accelerate at the same rate The Owners Manual warranty supple ment will inc
30. cessary to perform cer tain special service requirements For example a zero point calibration can be performed for the EPS so the return home position is learned Restraint System and Miscellaneous Accessories The LEAF is equipped with many of the safety fea tures modern consumers have come to expect driver passenger side and curtain air bags The Supplemental Restraint Systems SRS are controlled in a conventional fashion utilizing G sensors yaw sen sors and crash sensors to logically determine whether a crash has occurred from what direction and with what severity Repairing the LEAF after a collision requires more diligence than normal due to the pres ence of high voltage Follow the service manual guide lines for properly disabling 12V and high voltage prior to working on SRS components Air conditioning is controlled electronically by what Stroke sensor Required braking GOD force operation intelligent brake Hydraulic braking force operation Master cylinder Hydrauli ntrol pressure sensor 1 ydraulic contro Friction brake Caliper Hydraulic braking force 00 Pedal input value 2 Required braking force Regenerative braking force effective value o Target hydraulic braking force Adjustment pressure F B 9 Hydraulic pressure 4 Regenerative braking VCM force operation Required braking force Nissan terms the A C Auto Amp The electric
31. d the torque sensor within the column will report the value to the EPS control unit At that time the control module will get vehi cle speed information from CAN and perform a calculation to determine the assist torque signal Depending on whether the driver is turning left or right the torque signal will be a positive right or negative left value The signal is interpreted by the EPS motor which draws enough current to match the determined output torque Like a win dow motor the EPS motor turns clockwise or counterclockwise based on the path of the current determined by the control unit The EPS motor rotates a reduction gear that will move the steer ing shaft and change the final drive torque that actually works on the steering gear pinion Because the steering shaft receives more torque directly applied to it the U joints are Make sure the column is the specified length in the case of accident repair A small amount of compression can create a lot of problems 30 Nissan amp Infiniti Tech News strengthened to accommodate the design The dashboard and chassis have to be designed to allow for a larger steering column as the EPS set up is quite a bit larger than a normal column In the event of collision where damage to the steering column is a possibility it may be neces sary to replace the complete column and EPS assembly With the column out of the vehicle measure the length between the input of the steering whee
32. e 24 Nissan amp Infiniti Tech News sites provide critical information regarding the location of various construction materials within a vehicle Then visit the Nissan TECH MATE website www nissantechmate com for lists of required or approved tools equipment and supplies For example Nissan requires Celette frame racks and fixture equip ment as well as certain adhesives such as 3M DP420 or 3M 8115 Nissan has partnered with I CAR for collision train ing Currently collision program training for Nissan cer tified collision facilities is an I CAR focused training pro gram advises Mark Zoba Nissan manager for Collision Parts Service Sales and Marketing To be a Nissan certified facilities must attain Car Gold status Full requirements to acquire Gold status can be found at the CAR website www i car com We ve already devel oped a GI R course and are looking at adding additional Infiniti and Nissan specific courses in the future Chemical bonding adhesives have proven to be ideally suited to modern vehicle bodywork repairs when high strength metals plastics carbon fiber and emerging composites are present Compared to more traditional joining technologies for new lightweight materials mod ern two component adhesive formulations and chemical bonding repair procedures allow all the properties of the repaired components to be more closely returned to their original state SHIFT the way you move
33. esting the system and how it will interpret the results you ll be able to set up your own testing drive under appro priate conditions monitor the sensors the TCM uses to test and apply the logic the TCM applies A little research observation logic some simple math and you ll be in a position to evaluate what s happening just like the TCM but with a lot more processing power and flexibility of thought Divide and Conguer Divide and conquer is a term adapted to a network diagnostic technigue that works wonderfully for almost any diagnostic situation In essence the idea is to test the system from as close to the middle as possible Nissan amp Infiniti Tech News 15 Nissan amp Infiniti Automatic Transmission Failure Diagnosis decide which side has the problem then divide that side in the middle as well decide which side has the problem and continue to divide and decide until the problem is isolated The center of the system is the TCM Inputs and outputs are all on display from the comfort of the dri ver s seat using the CONSULT III PLUS The CONSULT Il PLUS allows the technician to view the system from the middle You ll be able to see what the TCM sees and how it responds the relevant input signals and the output commands Often the Service Engine Soon MIL and AT Check light will come on when there is a problem with shifting Sometimes this will happen before the driver even notices any o
34. et if the VCM does not see expected changes in current application due to sensor error or an internal problem The LEAF requires a CON SULT III plus for diagnosis and repair Like an internal combustion engine that performs differently according to changes in the intake charge and timing an electric motor is dependent upon the fre quency and amperage of the supplied current It is the job of the VCM and the inverter to create the equivalent of an intake charge for the traction motor It does this by adjusting voltage based on two calculated values target force and motor torque request signal Because the resistance within the system is con stant changes in voltage affect amperage propor tionally think Ohm s Law Target force is based upon sensor input from the accelerator pedal position vehicle speed and shift position Other systems like ABS or VDC will send torque down signals to the VCM to reduce motor torque output Once deter mined the VCM will com mand the inverter to con vert DC from the battery pack into AC of the specif ic amperage torque and frequency rotational speed Thanks to thermo dynamics this conversion work also generates heat which is transferred into the cooling system and dissipated by the radiator in a traditional manner The LEAF also charges the battery by working in the reverse of the above method Instead of creating synchronous electromagnetic fields during regenera tion the
