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Lada Niva 4x4 Service Manual Fuel Injection

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1. ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION 2 135 CHART C 4B Page 2 of 2 DIRECT IGNITION SYSTEM MISFIRE AT IDLE 1 7L THROTTLE BODY INJECTION NIVA CHECK THE RESISTANCE OF EACH PLUG CABLE OF THE WHICH DIO NOT FIRE THE SECONDARY IGNITION VOLT GE IGNITION TESTER CABLE RESISTANCE SHOULD BE LESS THAN 15 000 OHM EACH AND CABLES SHOULD NOT GROUNDED ARE CABLES OK REPLACE FAULTY CABLE S REMOVE COIL RETAINING NUTS AND REMOVE COILS COILS SHOULD BE FREE OF CARBON TRACKING ARE THEY SWITCH A NORMALLY OPERATING COIL WITH PROBLEM CYLINDER a Bee 4 SPARK SHOULO JUMP SECONDARY IGNITION VOLTAGE IGNITION TESTER GAP AT PROBLEM CYLINDER WHILE CRANKING ENGINE DIDIT REPLACE IGNITION COIL ALSO CHECK FOR FAULTY PLUG CABLE CONNECTION S AND CABLE NIPPLE S FOR CARBON TRACKING ORIGINAL IGNITION COILIS FAULTY REPLACE ELECTRONIC IGNITION MODULE CAUTION When handling secondary spark plug cables with engine running insulated pliers must be used and care exercised to prevent a possible electrical shock 4 27 93 AFTER REPAIRS START ENGINE CLEAR CODES AND CONFIRM NO CHECK ENGINE VAZ SERVICE MANUAL THROTTLE 8ODY INJECTION NIVA 2 136 ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION FUSE Y GREEN 14 PINK BLACK ELECTRONIC CONTROL MODULE 218ROWN d IGNITION SWITCH M
2. 21 BROWN 4 15 PINK BLACK CONNECTOR IGNITION SWITCH VOLTAGE INPUT SIGNAL 13 WHITE 86 PINK BLACK ELECTRONIC SPARK TIMING OUTPUT 05 55 MODE CONTROL es REFERENCE INPUT SIGNAL REFERENCE LOW 39 GREEN WHITE 40 BLACK WHITE 42 VIOLET WHITE 58 BLACK RED CRANKSHAFT SENSOR cou ASSEMBUES DIRECT IGNITION SYSTEM MODULE CHART C 4 Page 2 of 2 IGNITION SYSTEM CHECK NO SPARK 1 7L THROTTLE BODY INJECTION NIVA Circuit Description The direct ignition system uses a waste spark method of distribution In this type of system the ignition module triggers the correct ignition coil based on signals from the crankshaft sensor Each ignition coil provides the high sec ondary voltage required to fire rwo spark plugs at the same time on companion cylinders i e cylinders with pis tons at the top of their stroke top dead center at the same time One of these pistons would be at the top of its com pression stroke the other piston would be at the top of its exhaust stroke Test Description Number s below refer to circled number s on the diagnostic chart 6 If carbon tracking is evident replace coil and be sure plug wires relating to that coil are clean and tight Excessive wire resistance or faulty connec tions could have caused the coil to be damaged 7 This test will determine if the ignition module is not triggering the problem coil or if the
3. LE AIR CONTROL E NOT STALUNG ROUGH UNSTABLE OR HIGH WHITE CONTROL VALVE O INCORRECT IDLE 9 SEE CHART C 2C ES ro connec L T c9 NO CONNECTION d POOR PERFORMANCE ROUGH IOLE STALLING 9 SEE CHART 1 POSSIBLE STRONG EXHAUST TECH 1 READS 30 C 36 F 9 TECH 1 READS 179 C 354 F 9 POOR PERFORMANCE HIGH IDLE 9 SEE CHART C 1H HARD TO START WHEN COLD 11 SURGE RUNS ROUGH HIGH IDLE HARD TO START EXCESSIVE EXHAUST LOW 12 INTAKE INTAKE 27 TEMPERATURE TEMPERATURE INPUT SIGNAL SENSOR B 613 THROTTLE POSITION BLUE THROTTLE POSITION 03 07 INPUT SIGNAL SENSOR 614 sS VOLTS GRAY REFERENCE OUTPUT EMISSIONS OR ODORS POOR PERFORMANCE ROUGH IDLE 9 Ki NOCONNECTION 7 CiS POWER SUPPLY RED 32 B FUSIBLE LINK BLOWN NO START 10 ET if C16 AND 8 1 OPEN NO START SEE DIAGNOSTIC CIRCUIT CHECK 1 Battery voltage for first two 4 Varies With ignition ON reads 9 Open Grounded circuit seconds after ignition is turned barometric pressure With engine 10 Grounded circuit ON without cranking the engine running reads engine load 11 Short to 12 volts 2 when vehicle is stopped voltage Voltage will vary with engine Less than 0 50 volts will be either less than 1 volt o
4. ENGINE STOPPED DISCONNECT MANIFOLD HEATER RELAY FROM BLACK CONNECTION NEAR ASSEMBLY UNE DATA LINK CONNECTOR WITH TEST LIGHT CONNECTED TO GROUND AND IGNITION ON PROBE RELAY BLACK CONNECTOR TERMINALS 4 AND 785 m 2 SOTH TERMINALS SHOULD UGHT THE TEST LIGHT To DOTHEY r i CONTINU TO PAGE 2 OF 2 1 CIRCUIT THAT DOES NOT LIGHT TEST LIGHT 9 25 92 NS 15805 2 SERVICE MANUAL THROTTLE BODY INJECTION NIVA 189 2 140 ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION FUSER SLACK ELECTRONIC CONTROL MODULE 82 PINKS 76RED MAXIFUSE BLACK 81 PINK BLACK INTAKE MANIFOLD HEATER RELAY INTAKE MANIFOLD black relay connector ELECTRIC HEATER INTAKE MANIFOLD RELAY CONTROL HEATING ELECTRIC HEATER Located under ELEMENT intake manifold 9 15 92 NS 14402 Page 2 of 2 INTAKE MANIFOLD ELECTRIC HEATER 1 7L THROTTLE BODY INJECTION NIVA Circuit Description To assist in cold driveability the electronic control module controls a positive temperature coefficient heater This electric heating element is tumed ON by the electronic control module by supplying a ground to a control relay at the electronic control module s terminal C2 The relay completes the circuit and supplies voltage from a 50 amp maxi fuse to the heater The heating element is self current limiting as its temperature increases its resistance increases preventing ther mal overh
5. 1 7L BODY INJECTION NIVA IF ENGINE MISFIRES UNDER LOAD ONLY SEE CHART 4 IGNITION OFF DISCONNECT EACH SPARK PLUG CABLE FROM SPARK PLUG INSTALL HIGH CARBON CONTENT VACUUM HOSE APPROXIMATELY 5 CM LONG ON SPARK PLUG ANO CONNECT SPARK PLUG LEAD TO OTHER END OF VACUUM HOSE VACUUM HOSE PIECES FOUND IN TERMINAL TEST ADAPTER KIT 35616 i CONNECT TECH 1 SELECT FO DATA LIST ENGINE IDLING AT NORMAL OPERATING TEMPERATURE DISCONNECT IDLE AIR CONTROL VALVE WITH TEST LIGHT J 34142 8 CONNECTED TO GROUND MOMENTARILY TOUCH EACH VACUUM HOSE WHILE OBSERVING ENGINE SPEED ON TECHT SEE CAUTION WHEN THE TEST LIGHT CONTACTS EACH VACUUM HOSE IT SHOULD RESULT IN AN ENGINE SPEED DROP DIO THEY 4 WITH IGNITION OFF INSTALL SECONDARY IGNITION VOLTAGE IGNITION TESTER J 26792 57 125 ON PLUG CABLE S WHOSE SHORT TO GROUND THROUGH TEST LIGHT DIO NOT RESULT IN ENGINE SPEED DROP SPARK SHOULD JUMP SECONDARY IGNITION VOLTAGE IGNITION TESTER WHILE CRANKING ENGINE DOES IT SEE ROUGH UNSTABLE OR INCORRECT IOLE OR STALLING IN SYMPTOMS SECTION 8 CHECK FOR i FAULTY WORN OR CRACKED SPARK PLUGIS PLUGFOULING DUE TO ENGINE MECHANICAL FAULT IF SPARK PLUGS CHECK OUT OK SEE CUTS OUT MISSES IN SYMPTOMS SECTION 27 WITH IGNITION OFF USING CONNECTOR TERMINAL TEST ADAPTER KIT 135616 GROUND THE OPPOSITE PLUG
6. 47 BLUE NHITE cs co A HI 48 BLUE BLACK COIL A LO 49 GREEN WHITE coit 8 HI 50 GREEN BLACK Colt 78 LO CHART C 2C IDLE AIR CONTROL CIRCUIT CHECK 1 7L THROTTLE BODY INJECTION NIVA Circuit Description The electronic control module controls idle revolutions per minute with the idle air control valve To increase idle revolutions per minute the electronic control module moves the idle air control valve out allowing more air to pass around the throttle plate To decrease revolutions per minute it moves the idle air control valve in reducing air flow around the throttle plate A Tech 1 Scan tool will read the electronic control module commands to the idle air con trol valve in counts Test Description Number s below refer to circled number s on the diagnostic chart 1 The Tech 1 revolutions minute control mode is used to extend and retract the idle air control valve The valve should move smoothly within the speci fied range If the idle speed is commanded idle air control extended too low below 750 revolutions per minute the engine may stall This may be nor mal and would not indicate a problem Retracting the idle air c ntrol beyond its controlled range above 1800 revolutions per minute will cause a delay before the revolutions per minute start drop ping This too is normal 2 This test uses the Tech 1 to command the idle air control controlled idle speed The electroni