35. etimes reterred to as a zero point calibration Basically the EPS needs to be told what things look like when the wheels are pointed straight ahead and the steering wheel is centered without being actively turned To set the zero point for the steering angle sensor you must use the CONSULT III PLUS and navigate to the ABS ECU work support section to choose ST ANGLE SENSOR ADJUSTMENT When performing alignments the steering angle is not adjustable at the steering gear itself It is necessary to finish the physical alignment process with adjusting the neutral position of the steering angle sensor as noted above Forgetting this step may cause the customer to literally have to tight the power steering system to drive straight Some Debate It has been argued that electronically controlled steering assist may not be as safe as conventional systems but this is simply not supported by the facts EPS failures that result in loss of power assist are cited as the primary risk for crash yet how is this any different trom a hydraulic system that loses pressure from a slipping or broken belt or fluid volume due to a leak More often motor assist remains ON despite having completed a turn which means driver input is required to return the wheels forward This is more annoying than dangerous Sensationalism would have us believe the EPS motor gets stuck on and drives the car off the road How often does a power window get stuck on indefinitely
36. finiti Tech News 23 Nissan amp Infiniti Chemical Bonding Nissan has partnered with I CAR and DuPont Performance Coatings to qualify and provide training to collision facilities so that they can become part of the Nissan Certified Collision Repair Network Look for an upcoming Nissan Infiniti Tech News article for more details courtesty CAR Avoid cross contamination by working on the sepa rate metals in different areas and with different tools Clean surfaces are required for proper bonding It is also important that bare metal be bonded to bare metal and not to painted surfaces When rivet bonding be sure to bevel the drill holes so that panels can be compressed snugly together Technicians should also note if rivets are involved repairs involving aluminum should use aluminum rivets while those involving steel should use steel rivets A coating of zinc dust to prevent corrosion may also be required During the final assembly ensure that the new panel aligns properly to where it will be attached and check for gaps A specitied reinforcement plate may be required Following Nissan Requirements and Recommendations is Essential Nissan provides a number of resources tor making complete safe repairs tor new lightweight materials For example As a starting point consult the Nissan or Infiniti serv ice information websites www nissan techinfo com or www infiniti techinfo com In addition to other data thes
37. g column mounted EPS in which the motor control module steering wheel torque sensor and reduction gear are located under the dashboard in one large group This EPS design simply boosts the driver s steering wheel input torque rotating the steering shaft and caus ing the steering gear to move That s really the entire setup It eliminates the need for engine bay design to accommodate a pump pressure and return hoses reservoir and a heavy power assist rack We will explore the components in depth later Another EPS design has the motor mounted directly on the power steering rack The EPS rack assembly contains the DC motor motor angle sensor and steering torque sensor In the Altima hybrid high voltage trom the battery is stepped 28 Nissan amp Infiniti Tech News ar EPS DC DC converter CAN communication Brake ECU Steeringangle sensor down to 42V for the EPS motor within a DC DC converter that is on top of the battery pack The steering angle sensor is mounted within the steer ing column All EPS sensor input is collected by the EPS control unit which is located under the hood by the left strut top mount This design is comparatively more complicated than the above mentioned steering column EPS Nevertheless rack mounted EPS is more elegant and less spread out than a bunch of hydraulic components strewn about the engine bay The last design is a combined electronic hydraulic power assist system Quite simply t
38. hange when possible Select 80 charge limit mode when your daily r r driving journey is short Use the ECO MOCE for a gradual and smoother acceleration and for a reduced drive load If your vehicle will not be driven for a long period of ww time limit State of Charge to below 80 selecting 80 charge limit mode This LEAF driver may be a bit too aggressive in driving or usage habits The Battery Usage Report can help your customers improve their range jeje mms tear driver is gentle on the high voltage battery The Battery Usage Report is a table designed to illustrate the projected condition of the battery under current usage In the top graphic the driver does not stress the high voltage battery with repeated quick charges fast acceleration frequent ACC only idling or continual use of the A C Gradual loss of capacity is a normal battery characteristic Nissan states that the HV battery is expected to perform at approxi mately 80 of its original performance after five years of average use However battery capacity and range can vary depending on a number of factors including age and usage of the battery number of passengers and payload air conditioning heater usage high speed or stop and go driving and topography Springtime for Electric Vehicles The electric vehicle movement is gathering sup port and momentum and will require an additional level of expertise Shops that train a
39. hanical wear is best diagnosed by examining the fluid and the inside of the transmission pan Clutch wear is usually diagnosed through a combination of test driving and fluid pan examination Fluid pressure issues should be diagnosed using a pressure gauge and the tests outlined in the service manual Only the Good Stuff Because a CVT operates on principles far different from those of regular automatics NS 2 fluid is an absolute requirement That doesn t mean however that other Nissan transmissions should be filled with generic ATF Using only genuine Nissan O E fluid will help assure that your customers avoid expensive repairs It s been said that It s better to miss a fluid change than to use cheap ATF Amen There are numer ous aftermarket companies out there that push the one size fits all idea where ATF is concerned and use the dubious phrase meets OEM standards to promote their products We beg to differ If you want to save your customers from expensive trans damage and differentiate your maintenance servic es use only OE fluid from your local Nissan Infinity dealer s parts department for your flush and refill jobs Buying in bulk will make it economical Also one of the first steps in a transmis sion transaxle diagnosis should be to determine what s in there perhaps by quizzing the car s owner Especially where harsh engagement shudder and delay are concerned just a switch to the right stuff read the dipstic
40. he crank driven power steering pump Is replaced by an electronically controlled DC motor driven pump that generates the necessary fluid pressure Nissan calls this hybrid EPS The hybrid EPS con trol module calculates pressure based on input trom the steering angle sensor on the column and the steering torque sensor in the steering gear The pump motor and control unit are combined into one hybrid EPS unit located under hood Fluid pressure is transmitted conventionally into a hydraulic power steering rack that works on the steering linkage This system retains the primary efficiency advantage ot being able to control the running time of the power steering pump All EPS control modules use CAN EPS control unit ABS actuator and electric unit control unit Steering angle sensor Combination meter Hybrid Electronic Hydraulic EPS design communication to get the vehicle speed from the primary ECU or ABS computer Vehicle speed will affect output torque signals because low speed steering will require greater assist than high speed driving Any electronic power steering has fail safe modes designed to protect the DC motor from over running or the driver from losing steering control in case of emergency In most instances if electric assist is impossible the steering wheel input will still move the steering gear or rack requiring increased driver effort warning indica EPS motor EPS control unit Seen from above the EPS m
41. he vehicle is stored OFF for an extended time the VCM will periodically charge the 12V battery for five minutes every few days Nissan cautions LEAF owners not to leave the HV battery SOC above 80 when storing the vehicle as it can affect the longevity of the battery pack High voltage components generate heat Except for the battery this heat is handled using an aluminum core radiator and electric fans Two electric water pumps are controlled by the VCM and set in series to operate together for redundancy The VCM can control the amount of cooling by directly operating the water pump duty cycle Sensors within the DC DC junction box traction motor and on the inverter will report operating temperatures to the VCM Use only Nissan genuine pre mixed coolant blue and never use stop leak additives because they can damage the elec trical components Maintenance and Driver Conveniences The LEAF is equipped with cellular telemetry live updates and remote control This system is called CARWINGS The telematics control unit TCU lives under the dash near the right passenger kick panel Nissan cautions service personnel who rely on cardiac pacemakers or other lite support systems to be mind ful of the interference that the telematics antenna can cause The LEAF is capable of using both Simple Message System SMS colloquially called text mes saging and Internet connectivity to provide drivers with basic status information and bi direction
42. hesive which increases structural integrity and acts as an anti corrosive isola tor Carbon fiber panels along with plastic and sheet molded compound panels are used to completely close out the GT R underbody Attaching vehicle parts that are of two different types of materials should only be done by following the repair procedures approved by Nissan Standard welding methods cannot be used to join these many new met als because welding could deform them and the inter action between the metals may lead to premature cor rosion beneath repainted finishes Likewise welding would destroy newer nonmetallic materials In these instances chemical bonding may provide a viable alter native Some repairs to Nissan vehicles may only require a two stage adhesive Others may require the use of adhesives in conjunction with other fastening methods such as bolts or rivets Others may even require the addition of specialized welding procedures Should rivet bonding be required here are several key considerations that will help conserve limited work ing time and perform a complete sate repair Technicians must know the composition of what they are going to cut into beforehand Before using an adhesive application instructions and repair procedures must be understood The use of approved parts tools fasteners and adhesives is essential In particular this new method requires the use of a punch riveting tool Nissan amp In
43. i Tech News Nissan amp Infiniti Tech News is a publication of Nissan North America No part of this newslet ter may be reproduced without the express writ ten permission of Nissan North America Group Publisher Christopher M Ayers Jr cayers Qautomotivedatamedia com Editorial Director Bob Freudenberger bfreud automotivedatamedia com Managing Editor Tom Nash tnash automotivedatamedia com Contributing Editors Bob Chabot bchabot automotivedatamedia com Paul Cortes pcortes automotivedatamedia com Phil Fournier ffournier automotivedatamedia com Christian Strohm cstrohm automotivedatamedia com Art Director Jef Sturm jsturmQautomotivedatamedia com Nissan North America Project Manager Don Meier don meier nissan usa com Nissan North America Technical Content Advisors Edwin J Hibma ed hibma nissan usa com James Von Ehr james vonehrQnissan usa com Editorial and Circulation Offices 134B River Road Montague NJ 07827 Phone 330 620 3929 Website www mastertechmag com Gaution Vehicle servicing performed by untrained persons could result in serious injury to those persons or others Information contained in this publication is intended for use by trained professional auto repair technicians ONLY This infor mation is provided to inform these technicians of conditions which may occur in some vehicles or to provide information which could assist them in proper servicing of these vehicles Proper
44. ick Charge port can be installed in the LEAF allowing a zero to 80 State of Charge SOC in about 30 minutes These high powered stations are available in some locations and can be found using the LEAF s navigational unit However repeated Quick Charging may shorten the lifespan of the battery pack Every 12 months regardless of mileage Nissan requires the annual Battery Usage Report for warranty purposes This must be done with the CONSULI III plus We will discuss the report below in the mainte nance section Nissan amp Infiniti Tech News Transmission and Drivetrain The LEAF does not have a CVT or planetary gear transmission but rather a reduction gear that looks much like the gears in a shop roll up gate The electric motor output speed and torque can be precisely controlled so there is no need for a conventional transmission s chang ing gear ratios On top of the reduction gear housing is where the electronic park position actuator lives and a parking pawl is found inside the case The LEAF uses a unique parking feature which can be set or released with the electric shift selector which inputs the command park drive or reverse to the shift control module Once set the BCM transmits the ON OFF command to the electron ic shift control module The shift control module alerts the VCM of the signal then commands the parking actuator to operate which will lock or unlock the parking pawl appropriately This is