7. 82 NO CONNECTION 83 CRANKSHAFT MAY HAVE POOR PERFORMANCE REFERENCE LOW FLICKERING CHECK ENGINE LIGHT 9 NO START POSSIBLE IGNITION MODULE DAMAGE 11 NO START 9 SEE DIAGNOSTIC CIRCUIT CHECK AIR CONDITIONING o NO AIR CONDITIONING 9 E CHART CTO REQUEST INPUT AIR CONDITIONING RUNS CONTINUOUSLY an Battery voltage for first two seconds after ignition is turned ON without cranking the engine When vehicle is stopped voltage will be either less than 1 voit or greater than 10 voltts depending upon position of drive wheels When vehicle is moving voltage will vary depending upon vehicle speed Varies with temperature Varies With ignition ON reads barometric pressure With engine running reads engine load Voltage will vary with engine revolutions per minute Depending on octane adjust potentiometer trim BACK VIEW OF CONNECTOR Battery voltage B with engine warm Open Open Grounded circuit Grounded circuit Short to 12 voits Less than 0 50 volts Less than 0 10 voits Air Conditioning Vehicles Only 8 Should equal battery vottage 5 27 92 NS 14375 VAZ SERVICE MANUAL THROTTLE BODY INJECTION NIVA 165 10 COOLANT COOLANT c 91 2 Ta 15 HARD TO START HIGH EXHAUST TEMPERATURE TEMPERATURE EMISSIONS 9 pi INPUT SIGNAL SENSOR 5 cit MANIFOLD ABSOLUTE _ MANIFOLD 3 5 5 0 5 PRESSURE ABSOLUTE
8. A SEE CHART C 1D PRESSURE SENSOR AND MANIFOLD AIR INTAKE AIR TEMPERATURE TEMPERATURE A SENSOR GROUND los 04 ELECTRONIC 6 PIN SPARK TIMNG CONNECTOR HARD TO START STALLS WILL RESTART IN BYPASS SEE CHART C 4 9 STALLS POOR IDLE MAY SET CODE 42 11 LACK OF POWER POOR PERFORMANCE 8 11 BY PASS MODE SEE CHART 4 OPEN LOOP TECH 1 READS FIXED 400 500 mv 9 OUTPUT O5 IGNITION MODULE BLACK BYPASS CONTROL WHITE EPIN CONNECTOR D OXYGEN SENSOR COMPRESSOR CLUTCH RELAY CONTROL 016 FUEL INJECTOR CONTROL ELECTRONIC CONTROL MODULE 016 If 0167 15 OPEN NO START SEE CHART A 3 FLOOD ENGINE FAIL ELECTRONIC CONTROL MODULE OR INJECTOR 10 NO START 11 Open Grounded circuit 10 Grounded circuit 11 Short to 12 voits Voltage will vary with engine revolutions per minute Depending on octane adjust potentiometer trim 7 Battery voltage with engine Less than 0 50 volts warm Less than 0 10 volts 8 Open B Should equal battery voltage VAZ SERVICE MANUAL THROTTLE 8ODY INJECTION NIVA 168 ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION 2 119 SECTION 2 9C chart 10 Chart Chart C 2C Chart C 3 Chart C 4 Chart 48 Chart cac Chart C 9 Ghart C 10 Chart C 13 Chart C 15 COMPONENT S
9. ENGINE IDUNG CONNECT TECH4 SCAN TOOL SELECT FO DATAUST DOES TECH 1 DISPLAY OCTANE ADJUST VOLTS BETWEEN 1 0 AND 4 2 ANO DEGREES OF RETARD BETWEEN AND 87 WHILE OBSERVING TECH 1 SLOWLY TURN OCTANE ADJUST POTENTIOMETER ADJUSTMENT SCREW DOES VOLTAGE DISPLAYED ON TECH 1 RESPOND TO THE ADJUSTMENT SCREW MOVEMENT CHECK FOR CODE 54 USING TECH ORE PROCEEDING THE POTENTIOMETER IS SET AT TH FACTORY AT ABOUT CHECK FOR CODE S4 3 VOLT NO RETARD ON SYSTEM DIAGNOSTIC CHART FOR ENGINE IDUNG ON TECH 1 SELECT MISC TESTS THEN ADDITION INFORMATION SELECT OCTANE ADJUST BEFORE YOU PROCEED YOU MUST GET TO THE OCTANE ADJUST MODE IN THE TECH 1 TO DO THIS YOU MUST PRESS THE EXIT BUTTON SELECT MISC TEST ANO THEN OUTPUT TESTS NOW SELECT OCTANE ADJUST AND PROCEED TURN ADJUSTMENT SCREW UNTIL DESRED VOLTAGE AMOUNT OF RETARD 15 REACHED TOO MUCH RETARD CAN RESULT IN POOR PERFORMANCE AND FUEL ECONOMY IT S CAUSE OF THIS THAT ONLY SMALL ADJUSTMENTS SHOULD BE MADE ANY ONE TIME TO THE POTENTIOMETER MAKING SMALL ADJUSTMENTS AND RETURNING THE VEHICLE TO THE OWNER ALLOWS IT TO BE TEST DRIVEN IN A VARIETY OF SITUATIONS IF THE VEHICLE tS RETURNED FOR A SIMILAR COMPLAINT READJUST THE POTENTIOMETER AGAIN MAKING SURE NOT OVER ADJUST 2 8 93 NS 15202 AFTER REPAIRS START
10. VAZ SERVICE MANUAL THROTTLE 8ODY INJECTION NIVA TS E 2 128 ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION FUSE Y GREEN 14 PINK BLACK ELECTRONIC CONTROL MODULE 21 BROWN 4 IGNITION SWITCH 15 PINK BLACK VOLTAGE INPUT SIGNAL VP CONNECTOR V 1 1 i TAGHO ELECTRONIC SPARK 39 GREEN WHITE TIMING OUTPUT 40 BLACK WHITE os BYPASS MODE CONTROL 42 VIOLETAWHITE 85 REFERENCE INPUT SIGNAL 58 BLACK RED 83 REFERENCE Low 66 WHITE CRANKSHAFT 67 BROWN SENSOR COL ASSEMBLES DIRECT IGNITION SYSTEM MODULE CHART C 4 Page 1 of 2 IGNITION SYSTEM CHECK NO SPARK 1 7L THROTTLE BODY INJECTION NIVA Circuit Description The direct ignition system uses a waste spark method of distribution In this type of system the ignition module triggers the correct ignition coil based on signals from the crankshaft sensor Each ignition coil provides the high sec ondary voltage required to fire two spatk plugs at the same time on companion cylinders i c cylinders with pis tons at the top of their stroke top dead center at the same time One of these pistons would be at the top of its com ptession stroke the other piston would be at the top of its exhaust stroke Test Description Number s below refer to circled 3 This test will determine if a good ground is avail number s on the diagnostic chart able at the ignition module 1 Becasue the direct ignition system uses two plugs 4 oe for t of the crank
11. small hose which will be experi encing high vacuum Under heavy load or wide open throttle conditions a small amount of crankcase vapors are passed through the primary system orifice However most vapors pass through the secondary system large hose into the air cleaner through the throttle body injection and are bumed in the combustion chamber RESULTS OF INCORRECT OPERATION A plugged hose may cause Higher than normal idle air control steps teaks e Oilin air cleaner Sludge in engine VAZ SERVICE MANUAL THROTTLE BODY INJECTION NIVA 194 lt m f 33 ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION 2 145 CHART C 13 CRANKCASE VENTILATION SYSTEM CHECK 1 7L THROTTLE BODY INJECTION NIVA DIAGNOSIS FUNCTIONAL CHECK OR VENTILATION SYSTEM There are no moving parts in the ventilation system Mainte nance consists of inspecting the hoses to make sure they are clear and in good operating condition The vacuum orifice in the mani fold should be inspected on a regular basis to be sure it is not plugged and cleaned if necessary Proper operation of the ventilation system is dependent upon a sealed engine If oil sludging or dilution is noted and the ventilation system is functioning properly check engine for possible cause and correct to ensure that system will function as intended VAZ SERVICE MANUAL THROTTLE 80DY INJECTION NIVA 2 146 ENGINE MANAGEMENT SYSTEMS 1
12. CABLE OF THE AFFECTEO COIL AT SPARK PLUG SPARK SHOULD JUMP SECONDARY IGNITION VOLTAGE IGNITION TESTER GAP WHILE CRANKING ENGINE DOESIT 1 CONTINUE TO 1 REPLACE THE SPARK PLUG FOR THE CABLE WHICH rPAGE2ZOFZ WAS TO GROUND I MISFIRE 15 STILL a PRESENT START MISFIRE TEST AGAIN AT STEP 1 CAUTION when handling secondary spark plug cables with engine running insulated pliers must be used and care exercised to prevent a possible electrical shock 4 27 33 AFTER REPAIRS START ENGINE CLEAR CODES AND CONFIRM NO CHECK ENGINE LIGHT NS 15804 VAZ SERVICE MANUAL THROTTLE BODY INJECTION NIVA 2 134 ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION FUSE Y GREEN COIL ASSEMBUES 14 PINK BLACK 21 BROWN 15 PINK BLACK CONNECTOR uwi h yj 86 PINK BLACK 39 GREEN WHITE 40 BLACK WHITE 42 VIOLET WHITE 58 BLACK RED CRANKSHAFT SENSOR DIRECT IGNITION SYSTEM MODULE CHART C 4B Page 2 of 2 ELECTRONIC CONTROL MODULE IGNITION SWITCH VOLTAGE INPUT SIGNAL ELECTRONIC SPARK TIMING OUTPUT DS eypass MODE CONTROL 55 REFERENCE INPUT SIGNAL 53 REFERENCE Low DIRECT IGNITION SYSTEM MISFIRE AT IDLE 1 7L THROTTLE BODY INJECTION NIVA Circuit Description The direct igni on system uses a waste spark method of distribution In this type of system the ignition module triggers the 1 4 coil pai
13. CHART C4 PAGE 2 OF 2 YES ro 3 CONNECT TEST LIGHT TO BATTERY VOLTAGE AND DIRECT IGNITION SYSTEM MODULE 2 PIN CONNECTOR HARNESS TERMINAL A P FAULTY CONNECTION OR OPEN CIRCUIT 15 86 15 TEST LIGHT ON PINK BLACK WIRE vts DISCONNECT 3 WA Y CONNECTOR FROM DIRECT IGNITION SYSTEM FAULTY CONNECTION MODULE OR OPEN CIRCUIT 21 4 WITH OHMMETER PROBE HARNESS TERMINALS 8 AND OF 3 WAY BROWN WIRE HARNESS CONNECTOR SHOULD READ BETWEEN 500 700 5 SET DIGITAL VOLTMETER J 39689 ON AC VOLTAGE POSITION LEAVE METER LEADS CONNECTED TO 3 WAY HARNESS CONNECTOR AS IN STEP 4 LESS THAN CRANK ENGINE AND OBSERVE VOLTAGE READING READING SHOULD BE GREATER THAN 500 OHMS 0 3 VOLT 300 mv SENSOR OPEN SENSOR LEADS CIRCUIT 67 SHORTED BROWN WIRE TOGETHER OR OR CIRCUIT 68 FAULTY WHITE WIRE CRANKSHAFT ORFAULTY POSITION CONNECTION SENSOR ORFAULTY CRANKSHAFT POSITION SENSOR FAULTY CONNECTION OR FAULTY DIRECT IGNITION SYSTEM MODULE FAULTY CONNECTION OR FAULTY CRANKSHAFT POSITION SENSOR 2 8 93 AFTER REPAIRS START ENGINE CLEAR CODES AND CONFIRM NO CHECK ENGINE LIGHT NS 14979 VAZ SERVICE MANUAL THROTTLE BODY INJECTION NIVA 2 130 ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECHON Fuse Y GREEN ELECTRONIC CONTROL MODULE 14 PINK BLACK