45. k owner s manual and fluid requirements at www nissan techinfo com may actually cure the problem Chances are however that the damage has already begun so explain to your patrons that since transmission repairs are a multi thousand dollar proposition these days it s only sensible to keep Genuine Nissan ATF in those technological marvels always Of course you are aware by now that using any thing but NS 2 in a CVT will ruin it in short order Nissan amp Infiniti Tech News 19 Nissan amp Infiniti Tech News Feature Nissan amp Infiniti Tech News Are you repair ready for chemical bonding ARE YOU REPAIR READY ARE YO V A Ce w d e A E me e ay rr F d d w d T j mk Collision professionals must remain current in the four key resource areas shown above Only then can they be fully competent to perform complete safe repairs for customers courtesy ManicMedia LLC Hot on the heels of advanced high strength steels and alloys vehicle structures are now incorporating more thermoplastic carbon fiber and other composite materials The ongoing quest for lighter vehicle weight performance without compromise improved safety and lower manufac turing costs is driving the shift to these new materials Nissan customers are already driving vehicles made in part from these new materials and more are on their way Consequently chemical bonding using structural adhesives
46. l to the output of the EPS motor and compare with the specification in the service manual Also check the steering column rotating torque with a preload gauge SST ST3127S000 to determine whether the column is bent or there is an internal problem Increased column rotating torque at certain points of travel may cause erratic power assist Components of the Rack Mounted EPS Design Control of the electric steering rack design is functionally identical to the steering column mount ed EPS Steering wheel torque input is processed by the EPS control unit which then determines the necessary amount of motor assist to provide The control unit requests and distributes power from the DC DC converter to step down the high voltage into the maximum 42V needed by the EPS motor CAN communications provide the steering angle and vehicle speed data The electric motor moves a worm gear and a sensor reports its rotation angle to the EPS control module Consult the service manual to determine the precise locations of every component within a rack mounted EPS design The motor and torque sensor are part of the EPS rack but the control module and DC DC converter will be located elsewhere The Hydraulic Electric Hybrid EPS The layout and design of a hydraulic electric hybrid EPS setup will look similar to conventional systems In fact it may actually fool you at first glance as the design requires pressure lines a fluid reservoir and hydraulic r
47. lude emergency contacts for road side charging or towing Towing a LEAF must be done with a flat bed or with the rear wheels trailing If a LEAF is towed with the front wheels on the road the traction motor may generate electricity and cause damage to the EV components The LEAF still requires periodic maintenance Nissan recommends changing the brake fluid and cabin filter every 15K along with inspections The high voltage cooling system should be serviced every 125 000 miles Details are in the LEAF service manu al Every 12 months regardless of mileage the EV component warranty requires a Battery Usage Report This report is generated on a CONSULT III plus under the maintenance function Advice for your usage The recommendations below can help to minimize the ongoing impact on your LEAF Li ion battery which can affect your battery s total capacity over its lifetime Cause of gradual Item Y ru loss of capacity 1 Recommendation 9 our score Your score is very high Frequent use of f Quick charging BD don ryer battery Charging Frequent charging Your score is very high when batter state of and good for your charge is already high battery Too much electric Your score is very high Driving consumption and good for your while driving battery Long term parking Your score is very high Storage with high state of and good for your charge battery Recommendation Your score Use normal charge equipment not quick c
48. ly trained technicians have the equipment tools safe ty instructions and know how to perform repairs correctly and safely If a condition is described DO NOT assume that a topic covered in these pages automatically applies to your vehicle or that your vehicle has that condition Summer 2012 Volume 5 Issue 2 Contents Features Department 04 Leaf Nissan s all electric LEAF incorporates both new and existing technologies This article will familiarize readers with the unique features and design of this car and provide insight into its expected maintenance and service needs in the future 14 Automatic Transmission Failure Diagnosis Modern automatic transmission failure diagnosis can be daunting Use these easy methods for testing the suspected component or system research the specific service information and apply a little logic and you ll get the job done faster and more accurately 20 Glue amp Stick Hot on the heels of advanced high strength steels and alloys vehicle structures are now incorporating more thermoplastic carbon fiber and other composite mate rials The ongoing quest for lighter vehicle weight per formance without compromise improved safety and lower manufacturing costs is driving the shift to these new materials 26 Electronic Power Assist Electronic power steering systems EPS are now more common than ever on newer Nissan vehicles This article covers the
49. me In addition baking ultraviolet light hot air welding or other procedures involving applied heat may be required Managing the types of stresses that a vehicle will encounter post repair is also essential This requires matching the right adhesive to the expected stresses and following more intricate bonding procedures It s the new normal For example bonding with structural adhesives is particularly effective in instances where the primary stress forces are either compression or shear where TYPES OF STRESS Tensile stress stretches a bonded repair Shear stress twists a bonded repair laterally cue IO m Compression stress shrinks a bonded joint Chemical bonding alone or in conjunction with other techniques is an effective joining process for managing the above types of stress courtesy Dow Automotive Systems Torsion stress wrings a bonded repair Nissan amp Infiniti Tech News 21 Nissan amp Infiniti Chemical Bonding Adhesion and cohesion are the two fundamen tal properties of adhesives used in bonding materials Adhesion red arrows is the attrac tion between the materials being bonded and the adhesive Cohesion blue arrows is the attraction between the molecules of the adhe sive itself which occurs as the adhesive cures courtesty 3M the force tries to slide the joined surfaces against one another like pressing your hands together and trying to slide them apart Conversel
50. mprove transmission per formance and longevity so always check for TSBs 3 a mt x TRANSMISSION ENGINE SPEED An Sit 5 TRANSWSSION OVERDRIVE SW LT o TRANSMIS Sao j 88 5 EA E53 ED Test driving the car using the DTC WORK SUP PORT will allow the CONSULT III PLUS to check each transmission function Output The output PIDs indicate what the transmission thinks it s doing If the transmission is not doing as commanded it s time to find out why This can be bro ken into five questions 1 15 the solenoid output signal leaving the TCM 2 Is the solenoid output signal reaching the transmission 3 ls the solenoid operative 4 Does the output have the support it requires fluid pressure 5 15 the actuator the solenoid controls receiving the desired output As stated earlier start in the middle is the solenoid operative There s usually no need to remove the sus pect solenoid trom the transmission for resistance test ing or power testing If the solenoid can be heard click ing it s likely the TCM output wires and solenoid are all okay If there is an active test available for the solenoid use it to cycle the solenoid If not it may be possible to operate the solenoid with the KOEO in gear depending on which solenoid and which car Finally the solenoid can be activated using the instructions in Nissan amp Infiniti Tech News 17 Nissan amp Infiniti Automatic T
51. n i eie m md m 1 IL iul gt Aii m wenn rd RIVERSIDE NISSAN Wem OS INDIANA AVD RIVERSEDE CACUZRUS Es EI w Tanapa m Re Arcas Wu pue rq Dari Demmi Le dame Va Heia nar DEM F rre Paris Click Once you re logged in the chosen part s are still in your in box but now the custom pricing of that dealer is shown Once added to the shopping cart you can continue to checkout Nissan amp Infiniti Tech News Feature Electronic power steering systems EPS are now more common than ever on newer Nissan vehicles This article covers the three types Nissan uses for its EPS a discussion of its advantages and tips for diagnosis and repair Nissan amp Infiniti Tech News Electronic Power Assist Systems EPS are starting to see wider implementation due to the advantages they bring for fuel economy and man ufacturing savings American consumers expect power steering as a standard feature Nissan works to meet that expectation by going beyond the conventional hydraulic power assist methods to create vehicles that utilize modern electronic controls for improved efficiency With any new technology comes the need for more training Here we ll help clarity the reasons for using EPS and describe system components their function and how to diagnose and repair each design The Advantages of EPS It s often tempting to dismiss some new auto motive inventions as niche market or luxury car only developmen
52. nd familiarize themselves with hybrid and electric vehicles will be able to retain their customers who eventually shift away trom their conventional gasoline vehicles The Nissan LEAF is very popular and will show up in your shop Will you be prepared Nissan amp Infiniti Tech News 13 Nissan amp Infiniti Tech News Feature Automatic Transmission gnosis Modern automatic transmission failure diagnosis can be daunting Use these easy methods for testing the suspected component or system research the specific service information and apply a little logic and you ll get the job done faster and more accurately Nissan amp Infiniti Tech News Automatic transmissions existed long before advanced electronic systems were available to control them What was once a virtually self contained system has now spread out While it s still called an automatic transmission it has actually become more of a con trolled transmission Without a lot of external help modern automatic transmissions are just a single speed gear reduction First the information necessary to make gear selec tion choices is now made based mostly on compo nents outside of the transmission housing The infor mation the throttle pressure cable once provided is now furnished by the ECM based on input from sen sors such as the TPS Vehicle speed is now also measured via sensors and relayed to the TCM through the ECM Finally the clockwork
53. ngs 2 output lates ignition and fuel shaft 3 rotor core 4 and permanent The traction motor takes the place of a conventional engine and generates torgue from precisely controlled electromagnetic fields The motor is basically two pri mary components the permanent magnet rotor and the coil windings of the stator Information about tempera ture or speed sensor loca tions cooling tubes and high voltage connections or other specific compo nents can be found in the service manual When three phase AC current is applied to the stator coil windings a con trolled electromagnetic field is generated This field pulls on the perma nent magnet inside the rotor causing the rotor to chase the generated field The Vehicle Control Module VCM can create a constantly rotating elec tromagnetic field using a rotor position angle sen sor much as an internal combustion engine regu using crank and cam sen sors The torque generat ed by the electric motor is approximately proportion al to the amperage of the current whose frequency or pulse timing affects the rotational velocity Current application is controlled by the VCM monitoring posi tion with the traction motor resolver and current flow from a sensor within the inverter Some DTCs Diagnostic Trouble Codes will limit the rotor rotational speed the torque output of the motor or both as a precaution A P3240 Drive Motor Current Control Malfunction may s
54. o aftermarket competitors have the advantage of being manufacturer tested and validated by Nissan engineers yet pricing of Value Advantage Brake Pads remains highly competitive with aftermarket products Improve Customer Satisfaction with the Nissan Value Advantage True Premium Ceramic Pad Make up Precision Steel backing plates Precision fit shims included See your local Nissan Dealer for details VALUE ADVANTAGE