14. ENGINE CLEAR CODES AND CONFIRM NO CHECK ENGINE LIGHT VAZ SERVICE MANUAL THROTTLE BODY INJECTION NIVA
15. IOLE SPEED THROUGH RANGE FROM 700 REVOLUTIONS PER MINUTE UP TO 1500 REVOLUTIONS PER MINUTE ENGINE SPEED SHOULD FOLLOW THE COMMANDED IDLE SPEED Tu OOES m mo s m DISCONNECT HARNESS CONNECTOR FROM THE IDLE AIR IGNITION OFF 7 CONTROL VALVE INSTALL HARNESS CONNECTOR DISCONNECT THE HARNESS CONNECTOR INTO NODE LIGHT FROM TESTER KIT 222 DM FROM THE IOLE AIR CONTROL VALVE ENGINE RUNNING USING TECH 1 COMMAND THE USING THE DIGITAL VOLT OHM AMP DESIRED IOLE 5 THROUGH RANGE UP AND DOWN MULTIMETER J 39689 CHECK RESISTANCE EACH NODE LIGHT SHOULD FLASH REO AND GREEN BUT ACROSS IDLE AIR CONTROL VALVE COILS NEVER OFF SHOULO BE 40 TO 80 OHMS BETWEEN IOLE DO THEY AIR CONTROL VALVE TERMINALS A TO 87 F AND C TO D e NO FAULTY IDLE AIR CONNECT TOOL CHECK RESISTANCE BETWEEN REPLACE IOLE CONTROL VALVE 139763 CT 222 MOTOR AIR CONTROL VALVE Al CONTROL CONNECTOR TESTER CLIP LEADS TO VEHICLE TERMINALS 787 AND VALVE TERMINAL AATIERY THEN CONNECTITS AND 7D RETEST CONTACTS CONNECTOR TO THE IDLE AIR SHOULD SE INFINITE NO OPEN IOLE AIR CONTROL VALVE CONTINUITY OPEN CIRCUIT INCLUDING DM SWITCH HIGH ANO LOW CONMECTORS ENGINE SPEED SHOULD INCREASE IDLE AIR CONTROL DECREASE 5 TOOL SWITCH CIRCUITS SHORTED 15 MOVED TO GROUND OR DOES m VOLTAGE x FAULTY ELECTRONIC CONTROL MODULE T CONNECTIONS R so
16. Scan tool indicates a very high coolant temperature and the System is running LEAN Check the cooling system and cooling fan for proper operation L FUEL SYSTEM lt CHECK For proper fuel cap CHECK Fuel pressure use CHART 7 NOTICE If test shows excessive oxides of nitrogen clieck it ms which cause vehicle to run LEAN or too hot i CHECK Canister for fuel loading Refer to CHART C 3 U l l Il l UU IGNITION SYSTEM Ignition system for Proper ignition voltage output with spark tester J 26792 ST 125 Spark plugs wet plugs cracks wear improper gap burned electrodes or heavy deposits Spark plug leads wires for excessive resistance Bare and shorted wires m Crankshaft sensor resistance and connections d Loose ignition coil connections ADDITIONAL CHECKS 8 CHECK For vacuum leaks CHECK Carbon build up in combustion chambers CHECK Crankcase ventilation system for proper operation see CHART C 13 Es VAZ SERVICE MANUAL THROTTLE BODY INJECTION NIVA 2 112 ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION DIESELING RUN ON Definition Engine continues to run after key is turned off but runs very roughly If engine runs smoothly check ignition switch and adjust ment and short to voltage on ignition switch voltage input circuit PRELIMINARY CHECKS ay e
17. VOLTAGE IGNITION TESTER GAP ON ALL CABLES WITH ENGINE IOLING 01017 WITH IGNITION OFF USE CONNECTOR TERMINAL CHECK FOR TEST ADAPTER J 35616 GROUND THE OPPOSITE FAULTY WORN OR CRACKED SPARK PLUG S PLUG CABLE OF THE AFFECTED COIL AT SPARK PLUG PLUG FOULING QUE TO ENGINE MECHANICAL FAULT SPARK SHOULD JUMP SECONDARY IGNITION VOLTAGE IF SPARK PLUGS CHECK OUT OK SEE CUTS OUT IGNITION TESTER GAP WHILE CRANKING ENGINE MISSES IN SYMPTOMS SECTION 72 87 DOES IT CHECK THE RESISTANCE OF EACH PLUG CABLE OF THE REPLACE THE SPARK PLUG FOR THE CABLE WHICH COIL WHICH DID NOT FIRE THE SECONDARY IGNITION WAS JUMPERED TO GROUND IF MISFIRE 15 STILL VOLTAGE IGNITION TESTER PRESENT START MISFIRE TEST AGAIN AT 5 1 CABLE RESISTANCE SHOULD BE LESS THAN 15 000 p OHMS EACH AND CABLES SHOULD NOT BE GROUNDED ARE CABLES OK REMOVE COIL RETAINING NUTS AND REMOVE COILS REPLACE FAULTY CABLE S COILS SHOULD BE FREE OF CARBON TRACKING ARE THEY SWITCH A NORMALLY OPERATING COIL WITH THE REPLACE IGNITION COW ALSO CHECK FOR COIL FROM PROBLEM CYLINDER FAULTY PLUG CABLE CONNECTIONS AND SPARK SHOULD JUMP SECONDARY IGNITION CABLE NIPPLES FOR CARBON TRACKING VOLTAGE IGNITION TESTER GAP WITH ENGINE IDLING DOIT ORIGINAL IGNITION REPLACE ELECTRONIC CON IS FAULTY IGNITION MODULI CAUTION When handling secondary spark plug cables with engine running insulated pliers must be used
18. and care exercised to prevent a possible electrical shock AFTER REPAIRS START ENGINE CLEAR CODES AND CONFIRM NO CHECK ENGINE LIGHT VAZ SERVICE MANUAL THROTTLE BODY INJECTION NIVA 188 2 138 ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION FUSER BLACK 76RED MAXIFUSE 77 RED INTAKE MANIFOLD HEATER RELAY black relay connector INTAKE MANIFOLD ELECTRIC HEATER Located under intake manifold HEATING ELEMENT ELECTRONIC CONTROL MODULE PINK BLACK ee INTAKE MANIFOLD ELECTRIC HEATER RELAY CONTROL 9 15 92 NS 14402 CHART C 9 Page 1 of 2 INTAKE MANIFOLD ELECTRIC HEATER 1 7L THROTTLE BODY INJECTION NIVA Circuit Description To assist in cold driveability the electronic control module controls a positive temperature coefficient heater This electric heating element is tumed by the electronic control module by supplying a ground to a control relay at the electronic control module s terminal C2 The relay completes the circuit and supplies voltage from a 50 amp maxi fuse to the heater The heating element self current limiting as its temperature increases its resistance increases preventing ther mal overheat and possibie resultant short to ground The electronic control module switches ON the heater based upon various inputs and conditions e Coolant temperature sensor is less than 63 C Engine is running Intake air temperature is less than
19. number s on the diagnostic chart age from the potentiometer any time the ignition is P ON This can be observed using Tech 1 in the F l Checks to make sure a possible Code 54 is not set DATA LIST mode when the engine is running 2 Checks operation of the potentiometer 3 Describes adjustment procedures and precautions However changes to the amount of spark retard based on the potentiometer input signal will only take effect when the Tech 1 tool is used in the Miscella neous Tests Octane Adjusunent mode VAZ SERVICE MANUAL THROTTLE BODY INJECTION NIVA ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION 2 147 CC SEM PERO TITLE BODY INJECTION 2 147 CHART C 15 OCTANE ADJUSTMENT POTENTIOMETER CHECK 1 7L THROTTLE BODY INJECTION NIVA IF CODE 54 15 DETECTED REPAIR THE PROBLEM THAT CAUSED THE COOE 54 BEFORE USING THIS PROCEDURE NOTICE THE OCTANE ADJUST POTENTIOMETER IS PRESET AT THE FACTORY FOR THE USE OF HIGH OCTANE FUEL IN MOST CASES IT WILL NOT NEED TO BE ADJUSTED DURING THE LIFE OF THE VEHICLE THERE ARE ONLY TWO TIMES WHEN AN ADJUSTMENT SHOULD MADE 1 WF THE CUSTOMER HAS COMPLAINED OF DETONATION 2 iFTHE CUSTOMER HAS REQUESTED AN ADJUSTMENT TO COMPENSATE FOR THE ANTICIPATED USE OF LOW OCTANE FUEL VF AN ADJUSTMENT IS BEING MADE FOR REASONS OTHER THAN THOSE LISTED ABOVE THEN THE ADJUSTMENT IS NOT NECESSARY AND YOU SHOULD NOT PROCEED WITH THIS CHART
20. oR i IGNITION MODULE TERMINALS WHICH CONNECT TO FAULTY IGNITION CO IGNITION COIL PRIMARY TERMINALS 4 CRANK THE ENGINE WHILE OBSERVING TEST LIGHT DOES TEST LIGHT BLINK ves mE FAULTY IGNITION COIL TERMINAL CONNECTIONS FAULTY IGNITION MODULE OR FAULTY IGNITION 1 27 91 TER REPAIRS START ENGINE CLEAR CODES AND CONFIRM NO CHECK ENGINE LIGHT N 15201 VAZ SERVICE MANUAL THROTTLE BODY INJECTION Niv A 2 132 ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION FUSE Y GREEN ELECTRONIC CONTROL MODULE 14 PINK BLACK 21 BROWN 4 15 PINK BLACK CONNECTOR 4 B6 PINK BLACK IGNITION SWITCH VOLTAGE INPUT SIGNAL ELECTRONIC SPARK TIMING OUTPUT S 55 move CONTROL REFERENCE INPUT SIGNAL nerenence tow 39 GREEN WHITE 40 BLACK WHITE 42 VIOLETANHITE 58 BLACK RED CRANKSHAFT SENSOR OIL ASSEMBUES DIRECT IGNITION SYSTEM MODULE CHART C 4B Page 1 of 2 DIRECT IGNITION SYSTEM MISFIRE AT IDLE 1 7L THROTTLE BODY INJECTION NIVA Circuit Description The direct ignition system uses waste spark method of distribution In this type of system the ignition module triggers the 1 4 coil pair resulting in both 1 and 4 spark plugs firing at the same time 1 cylinder is on the com pression stroke at the same time 4 is on the exhaust stroke result
21. routing of plug wires Refer to Engine Manual ENGINE MECHANICAL Perform a compression check Refer to Engine Manual 2 Valve timing Remove rocker cover Check for wom rocker arms broken or weak valve springs wom camshaft lobes or misadjusted valve clearances 2 Intake manifold gasket for v cuum leaks Intake and exhaust manifolds for casting flash EMO EM E VAZ SERVICE MANUAL THROTTLE 80DY INJECTION NIVA 553 2 114 ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION 164 CHART B 1 RESTRICTED EXHAUST SYSTEM CHECK CHECK AT OXYGEN SENSOR Carefully remove oxygen sensor Install exhaust backpressure tester BT 8515 V or equivalent in place of oxygen sensor see illustration After completing test described below be sure to coat threads of oxygen sensor with anti seize compound or equivalent prior to re installation 1 BACK PRESSURE GAGE 2 OXYGEN SENSOR 025 3 EXHAUST MANIFOLD 75 3338 6E DIAGNOSIS With the engine at normal operating temperature and running at 2500 revolutions per minute observe the exhaust system backpressure reading on the gauge If the pressure exceeds 1 1 4 psi 8 62 kPa a restricted exhaust system is indicated Inspect the entire exhaust system for a collapsed pipe heat distress or possible internal muffler failure If there are no obvious reasons for the excessive backpressure a restricted catalytic converter should be suspected and replaced using curr
22. the factory this adjustment was initially set for premium octane fuel If low octane fuel is to be used on a regular basis it is advisable to readjust the octane adjustment potentiometer Use CHART C 15 THERMOSTATIC AIR CLEANER Ensure that the thermostatic air cleaner functions properly Check that the temperature actuated damper moves away from HOT AIR position after the engine is fully warmed up Use the Tech 1 Scan tool to observe intake air temperature after the engine is fully warmed up At road speeds the intake air temperature should be close to ambient air temperature VAZ SERVICE MANUAL THROTTLE BODY INJECTION NIVA EE ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION 2 105 EERE STEMS 1 70 TERO TILE BODY INJECTION 2 105 DETONATION SPARK KNOCK Page 2 of 2 Definition mild to severe ping usually worse under acceleration The engine makes sharp metallic knocks that change with throttle opening IGNITION SYSTEM Spark plugs for proper heat range ENGINE MECHANICAL For carbon buildup For incorrect basic engine parts such as cam heads pistons etc For excessive oil entering combustion chamber ADDITIONAL CHECKS For correct engine calibrator see Service Bulletins For intake manifold electric heater should be OFF with the engine fully warmed up Use Tech 1 to display MANIFOLD HEATER ON OFF status VAZ SERVICE MANUAL THROTTLE BODY I
23. ves 3 REPLACE ELECTRONIC CHECKIOLE AiR CONTROL MODULE PASSAGES IN THROTTLE REPAIR AS BODY UNIT OK NECESSARY ANO REPLACE IDLE AIR RETEST CONTROL VALVE Lond CONTROL CIRCUITS WITH ENGINE IDLING CYCLE 222 IDLE AIR CONTROL VALE REPLACE IOLE AND CIRCUITS ARE OK AIR CONTROL REFER TO DIAGNOSTIC VALVE ANO AIOS ON FACING PAGE RETEST m AFTER ALL IDLE AIR CONTROL TESTING IS COMPLETE RESET THE IDLE AIR CONTROL VALVE CONNECT TECH 1 SCAN TOOL SELECT MISC TEST THEN IDLE SYSTEM THEN IDLE RESET 25 93 AFTER REPAIRS START ENGINE CLEAR CODES AND CONFIRM NO CHECK ENGINE LIGHT NS 14395 SERVICE MANUAL THROTTLE BODY INJECTION NIVA 175 2 126 ENGINE MANAGEMENT SYSTEMS 1 71 THROTTLE BODY INJECTION ELECTRONIC CONTROL MODULE PULSE WIDTH MODULATED CANISTER CONNECTOR front face view NORMALLY CLOSED No flow when not energized PULSE WIDTH MODULATED CANISTER CONTROL SOLENOID 41 GREEN YELLOW 26 PINK BLACK FUSE R BLACK 25 PINK BLACK 9 15 92 NS 14396 CHART C 3 CANISTER PURGE VALVE CHECK 1 7L THROTTLE BODY INJECTION NIVA Circuit Description Canister purge is controlled by a solenoid that allows manifold vacuum to purge the canister when energized The electronic control module supplies a ground to energize the solenoid purge The purge solenoid controlled by the electronic control module is pulse width modulated tu
24. 7L THROTTLE BODY INJECTION ELECTRONIC CONTROL MODULE 59 GREEN 5 VOLTS OCTANE ADJUSTMENT POTENTIOMETER INPUT SIGNAL 75 97 2 7 1 MANIFOLD ABSOLUTE 1 i PRESSURESENSOR 61 BLACK 69 BLACK SENSOR 7 GROUND OCTANE ADJUSTMENT POTENTIOMETER OCTANE ADJUST POTENTIOMETER Pony i 9 15 92 face view NS 14372 CHART C 15 OCTANE ADJUSTMENT POTENTIOMETER CHECK 1 7L THROTTLE BODY INJECTION NIVA System Description The octane adjustment potentiometer is a dealer only adjustment that compensates for the use of low octane fuel The potentiometer is adjustable from about 1 to 4 5 volts and 0 to 8 degrees of retard Any voltage adjustments that are made at the potentiometer provide a corresponding change in degrees of retard at the ignition system provided the Tech 1 Scan tool is installed and in the Octane Adjust mode Abnormally High more than 4 9 volts or abnormally low less than 0 50 volts voltage readings will cause a Code 54 While the Code 54 problem is present the Check Engine light will remain ON when the engine is running At the same time the electronic control mod ule will use a substitute value of degrees of retard until the problem is corrected No attempts at adjusting the Octane Adjust potentiometer should be made if a Code 54 is present Test Description Number s below refer to circled NOTE The electronic control module monitors the volt
25. 80 C Battery voltage is greater than 8 volts Once the heater has been ON the electronic control module will tum it OFF if the following conditions exist Battery voltage is less than 6 volts Heavy electrical accessory load Coolant temperature sensor input is greater than 65 C Test Description Numbers below refer to circled numbers on the diagnostic chart 1 By using the Tech 1 Scan too this quick check of the intake manifold heater can be performed See Diagnostic Aids 2 This step checks for power on relay control and load circuits Diagnostic Aids With ignition ON engine running use Tech 1 OUTPUT TEST to tum ON heater Observe Sys tem Voltage on Tech 1 System voltage should drop at least 0 3 volts with heater ON Engine must be idling for this Tech 1 command to take effect VAZ SERVICE MANUAL THROTTLE BODY INJECTION NIVA ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION 2 139 gt L THROTTLE BODY INJECTION 2 139 CHART C 9 Page 1 of 2 INTAKE MANIFOLD ELECTRIC HEATER m 1 7L THROTTLE BODY INJECTION NIVA CONNECT TECH 1 SELECT MISCELLANEOUS TESTS THEN OUTPUT TESTS THEN MANIFOLD RELAY WITH ENGINE IDLING OBSERVE SYSTEM VOLTAGE WHILE MANIFOLD RELAY IS CYCLED ON AND OFF USING TECH 1 i 9 SYSTEM VOLTAGE SHOULD DECREASE BY AT LEAST 0 3 VOLTS WHEN i MANIFOLD HEATER 15 ON DOES m IGNITION ON
26. D TO BATTERY VOLTAGE PROBE 2 PIN AIR CONDITIONING HARNESS CONNECTOR USING TECH 1 SCAN TOOL ENABLE OUTPUT TEST AGAIN IS TEST UGHT FAULTY CONNECTION OPEN OR HORTTO OR SHORT TO GROUND GROUND IN AIR ORCUN 85 SLUE WIRE CONDITIONING BETWEEN 2 PIN AIR HARNESS PRIOR CONOITIONING HARNESS CONDITIONING HARNESS TO THS CONNECTOR AND ELECTRONIC CONNECTOR AND CONNECTOR CONTROL MODULE TERMINAL ELECTRONIC CONTROL KX MODULE TERMINAL D12 OR FAULTY ELECTRONIC OR FAULTY ELECTRONIC CONTROL MODULE CONTROL MODULE 2 SERVICE MANUAL THROTTLE BODY INJECTION 2 144 ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION 1 PRIMARY CIRCUIT 2 SECONDARY CIRCUIT 3 OIL SEPARATOR 4 CRANKCASE VAPORS 5 COMBUSTION CHAMBER CHART C 13 CRANKCASE VENTILATION SYSTEM CHECK 1 7 THROTTLE BODY INJECTION System Description The crankcase ventilation system has 2 circuits In both circuits crankcase vapors retumed to the combustion chamber through an oil separator located on the engine block near the ignition module The primary circuit consists of a calibrated orifice fitted into the intake manifold just below the throttle body injection unit A small hose runs from this orifice to the oil separator A larger secondary circuit hose runs from the air cleaner to the oil separator At idle all crankcas vapors are directed through the primary circuit orifice