55. oid may only be a short term solution TND GA FHCTH JED POSE ITH G POT JA TEC SM FNCTN PITH The DTC WORK SUPPORT feature on the CONSULT III PLUS can determine if a problem is currently occurring system description you know that the overdrive cancel button must not be pressed the transmission fluid must be up to normal operating temperature and the vehicle speed and load conditions must be suitable for overdrive gearing What inputs should be checked Probably the Throttle Position Sensor TPS Transmission Fluid Temperature Sensor AT Temp the O D lockout switch 9rd gear switch and vehicle speed inputs like the Vehicle Speed Sensor VSS and Output Shaft Speed Sensor AT REV These are the inputs the TCM will examine to make the decision In order to decide whether the problem is with input logic or control you should monitor relevant input research the logic descriptions and verify desired output If the 3rd gear switch PID is ON then the logic and out put are as designed so focus on why the 9rd gear PID switch is on Logic Once input conditions are met for a particular output the next question is Is the TCM output in agreement with the description in the service manual It s rare to see a logic failure so if you think you ve found one suspect a manual error Compare it against an identical vehicle before ordering a TCM However there are often updates available to i
56. otor and control unit on an EPS steering column Power steering oil pump assembly Power steering motor Power steering oil pump Motor control signal Motor position signal Flow connection valve control signal Reservoir tank Torque sensor Flow connection valve Steering torque sensor signal Steering gear assembly tor will illuminate on the gauge cluster and DIC information is stored that can be retrieved using a CONSULT III PLUS In the case of the hybrid electric EPS the steering rack will fail safe to hav ing equal fluid pressures on either side of the internal rack piston and open the flow connection valve to alleviate resistance In the case of pro longed assist demands the EPS motor will reduce output gradually This protection function also works in the event the motor is shorted or other wise powered incorrectly and does not rely on prolonged steering input Torque sensor Reduction gear Seen from the side the torque sen sor and reduction gear You can get a sense of the additional height and size a steering column will require under the dash to add EPS Nissan amp Infiniti Tech News 29 Nissan amp Infiniti Electronic Power Assist A Closer Look at the Steering Column EPS The steering column EPS is the most common system and also the most simple in design Until the driver moves the steering wheel the system does nothing and remains in standby If the steer ing wheel is move
57. outer field is maintained stationary The rotor magnet moves through the field creating a current flow by the electrical property of induction This AC current is captured by the inverter converted to DC and stored in the battery pack The VCM pertorms the regenerative charge constantly at deceleration effec tively slowing the vehicle In ECO mode the LEAF will regenerate more aggressively however in both This diagram indicates the location of the 403V lithium ion battery pack 1 and the sional installation of a service plug 2 modes when the battery is at the fully charged state no regeneration is performed This is to protect the battery trom overcharging The heart of the powertrain is the 403V Li lon battery pack arranged beneath the floor of the leat Every cell of the 48 modules is moni tored and the CONSULT III plus can display many rele vant PIDs for the battery pack such as module volt ages total voltages charg ing discharging voltage dif ferences and the four bat tery temperature sensor signals Yes if there is a battery cell malfunction a DTC will point directly at the problem cell Considering the pack weighs a total 648 los we should be thankful that any one of the modules can be replaced in the event of failure The LEAF comes stan dard with two ways of charging the battery pack at home using domestic AC The Normal Charge method requires profes 240V source at home and achie
58. ower from a lithium ion battery pack composed of 48 modules in series each containing four laminated cells to produce a total of 403V water cooled inverter changes bat tery power as necessary from DC to AC to drive the motor and likewise from motor generated AC from regenerative braking to DC to charge the battery pack Regenerative battery charg ing is achieved by converting the kinetic energy of the already moving car into power through induction within the traction motor The suspension is independ ent MacPherson struts in the front and a solid l beam in the rear with shocks Steering input is rack and pinion with an electronically controlled electric power steering rack It s equipped with standard ABS using four wheel disc brakes Vehicle Dynamic Control VDC is standard and enhances safety and handling The instrument panel has two separate displays for the driver showcasing unique LED styling for electric power consumption and Nissan s usual dot matrix infor mation screen An integrated navigation unit comes standard using GPS and telematics to show the vehi cle s estimated range and nearby quick charge locations magnet 5 Powertrain The first description of the LEAF is invariably that it s an electric car so we should begin with how it works without an internal combustion engine 6 Nissan amp Infiniti Tech News The traction motor consists of the I stator core 1 coil windi
59. proper use of modern adhesives in bonding repairs Provides more durable and stronger repairs with less corrosion risk than just welds In fact adhesives usually form a bond stronger than the materials they re bonding together Reduces the number of welds that would have oth erwise been required For example OEM rivets and OEM structural adhesive are used in areas that squeeze type resistance spot welding STRSW arms cannot access Helps resolve problems with cracks around spot welds occurring as a result of fatigue loads In addition adhesives also enable hybrid sandwich construction to be employed in manufacturing Optimizes the energy flow of the various stresses during normal vehicle operation or a collision These forces can be more evenly distributed across a region that is joined with adhesives when compared to those joined only by welds rivets or other joining methods In some cases Nissan requires procedures where adhesives are used along with other fas tening methods For example proper repair of the GT R requires the use of adhesives in the bonded and bolted joint where the aluminum rail attaches to the front steel structure and also where the aluminum bulkhead attaches to the rear bulkhead Adhesives are also used on the wheelhouse to quarter panel hem flange joint courtesy I CAR Consult TECH MATE for Nissan approved equipment tools and supplies required to perform chemical bonding repairs E