27. E MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION 2 109 ROUGH UNSTABLE OR INCORRECT IDLE STALLING Page 1 of 2 Shake Also the engine idle speed may vary called hunting Either condition may be severe enough to cause stalling Engine idles at incorrect speed PRELIMINARY CHECKS Perform the carefu visual physical checks as described at start of Symptoms in this section SENSORS CHECK Throttle position sensor Use CHART C 1H CHECK Coolant temperature sensor Using a Tech 1 Scan tool compare coolant temperature with ambient temperature on a cold engine lf coolant temperature reading 2 C greater than or less than ambient air temperature Check for high resistance in coolant temperature sensor circuit or sensor itself Compare resistance value to Diagnostic Aids on Code 14 and Code 15 chart CHECK Manifold absolute pressure sensor response and accuracy manifold absolute pressure sensor vacuum hose use CHART C 1D FUEL SYSTEM CHECK Evaporative Emission Control System Use CHART C 3 CHECK Injector for leaking Energize fuel system by either turning the ignition key to the ON position which will pressurize the fuel system for 2 seconds by applying battery voltage to the fuel pump test terminal Assembly line data link terminal G Applying battery voltage will force the fuel pump to run until the battery voltage is removed Visually check injector and thro
28. ECT A HAND VACUUM PUMP TO MANIFOLD ABSOLUTE PRESSURE SENSOR START ENGINE NOTE MANIFOLD ABSOLUTE PRESSURE SENSOR VOLTAGE APPLY 0 34 BAR 10 Hg OF VACUUM NOTE VOLTAGE CHANGE m SUBTRACT SECOND READING FROM THE FIRST VOLTAGE DIFFERENCE VALUE SHOULD BE GREATER THAN 1 5 VOLTS 577 G NO TROUBLE FOUND CHECK SENSOR VACUUM SOURCE FOR P RERO LEAKAGE OR RESTRICTION BE SURE THIS SOURCE SUPPLIES i VACUUM MANIFOLD ABSOLUTE PRESSURE SENSOR ONLY HOT STAMPED NUMBER m d COLOR KEYED INSERT m Figure 1 Typical Key Insert figure 2 Typical Hot Stamped Number AFTER REPAIRS START ENGINE CLEAR CODES AND CONFIRM NO CHECK ENGINE LIGHT VAZ SERVICE MANUAL THROTTLE BODY INJECTION NIVA 2 122 ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION ELECTRONIC m o 1 ABSOLUTE MANIFOLD CONTROL MODULE THROTTLE POSITION SENSOR SENSOR CONNECTOR WIDE OPE fi front face view WIDE 5 VOLTS REFERENCE THROTTLE POSITION INPUT SIGNAL SENSOR GROUND CHART C 1H THROTTLE POSITION SENSOR OUTPUT CHECK 1 7L THROTTLE BODY INJECTION Circuit Description The throttle position sensor is attached to the throttle body and is internally rotated by the throttle body shaft It is a potentiometer with one end connected to 5 volts from the electronic control module and the other to electronic con trol module ground A third wire is connected to the electronic control modul
29. ECT TECH 1 SCAR TOOL SELECT FG DATA LIST THROTTLE CLOSED IGNITION ON ENGINE RUNNING WHAT THE THROTTLE POSITION VOLTAGE READING ON THE TECH 1 WITH THE TECH 1 SCAN TOOL STILL CONNECTED DISCONNECT THROTTLE POSITION SENSOR MONITOR THE THAOTTLE POSITION VOLTAGE AS THE AND RECHECK TECH 1 THROTTLE POSITION THROTTLE IS SLOWLY AND STEADILY OPENED TOA VOLTAGE AS LISTED IN STEP 1 WIDE OPEN POSITION VOLTAGE SHOULD INCREASE AT A STEADY RATE WITH NO SUDOEN CHANGES If VOLTAGE DOES NOT IMMEDIATELY FOLLOW THROTTLE MOVEMENT SENSOR IS FAULTY REPAIR SHORT TO TERMINAL 8 TO ELECTRONIC CONTROL MODULE TERMINAL A117 F OK REPLACE THROTTLE POSITION SENSOR CONTROL MODULE TERMINAL C137 VOLTAGE AT THE WIDE OPEN THROTTLE POSTION HELPER CHECK THAT THE THROTTLE VALVE IS FULLY DREN WHEN ACCELERATOR PEDAL IS FULLY DEPRESSED QE THROTTLE VALVE DOES MOT FULLY OPEN WHEN PEDAL IS DEPRESSED CHECK FOR EXTRA FLOOR MATS OR CARPET UNDER ACCELERATOR PEDAL ADIUST THROTTLE CABLE TO ASSURE FULL TRAVEL AND A SUGHT SLACK AT CLOSED THROTTLE NOLE 9 17 92 TAFTER REPAIRS START ENGINE CLEAR CODES AND CONFIRM NO CHECK ENGINE UGHT NS 14381 VAZ SERVICE MANUAL THROTTLE 8ODY INJECTION NIVA 323 2 124 ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION IDLE AIR CONTROL VALVE CONNECTOR front face view IDLE AIR CONTROL VALVE ELECTRONIC CONTROL MODULE
30. ECTION 2 141 CHART C 9 Page 2 of 2 INTAKE MANIFOLD ELECTRIC HEATER 1 7L THROTTLE BODY INJECTION NIVA CONTINUED FROM i PAGETOF2 4 DISCONNECT MANIFOLD HEATER ELECTRICAL CONNECTOR PERFORM NEXT STEP WITH HEATER AT ROOM TEMPERATURE USING DIGITAL OHMMETER MEASURE RESISTANCE FROM HEATER CONNECTOR TO ENGINE BLOCK SHOULD BE BETWEEN 0 3 AND 0 5 OHMS 15177 vi vo IF REMOVED AT PREVIOUS STEP REINSTALL HEATER INTO INTAKE MANIFOLD CHECK INTAKE MANIFOLD HEATER HOLD RECONNECT HEATER ELECTRICAL CONNECTOR DOWN BOLTS FOR CORROSION ALSO USING DIGITAL OHMMETER MEASURE RESISTANCES BETWEEN RELAY INSURE THAT THEY ARE TIGHT RECHECK CONNECTOR TERMINAL 2 AND ENGINE SLOCK GROUND RESISTANCE If STILL OVER SPECIFICATION RESISTANCE SHOULD NOT BE ZERO AND SHOULD BE APPROXIMATELY THE REPLACE INTAKE MANIFOLD HEATER SAME AS MEASURED IN STEP 3 RECHECK RESISTANCE IF STILL OVER WHAT I THE RESISTANCE SPECIFICATION REPLACE INTAKE MANIFOLD HEATER APPROXIMATELY SAME AS STEP 3 ALMOST ZERO OHMS OPEN CIRCUIT NO CONTINUITY N Oo CONNECT TEST LIGHT BETWEEN 12 VOLTS AND RELAY CONNECTOR TERMINAL 67 ENGINE IDLING USE TECH 1 OUTPUT TEST TURN ON MANIFOLO HEATER RELAY CONTROL FROM ELECTRONIC CONTROL MODULE TEST LIGHT SHOULD LIGHT DOES IT yes REPLACE RELAY WITH NEW O CONNECT TEST LIGHT BETWEEN 12 VOLTS AND ELECTRONIC CONTROL RELAY AND RET
31. EST AT STEP 1 MODULE TERMINAL C2 ENGINE IDLING USE TECH 1 OUTPUT TEST TO TURN ON AND OFF MANIFOLD HEATER RELAY CONTROL 4 TEST LIGHT SHOULD TURN OFF WHAT DOES TEST LIGHT DO TURNS ON AND OFF STAYS ONT REPAIR OPEN CIRCUIT 80 REPAIR SHORT TO GROUND REPLACE ELECTRONIC PINK BLACK WIRE IN CIRCUIT 80 PINK BLACK CONTROL MODULE BETWEEN ELECTRONIC WIRE BETWEEN ELECTRONIC CONTROLMODULE CONTROL MODULE AND RELAY CONNECTOR RELAY CONNECTOR REPAIR SHORT TO GROUND IN CIRCUIT 79 BLACK WIRE BETWEEN HEATER CONNECTOR ANO RELAY CONNECTOR REPAIR OPEN CIRCUIT IN BLACK WIRE BETWEEN HEATER CONNECTOR ANO BLACK RELAY CONNECTOR TERMINAL 2 113 92 NS 13532 VAZ SERVICE MANUAL THROTTLE BODY INJECTION NIVA E 2 142 ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION AIR CONDITIONING RELAY 4 HIGH ENGINE COOLANT TEMPERATURE SWITCH HIGH LOW PRESSURE SWITCH AIR CONDITIONING RELAY 3 AIR CONDITIONING RELAY 2 CONDENSER FAN ELECTRONIC CONTROL MODULE 2 PIN AIR CONDITIONING HARNESS CONNECTOR 0 AIR CONDITIONING REQUEST AIR CONDITIONING CLUTCH 85 BLUE ELECTRONIC CONTROL MODULE 5 29 92 NS 14679 CHART C 10 AIR CONDITIONING COMPRESSOR CLUTCH CONTROL 1 7L THROTTLE BODY INJECTION NIVA Circuit Description A request for air conditioning is sensed by nal B8 When the elect
32. ION NIVA NE We Tu Ei ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION 2 107 1 1 THROTTLE BODY INJECTION 2 107 CUTS OUT MISSES Definition Steady pulsation or Jerking that follows engine speed usually more pronounced as engine load increases The exhaust has a Steady spitting sound at idle or low speed PRELIMINARY CHECKS e Perform the careful visual physical checks as described at start of Symptoms in this section IGNITION SYSTEM CHECK Forcylinder miss by 1 Start engine allow engine to stabilize then disconnect idle air Control motor Remove one spark plug wire at a time using insulated pliers 2 If there is a revolutions per minute drop on all cylinders equal to within 50 revolutions per minute go to Rough Unstable Or Incorrect Idle Stalling symptom Reconnect idle air control motor 3 If there is no revolutions minute drop on one or more cylinders or excessive variation in drop check for spark on the suspected cylinder s with J 26792 ST 125 Spark Tester If no spark use CHART C 4 If there is spark remove spark plug s in these cylinder s and check for Insulation Cracks Wear Improper Gap Bumed Electrodes Heavy Deposits CHECK Forexcessive spark plug wire resistance NOTICE If the previous checks did not find the problem Visually inspect ignition syst m for moisture dust cracks bums etc
33. MANUAL THROTTLE BODY INJECTION NIVA ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION 2 143 n s FTE THROTTLE BODY INJECTION 2 143 CHART C 10 AIR CONDITIONING COMPRESSOR CLUTCH CONTROL 1 7L THROTTLE BODY INJECTION NIVA THIS CHART ASSUMES THE AIR CONDITIONING SYSTEM IS FULLY CHARGED AND 1 IN PROPER WORKING CONDITION IGNITION ON AIR CONDITIONING SWITCH ON BLOWER CONTROL SWITCH ON HIGH SPEED ENGINE IDLING AT NORMAL OPERATING TEMPERATURE USING TECH 1 SCAN TOOL ENTER MISCELLANEOUS TEST OUTPUT TEST AIR CONDITIONING RELAY THEN ENABLE OUTPUT TEST TO CYCLE RELAY AND OFF DOES AIR CONDITIONING COMPRESSOR CLUTCH ENGAGE AND DISENGAGE PROBLEM IS INTERMITTENT REFER TO INTERMITTENTS IN SECTION 2 USING TECH SCAN Di CONOITIONING REQUEST DISPLAY YES IGNITION OFF DISCONNECT 2 PIN AIR CONDITIONING HARNESS CONNECTOR LOCATED UNDER INSTRUMENT PANEL NEAR FUSE PANEL IGNITION ENGINE IDUNG USING TEST LIGHT 2 34142 8 CONNECTED TO BATTERY VOLTAGE PROBE 2 PIN AIR CONDITIONING HARNESS CONNECTOR A DOES AIR CONDITIONING REQUEST DISPLAY ves FAULTY CONNECTION OPEN OR SHORT TO GROUND IN ORCUTT 14 GREEN WIRE BETWEEN 2 PIN AIR IGNITION OFF DISCONNECT 2 PIN AIR CONDITIONING HARNESS CONNECTOR LOCATED UNDER INSTRUMENT PANEL NEAR FUSE PANEL IGNITION ENGINE IDLING USING TEST LIGHT J 34142 8 CONNECTE
34. NJECTION NIVA 2 106 ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION HESITATION SAG STUMBLE Definition Momentary lack of response as the accelerator is pushed down Can occur at all vehicle speeds Usually most severe when first trying to make the vehicle move as from a stop m sign May cause the engine to stall if severe enough PRELIMINARY CHECKS e Perform the careful visual physical checks as described at start of Symptoms in this section SENSORS e CHECK position sensor Use CHART C 1H CHECK Manifold absolute pressure sensor response and accuracy Use CHART C 1D e CHECK For kinked or leaking vacuum hose between engine and manifold absolute pressure Sensor nn lllLJJlUILLLLLLLLLLeCUCCC ae ge Rena ae a IGNITION SYSTEM m e CHECK Spark plug wires for being faulty e CHECK Spark plugs for being fouled e CHECK Open ignition system ground reference low circuit E gud cras dan E NUN ee i EVAPORATIVE EMISSIONS e CHECK Evaporative emissions storage canister system Use CHART C 3 FUEL SYSTEM e CHECK For restricted fuel filter or improper fuel pressure Use CHART 7 ADDITIONAL CHECKS e CHECK Forcorrect engine calibrator see Service Bulletins e CHECK Altemator output voltage Repair if less than 9 or more than 16 9 volts 24 VAZ SERVICE MANUAL THROTTLE BODY INJECT
35. NK SDACK VOLTAGE INPUT SIGNAL CONNECTOR 13 WHITE 86 PINK BLACK 39 GREEN WHITE ELECTRONIC SPARK TIMING OUTPUT 40 BLACK WHITE os BYPASS MODE CONTROL 42 VIOLETAWHITE 85 REFERENCE INPUT SIGNAL 58 BLACK RED REFERENCE LOW CRANKSHAFT SENSOR COIL ASSEMBUES DIRECT IGNITION SYSTEM MODULE CHART C 4C DIRECT IGNITION SYSTEM MISFIRE UNDER LOAD 1 7L THROTTLE BODY INJECTION NIVA Circuit Description The direct ignition system uses a waste spark method of distribution In this type of system the ignition module iriggers the 1 4 coil pair resulting both 1 and 4 spark plugs firing at the same time 1 cylinder is the com Pression stroke at the same time 4 is on the exhaust stroke resulting in a lower energy requirement to fire 4 spark plug This leaves the remainder of the high voltage to be used to fire 1 spark plug On this application the crankshaft position sensor is mounted to the engine block and protrudes to within approximately 050 of the crankshaft reluctor Since the reluctor is a machined portion of the crankshaft and the crankshaft sensor is mounted in a fixed position on the block timing adjustments are not possible or necessary Test Description Number s below refer to circled A faulty or poor connection at that plug could also numberts on the diagnostic chart result in the miss condition Also check for carbon deposits inside the spark plug boot 3 If carbon tracing is evident rep
36. PRESSURE INPUT SIGNAL SENSOR B ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION 2 117 ELECTRONIC CONTROL MODULE PIN CONNECTOR C SYMPTOMS CHART 32 PIN C D CONNECTOR This electronic control module symptoms chart is for use with a digital voltmeter to further aid in diagnosis The voltages you get may vary due to low battery charge or other reasons but they should be very close BACKPROBE CONNECTORS ONLY THE FOLLOWING CONDITIONS MUST BEFORE TESTING Engine at operating temperature Engine idling For Engine Run column Diagnostic test terminal not grounded 9 Tech 1 Scan tool not installed Air conditioning OFF Digital voltmeter negative lead connected to a good clean ground point NT PIN FUNCTION COMPONE CONNECTOR CAVITY pota INTAKE MANIFOLD n INTAKE MANIFOLD ELECTRIC HEATER HEATER RELAY CONNECTOR 4 RELAY CONTROL IDLE AIR CONTROL GREEN 8 LOW BLACK CONTROL VALVE ZA C4 gt IDLE AIR CONTROL GREEN LE AR NOT STALUNG ROUGH UNSTABLE OR B HIGH WHIT CONTROL VALVE 8 INCORRECT IDLE 9 SEE CHART C 2C STALLING ROUGH UNSTABLE OR DLE POSSIBLE SYMPTOMS FROM FAULTY ORCUIT COLD DRIVEABILITY COMPLAINTS STALLING ROUGH UNSTABLE OR INCORRECT IOLE 9 SEE CHART C 2C t ILE AIR CONTROL LUE TOLE AR COIL A LOW CONTROL VALVE C INCORRECT IDLE 9 SEE CHART 2
37. Perform the careful visual physical checks as described at start of Symptoms in this section FUEL SYSTEM e CHECK Injector for leaking Energize fuel system by either tuming the ignition key to the ON position which will pressurize the fuel system for 2 seconds or by applying battery voltage to the fuel pump test terminal Assembly line data link terminal G Applying battery voltage will force the fuel pump to run until the battery voltage is removed i Visually check injector and throttle body injection assembly for fuel leakage Refer to CHART 7 Fuel System Diagnosis VAZ SERVICE MANUAL THROTTLE 8ODY INJECTION ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION 2 113 BACKFIRE Definition Fuel ignites in intake manifold or in exhaust system making ioud popping noise PRELIMINARY CHECKS Perform the careful visual physical checks as described at start of Symptoms in this section IGNITION SYSTEM Proper ignition coil output voltage with spark tester J 26792 5 125 Spark plugs Remove spark plugs check for wet plugs cracks wear improper gap burned electrodes or heavy deposits repair or replace as necessary For defective insulation on the spark plug wires or boots This would allow high voltage arching to engine parts mostly noticeable during acceleration Forexcessive spark plug wire r sistance For crossfire between spark plug wires proper
38. TURBONutter Lada Niva 4x4 Service Manual Fuel Injection This manual and a host of other wonderful Lada Niva documentation is available free of charge at http www turbo nutter com You can do anything you like with this manual except sell it or otherwise make money from it While can t stop you sticking it on your own website would much prefer you linked to its original location on turbo nutter com You use the information contained with this manual at you own risk If you re not sure how to do something either don t do it or ask Someone who knows about such things The font of all Lada knowledge can be found at http www lada co uk forum For Lada parts advice and general all round Lada wonderfulness these blokes aren t bad Lada UK Ltd Lada Parts Australia P L Askew Rigg 42 Aerodrome Road Troutbeck Caboolture Penrith Cumbria Queensland 11 052 4510 United Kingdom Australia T 44 0 17 6877 9794 T 61 7 5495 5100 F 44 0 17 6877 9197 F 61 7 5495 5152 E alan lada co uk E andy ladaparts com W http www lada co uk W http www ladaparts com E 7 ES mm ENGINE MANAGEMENT SYSTEMS 1 71 THROTTLE BODY INJECTION 2 101 SURGES AND OR CHUGGLES Definition Engine power variation under steady throttle or cruise Feels like the vehicle speeds up and slows down with no change in the accelerator pedal PRELIMINARY CHECKS Perform the careful visual physical checks as described at star
39. WITCH START NO CHECK ENGINE LIGHT NO VOLTAGE INPUT SERIAL DATA 8 FUSE BLOWN 10 SEE SIGNAL DIAGNOSTIC CIRCUIT CH CK ENGINE WILL NOT STOP RUNNING 11 AS SERIAL DATA ASSEMBLY UNE 2 5 NO ASSEMBLY LINE DATA LINK OR WILL COMMUNICATIONS DATA UNK M VARYING VARYING NOT FLASH CODE 12 9 SEE DIAGNOSTIC CIRCUIT CHECK A9 DIAGNOSTIC ASSEMBLY LINE TEST TERMINAL DATA LINK 8 INPUT SIGNAL FLASHES CODES HIGH SPEED FAN 5 ON 19 SEE DIAGNOSTIC CIRCUIT CHECK VEHICLE SPEED VEHICLE SPEED VARIES VARIES ENGINE MAY STALL AT COASTDOWN INPUT SIGNAL SENSOR TECH 1 SCAN VEHICLE SPEED DOES NOT Cool MATCH SPEEDOMETER 3 11 A11 COOLANT HIGH IOLE ROUGH IDLE HARD TO START NO ASSEMBLY LINE DATA UNK OR WILL NOT FLASH CODE 12 8 TEMPERATURE POOR PERFORMANCE EXCESSIVE AND THROTTLE EXHAUST EMISSIONS 8 POSITION SENSOR GROUND A12 ELECTRONIC CONTROL MODULE GROUND A12 O1 OPEN NO START 8 POOR GROUNDS POOR PERFORMANCE SEE DIAGNOSTIC CIRCUIT CHECK ASSEMBLY UNE DATA LINK A 1 Battery voltage for first two 4 Varies With ignition ON reads 9 Open Grounded circuit seconds after ignition is turned barometric pressure With engine 10 Grounded circuit ON without cranking the engine Tunning reads engine load 11 Short to 12 volts When vehicle is stopped vo oltage var