60. ransmission Failure Diagnosis Transmission fluid should be translucent and free of floating debris Most fluid is dyed red but some fluids like NS2 may have a different tint Some types of fluid have a sweet odor when in good condition but others can smell a little sharp even when new Don t rely on odor as a gauge of condition unless you are familiar with what normal smells like the manual while listening for clicking A fuel injector balance tester is a handy tool for this method Mechanical and Hydraulic Problems Once problems with transmission control systems and solenoids have been examined there are still plenty of things that can go wrong inside the transmission case The most common causes of failure can be put into three categories 1 Mechanical wear causing noise vibration The debris from the failing parts may also jam solenoid valves 2 Clutch wear causing excessive clutch pack clearance and slipping This too may cause solenoid valves to get stuck 3 Inadequate fluid pressure caused by either poor pump output or internal leaks Nissan amp Infiniti Tech News Transmission fluid becomes opaque and brown as it degrades An acrid burnt odor and floating bits of clutch bushing and steel shavings are signs of trouble Fluid pressure does most of the work in the transmission Use a pressure gauge to find out whether fluid pressure is adequate and if it s being directed properly Mec
61. ther symptoms When a DIC is pres ent it s almost always best to start with trouble code diagnosis before trying to diagnose by symptom but in the end every situation is different so do what makes the most sense based on the situation Diagnostic Trouble Code Diagnosis Start by looking at Freeze Frame Data FFD Perhaps looking at is not a good way to say it FFD should really be examined or analyzed Look careful ly at all of the PIDs Are they related to the DIC detec tion logic contained within the FFD If so can you see why the code set Are any of the PIDs obviously impossible The TCM uses rational comparison of inputs and so can you Also note all of the conditions related to the conditions when the code set so that you can duplicate them on a test drive for diagnostic and repair confirmation purposes When a transmission related DTC is found or you suspect a condition exists that might cause a code with a little more duration try the DTC WORK SUPPORT feature in CONSULT III PLUS It s a very handy tool to determine if a problem is currently occurring DTC WORK SUPPORT for AT codes can be found by selecting AT gt DTC WORK SUPPORT then choosing the appropriate test for the DIC or symptoms In order to run the DTC WORK SUPPORT test the driving con ditions must match the test criteria In other words if you re testing for 1st gear function you ll need to drive the car under conditions that allow the TCM
62. three types Nissan uses for its EPS a discussion of its advantages and tips for diagnosis and repair 27 Nissan amp Infiniti Dealer Listings Nissan amp Infiniti Tech News Nissan amp Infiniti Tech News Feature Nissan amp Infiniti Tech News Nissan s all electric LEAF incorporates both new and existing technologies This article will familiarize readers with the unique features and design of this car and provide insight into its expected maintenance and service needs in the future The LEAF was introduced in 2011 as Nissan s pio neer vehicle for the future of electric cars It has a dis tinctive body design not based on any other platform in the Nissan fleet giving it a road presence unlike any other compact car Prominent LED headlights and a long LED cluster tail light coupled with blue chrome accents make the LEAF impossible to confuse with other vehicles plus once you pop the hood nearly the only thing that looks normal is the faux valve cover Let s take a closer look at the features of the new LEAF to try to strip away some of the mystery The stylish faux valve cover is set on top of the inverter unit and creates a traditional engine bay appearance Nissan amp Infiniti Tech News Nissan amp Infiniti The Nissan LEAF Overview The LEAF is a front wheel drive car utilizing an all electric three phase traction motor and reduction gear to drive the CV axles The motor gets its p
63. to power off the LEAF during brake fluid flush mainte nance in order to bleed the lines Nissan amp Infiniti Tech News Nissan amp Infiniti The Nissan LEAF LI 4 Pj F FM ii The Intelligent Brake Unit is not independently serviceable but is monitored completely by the VCM and will report any malfunction using the MIL and dedicated bulb indicators The LEAF s Electronically Controlled Power Steering System EPS generates optimal power assist torque based on the load on the front wheels steering wheel turn ing torque and vehicle speed The EPS unit is attached to the steering column and its output shaft connects to a standard rack and pinion During operation sensors detect the motion and torque of the steering column driver input and the EPS module calculates the necessary assistive power using an electric motor within the EPS unit Therefore the motor can provide a varying amount of assist based on steering input the greater the steering 10 Nissan amp Infiniti Tech News input the greater the amount of current supplied to the EPS motor for assist Since electricity is only required when assist is needed the total draw on the 12V battery is reduced The EPS employs a reduction gear to properly transmit output torque into the rack assembly Diagnosis and repair of braking and steering systems must be done with the CONSULT III plus After compo nent replacement it is often ne
64. to test the function of 1st gear Instructions for doing this can be easily found in the service manual Still using the 1st gear function as an example look under the diagnosis 16 Nissan amp Infiniti Tech News section for PO731 1st gear function and use the Diagnostic Trouble Code Confirmation Procedure found there The guided testing of DIC WORK SUPPORT is not the only method of diagnosis albeit a convenient one When all else fails it s possible to use logic to diagnose the problem However in order for logic to work you must have true statements to work with and the best place to find the true statements is in the service manual It s important to note that the presence of a DIC may alter the logic of the transmission For instance if the transmission is slipping badly in 1st gear and a PO731 is set the TCM could decide not to use 1st gear and start off in 2nd If you want to confirm the original symptom on a test drive you may need to clear any DTCs first Inputs It makes sense to start by looking at the inputs as output is based on it Let s say a vehicle is in the shop with the complaint of no overdrive After checking the Solenoids can fail electrically an open or short in the windings or become stuck Sticking is usually caused by fluid contamination Fluid should be replaced if a stuck solenoid is found However if a transmission is worn and contin ues to dump debris into the fluid a replacement solen