40. With engine running spray plug wires with fine water mist to check for shorts FUEL SYSTEM For contaminated fuel or restricted fuel filter or incorrect fuel pressure Use CHART A 7 ENGINE MECHANICAL CHECK For proper valve timing Remove rocker cover Check for wom rocker arms broken or weak valve springs worn camshaft lobes Repair as necessary Refer to Engine Manual 4 CHECK Low compression Perform compression check Refer to Engine Manual CHECK Intake and exhaust manifold passages for casting flash VAZ SERVICE MANUAL THROTTLE BODY INJECTION NIVA 2 108 ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION 158 POOR FUEL ECONOMY Definition economy as measured by an actual road test is noticeably lower than expected Also economy is noticeably lower than it was on this vehicle at one time as previously shown by an actual road test PRELIMINARY CHECKS e Perform the careful visual physical checks as described at start of Symptoms in this section e Check air cleaner element filter for dirt or being plugged e Visually physically check Vacuum hoses for splits kinks and proper connections e Perform Diagnostic Circuit Check 1s air conditioning ON full time Are tires at correct pressure Are excessively heavy loads being carried fs acceleration too much too often NOTICE Sugg
41. YSTEM CHARTS CONTENTS Manifold Absolute Pressure Output Check cn Throttle Position Sensor Output Check Idle Air Control Circuit Check Canister Purge Valve Ignition System Check No Spark Direct Ignition System Misfire At Idle Direct ignition System Misfire Under Load Intake Manifold Electric Heater e Air Conditioning Compressor Clutch Control Crankcase Ventilation System Check Octane Adjustment Potentiometer Check 2 SERVICE MANUAL THROTTLE BODY INJECTION NIVA 168 2 120 ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION MANIFOLD ABSOLUTE PRESSURE Hose connects to throttle body 70 BLACK Ed 66 GRAY V SM 75 GRAY 43 GREEN ELECTRONIC CONTROL MODULE 5 VOLTS REFERENCE MANIFOLD ABSOLUTE PRESSURE SENSOR INPUT SIGNAL 69 BLACK T TO OCTANE ADJUSTMENT ANO 1 INTAKE AIR TEMPERATURE SENSOR CHART C 1D MANIFOLD ABSOLUTE PRESSURE OUTPUT CHECK 1 7L THROTTLE BODY INJECTION NIVA SENSOR GROUND Circuit Description The manifold absolute pressure sensor measures the changes in the intake manifold pressure which result from engine load intake manifold vacuum and revolutions per minute changes and converts these into a voltage output The electronic control module sends a 5 volt reference voltage to the manifold absolute pressure sens
42. age change indicates a faulty sensor 3 Check vacuum hose to sensor for leaking or restric tion Be sure no other vacuum devices are connected to the manifold absolute pressure sensor hose NOTICE The engine must be running in this step or the Tech 1 will not indicate a change in voltage It is nomnal for the Check Engine light to come ON and for the system to set a Code 33 during this step Make sure the code is cleared when this test is completed 4 Disconnect sensor from bracket and twist sensor BY HAND ONLY to check for intermittent connection Output changes greater than 0 1 volt indicate a faulty connector or connection If OK replace sensor VAZ SERVICE MANUAL THROTTLE BODY INJECTION NIVA ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION 2 121 ms CHART C 1D MANIFOLD ABSOLUTE PRESSURE OUTPUT CHECK 1 7L THROTTLE BODY INJECTION NIVA NOTE THIS CHART APPLIES ONLY TO MAP SENSORS HAVING GREEN OR BLACK COLOR KEY INSERT SEE BELOW t j IGNITION ON ENGINE NOT RUNNING CONNECT TECH 1 SCAN TOOL A SELECT FB DATA LIST TECH 1 SHOULD INDICATE A MANIFOLD ABSOLUTE PRESSURE SENSOR VOLTAGE Li COMPARE THIS READING WITH THE READING OF A KNOWN GOOD VEHICLE SEE FACING PAGE TEST DESCRIPTION STEP 1 VOLTAGE READING SHOULD BE WITHIN 0 2 VOLT sm DISCONNECT PLUG VACUUM SOURCE MANIFOLD ABSOLUTE REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR PRESSURE SENSOR CONN
43. c control module issues commands to obtain commanded idle speed The node lights each should flash red and green to indicate a good circuit as the electronic control module issues commands While the sequence of color is not important if either light is OFF or does not flash red and green check the circuits for faults beginning with poor terminal con tacts Engine speed will not actually change since the idle air control is disconnected Diagnostic Aids slow unstable or fast idle may be caused by a non idle air control system problem that cannot be over come by the idle air control valve Out of control range idle air control Tech 1 tool idle air contro counts will be above 60 if idle is too low and zero counts if idle is 100 high The following checks should be made to repair non idle air control system problem Vacuum Leak High Idle If idle is too high stop the engine Fully extend scat idle air control using 222 DM idle air control Motor Tester in the Low Switch Position Start engine If idle speed is above 1000 revolutions per minute locate and cor rect vacuum leak including Crankcase Ventilation System Also check for binding of throttle blade or linkage Fuel System too lean High Air Fuel Ratio The idle speed may be 100 high or too low Engine speed may vary up and down and disconnecting the idle air control valve does not help Check for low regu lated fuel pressure water in the fuel o
44. e allowing it to measure the variable output voltage from the throttle position sensor As the throttle valve angle is changed accelerator pedal moved the throttle position sensor output voltage also changes proportion At closed throttle position the output voltage is usually below 1 0 volt As the throttle valve opens the output increases so that at wide open the output should be above 4 0 volts By monitoring the out put voltage from the throttle position sensor the electronic control module can determine fuel needs based on throttle opening driver demand A broken or loose throttle position sensor or one that has an unstable output can cause intermittent bursts of fuel because the electronic control module thinks the throtde is moving Results could include engine surge or poor idle quality If the electronic control module interprets a high voltage when engine revolutions per minute is less than 420 hard starting could be the result clear flood mode A problem in any of the throttle position sensor circuits will set cither a Code 21 or 22 after the engine is started Once a code is set the electronic control module will use an artifi cial default value for throttle position sensor based on engine revolutions per minut to enable the vehicle to be dri ven although performance could be less than normal The throttle position sensor is not adjustable The electronic control module uses the reading at idle as 0 t
45. e customer s vehicle to similar unit Make sure the customer has an actual problem Remove air filter and check air filter for dirt or for being plugged replace as necessary FUEL SYSTEM For contaminated fuel For restricted fuel filter or improper fuel pressure use CHART A 7 IGNITION SYSTEM Proper ignition system voltage output with spark tester J 26792 ST 125 Ignition timing Proper operation of electronic spark timing EXHAUST SYSTEM Exhaust system for possible restriction Use CHART B 1 SENSORS Manifold absolute pressure sensor Use CHART C 1D Vacuum hose between engine and manifold absolute pressure sensor for kinks or leaks VAZ SERVICE MANUAL THROTTLE BODY INJECTION NIVA LED ENGINE MANAGEMENT SYSTEMS 1 71 THROTTLE BODY INJECTION 2 103 LACK OF POWER SLUGGISH OR SPONGY Page 2 of 2 Definition Engine delivers less than expected power Little or no increase in speed when accelerator pedal is pushed down part way CHECK CHECK CHECK ENGINE MECHANICAL Engine compression Refer to Engine Manual Engine valve timing Refer to Engine Manual Engine for properor worn camshaft Refer to Engine Manual ADDITIONAL CHECKS Electronic control module grounds for being clean tight and in their proper location These ground wires secure to the engine block on the direct ignition system bracket uppermost bolt Air conditioning operation Air conditioning clutch should cut out a