65. ts EPS is here to stay and it will become more common When compared to con ventional hydraulic assist EPS is cheaper to make malfunctions or breaks down less often and reduces the load on the engine for performance gains and greater fuel efficiency You ll find EPS installed in the newest Nissan Juke Sentra Versa Rogue LEAF Altima and Infiniti M Series hybrids and likely more models in the coming generations This is a wide scale shift in the manufacturing process and it is our responsibility as technicians Steering column assembly i iTorgue EPS motor Sensor 14 gt PA ccc Reduction gear EPS Steering gear assembly Column mounted EPS design l 7 Sensor processing unit to stay informed about the details of function diagnosis and repair Let s discuss how Electronic Power Steering achieves these benefits before we launch into the different designs that Nissan uses First and fore most power assist is generated with a DC electric motor instead of a pump connected to the crank shaft Motor speed can be directly controlled to produce the necessary assist pressures based on sensor input Conventional power assist is dependent on engine rpm and requires idle up signals for slow speed parking to prevent engine stalling and to provide adequate rpm for the necessary fluid pres sure Furthermore conventional power steering pumps are always
66. ving a full charge will take approximately six hours The Trickle Charge method will allow 120V household electricity to fully charge the battery in approximately 21 hours The trickle charge method is not recommended for normal use according to the Owner s Manual but can be useful when at a friend s house This charging method may use power a bit erratically charging and discharging capacitors for example that may trip household breakers or cause other leaks to ground Anecdotally it appears that the trickle charge is not recommended due to its unrelia bility Using the trickle charge method will not cause damage to the vehicle It is best to follow Nissan s rec ommendation Nissan amp Infiniti Tech News 7 Nissan amp Infiniti The Nissan LEAF CAUTION VOR CUATELA AT i 1 SEO choi Lachen Lior ky clo d asmontabon mpfi Hi Cx Ivericle montes le chargsnmort man ol ac alin de cari ee Loge a hop despude do i arpa Por un c alen dan AF YW d ac x xfi ako Focha bunn choros chy TORE TER OTTER SET z DS ik P FH HP b Pr bm se at DE AB QT UR FP SE E T TTIiLriLLLLWLLLLTLITE SH amp M DAD DDINI DR Got ee Zeg Al anm gu yr STR ow Or y i The port on the left is for quick charge Shown here the LEAF is using the shop s 240V to get a little charge while in for service An optional Qu
67. wer output flow power of the regeneration process by monitoring the AC generated simply the inverse of how it calculates target motor speed and torque Here s how the LEAF comes to a stop First the Stroke Sensor in the brake pedal assembly measures the pedal travel driver input and gives this information to the IBU con trol module From this input and with data from CAN communi cations about the vehicle speed available cooperative regenera tion slowing force and wheel speed sensors the IBU module commands the brake actuator to develop required hydraulic pres sure within the brake master cylinder using the actuator motor to control the master cylinder piston As the traction motor develops braking energy through regeneration the VCM will transmit the regenerative force to the IBU using the CAN bus The IBU will then command the master cylinder actuator to reduce hydraulic pressure in response to traction motor brak ing If the lithium ion battery is fully charged no regeneration will occur and hydraulic pressure alone is used for braking In the event of an emergency power outage the LEAF can still provide friction braking The IBU fail safe feature allows physical master cylinder control with the brake pedal When the LEAF has no power solenoids that would otherwise be energized default to a position that allows the pedal to directly interface with the master cylinder For this reason it is nec essary
68. xamples include the fixture equipment and rivet bonding guns courtesy I CAR Improves noise vibration and harshness NVH by dampening airborne noise distribution and minimizing body vibrations Increases structural integrity and acts as an isolator between the dissimilar metals preventing galvanic cor rosion Empowers the future introduction of lighter weight carbon fiber roots and other non steel and non alloy components without compromising strength pertorm ance satety or durability Because different bonding adhesives have unique properties to provide acceptable or improved elasticity and flexibility in addition to better stress management for the materials being bonded collision repair facilities and technicians must be vigilant The use of the wrong adhesive and or incorrect bonding repair procedure whether from ignorance or negligence compromises everyone Rivet Bonding is on the Rise New vehicle construction techniques mean new pro cedures in collision repair are needed to maintain the integrity of a vehicle in the case of any following acci dents Consider the Nissan GI R that uses a multi material design of high strength steels aluminum and carbon fiber While high strength steel is used for most of the GT R structure cast aluminum is used for the GI R front strut towers door shells and rear bulkhead The front strut towers and rear bulkhead are attached to the steel structure using an ad
69. y bonding is not as effective in locations where tensile or torsion stress forces are in play In cases where the tensile stress acting on the joint would pull the two pieces apart peeling or the torsion stress could bend or twist the joint collision repair pro cedures often specify that adhesives be used together with rivets rivet bonding or in conjunction with certain techniques such as spot welding The two stage structural adhesives in use today include polyurethane epoxies glassy matrix epoxies which have glass beads embedded in the resin and rubber based epoxies Glassy matrix epoxies for example are extremely strong and rigid and they resist shearing stress at very high force levels Polyurethane epoxies are more flexible and provide a better fit for some components but they break under shearing forces at much lower force levels than glassy matrix epoxies Newer rubber based adhe sives contain additives that allow synergistic rubber tough ening of adhesives to provide high strength epoxies with greater flexibility a hybrid of the earlier formulations Chemical Bonding Offers Significant Advantages Similar to higher strength metals newer plastics and other inbound composites come in different grades which impacts how each material performs under various 22 Nissan amp Infiniti Tech News stresses during normal operation and during a collision Adhesive manufacturers 3M and Dow Automotive Systems say that the

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