46. eat and possible resultant short to ground The electronic control module switches ON the heater based upon v rious inputs and conditions Coolant temperature sensor is less than 63 C e Engine is running o Intake air temperature is less than 80 C Battery voltage is greater than 8 volts Once the heater has been ON the electronic control module will tum it OFF if the following conditions exist Battery voltage is less than 6 volts Heavy electrical accessory load Coolant temperature sensor input is greater than 65 Test Description Numbers below refer to circled Diagnostic Aids numbers on the diagnostic chart With ignition ON engine running use Tech 1 3 Heater must be tested at or about 27 C As the OUTPUT TEST to turn ON heater Observe Sys heater warms from 27 C its resistance increases If tem Voltage on Tech 1 System voltage should drop at necessary remove and cool the heater The heater s least 0 3 volts with heater ON Engine must be idling resistance at 27 C should be less than 0 3 ohms for this Tech 1 command to take effect This step checks Circuit 79 wire 5 This step simulates electronic control module con trol of relay 6 This step will determine if the electronic control module is defective or if Circuit 81 is faulty VAZ SERVICE MANUAL THROTTLE BODY INJECTION NIVA ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION 2 141 5 LE THROTTLE BODY INJ
47. ectronic control module is receiving air conditioning request signal If problem exists only with air conditioning ON check air conditioning system for overcharge or undercharge of R12 refrigerant system CHECK Battery cables and ground straps should be clean and secure Erratic voltage will cause idle air control to change its position resulting in poor idle quality e CHECK Idle air control valve will not move if system voltage is below 9 or greater than 16 9 volts Crankcase ventilation system for proper operation see CHART C 13 CHECK ENGINE MECHANICAL CHECK For broken motor mounts Perform a compression check Refer to Engine Manual VAZ SERVICE MANUAL THROTTLE BODY INJECTION NIVA 160 ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION 2 111 EXCESSIVE EXHAUST EMISSIONS OR ODORS A Definition Vehicle fails an emission test Excessive odors do not necessarily indicate excessive emissions PRELIMINARY CHECKS Perform Diagnostic Circuit Check If EMISSION TEST shows excessive carbon monoxide and hydro carbons check items which cause vehicle to run RICH Make sure engine is at normal operating temperature If EMISSION TEST shows excessive oxides of nitrogen check items which cause car to run LEAN ms or too hot SENSORS CHECK Manifold absolute pressure sensor Use CHART C 1D to check the manifold absolute _ Pressure sensor 1 NOTICE If the Tech 1
48. ent recommended procedures 4 26 03 5 14689 VAZ SERVICE MANUAL THROTTLE BODY INJECTION Riva D ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION 2 115 ELECTRONIC CONTROL MODULE PIN CONNECTOR A SYMPTOMS CHART 24 PIN A B CONNECTOR This electronic control module symptoms chart is for use with a digital voltmeter to further aid in diagnosis The voltages you get may vary due to low battery charge or other reasons but they should be very ciose BACKPROBE CONNECTORS ONLY THE FOLLOWING CONDITIONS MUST BE MET BEFORE TESTING Engine at operating temperature Engine idling For Engine Run column Diagnostic test terminal not grounded Tech 1 Scan too not installed Air conditioning OFF Digital voltmeter negative lead connected to a good clean ground point COMPONENT NORMAL VOLTAGE CONNECTOR cones POSSIBLE SYMPTOMS FROM PIN FUNCTION CAVITY AFEC FAULTY QRCUIT A FUBUSYSTEM START SEE CHART 7 PUMP RUNS RELAY CONTROL RELAY 27 ALLTMETIMEC A NO CONNECTION A3 PULSE WIDTH GREEN FUEL LOSS OR FUEL VAPOR ODOR POOR MODULATOR YELLOW IDLE STALLING POOR DRIVEABIUTY CANISTER CONTROL AS CHECK ENGINE NO CHECK ENGINE LIGHT 8 LIGHT CONTROL ALL THE TIME DOES NOT FLASH COOES 16 SEE DIAGNOSTIC CIRCUIT CHECK gt IGNITION S
49. est owner fill fuel tank and fuel economy IGNITION SYSTEM e CHECK Spark plugs Remove spark plugs check for wet plugs cracks wear improper gap burned electrodes or heavy deposits Repair or replace as necessary e CHECK Ignition wires for cracking hardness and proper connections FUEL SYSTEM e CHECK Fuel pressure use CHART 7 COOLING SYSTEM CHECK Engine coolant level e CHECK Engine thermostat for faulty part always open or for wrong heat range Observe Tech 1 Coolant Temp with engine fully warm at road speed ADDITIONAL CHECKS CHECK For correct engine calibrator installed in electronic control module Observe Tech 1 Calibration ID e CHECK For proper calibration of speedometer For dragging brakes OCTANE ADJUSTMENT POTENTIOMETER If premium octane fuel is being used use Tech 1 to observe Octane Adjust With premium octane fuel the Octane Adjust value displayed on Tech 1 should be 0 Use CHART 15 SENSORS CHECK Coolant temperature sensor or air temperature sensor which may have shifted in value Compare coolant temperature sensor resistance to the Diagnostic Aids chart on Code 14 or Code 15 chart Manifold absolute pressure sensor Use CHART C 1D VAZ SERVICE MANUAL THROTTLE 8ODY INJECTION aa d e a m Definition engine r ns unevenly at idle If bad enough the vehicle may ENGIN
50. hrot tle so no adjustment is necessary Test Description Number s below refer to circled 4 If the closed throttle voltage is over 2 5 volts hard number s on the diagnostic chart starting may be encountered worse cold due to don E c clear flood mode This mode occurs when engine 1 This is a check of the voltage at the idle position It revolutions per minute is less than 420 and throttle is usually less than 1 0 volt position sensor input indicates the throttle is more 2 The voltage should increase at the same steady rate than 80 open Possible causes short to voltage on at which the throttle is opened with the throttle throttle position sensor input signal circuit Blue valve wire from throttle position sensor terminal to 3 With the throttle valve wide open the throttle posi electronic control module terminal C13 open tion sensor output needs to be above 4 volts allow ground circuit Pink Black wire from throttle posi ing the electronic control module to interpret a wide tion sensor terminal B to electronic control mod open throttle position ule terminal 11 or a faulty sensor VAZ SERVICE MANUAL THROTTLE BODY INJECTION NIVA 12 2i Li ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION 2 123 CHART C 1H THROTTLE POSITION SENSOR OUTPUT CHECK 1 7L THROTTLE BODY INJECTION NIVA IF A CODE 21 OR 22 IS PRESENT FOLLOW THAT CHART FIRST CONN
51. ing in a lower energy requirement to fire 4 spark plug This leaves the remainder of the high voltage to be used to fire 1 spark plug On this application the crankshaft position sensor is mounted to the engine block and protrudes to within approximately 1 mm of the crankshaft reluctor Since the reluctor is a machined portion of the crankshaft pulley and the crank sensor is mounted in a fixed position on the block timing adjustments are not possible or necessary Test Description Number s below refer to circled 3 If the spark jumps the test gap after grounding the number s on the diagnostic chart opposite plug wire it indicates excessive resistance Mi 2 in the plug which was bypassed A faulty or poor 1 If the Misfire complaint exists under load only connection at that plug could also result in the miss diagnostic CHART C 4C must be used Engine rpm condition Also check for carbon deposits inside the should drop approximately equally on all plug leads spark plug boot 2 A secondary ignition voltage ignition tester J 26792 ST 125 must be used because it is essential to veri fy adequate available secondary voltage at the spark plug 25 000 volts VAZ SERVICE MANUAL THROTTLE BODY INJECTION NIVA 182 i E E m s ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION 2 133 CHART 4 Page 1 of 2 DIRECT IGNITION SYSTEM MISFIRE AT IDLE
52. lace coil and be sure plug wires relating to that coil are clean and tight 1 If the Misfire complaint exists at idle only diag nostic CHART C 4B must be used A secondary Us be eed ecl ar Excessive wire resistance or faully connections quate available secondary voltage at the spark plug Could have caused the coil to be damaged 25 000 volts Spark should jump the test gap on all 4 If the no spark condition follows the suspected coil 4 leads This simulates a load condition that coil is faulty Otherwise the ignition module is the cause of spar This test could also be per formed by substituting a known good coil for the one causing the no spark condition 2 If the spark jumps secondary ignition voltage igni tion tester J 26792 ST 125 gap after grounding the opposite plug wire it indicates excessive resistance in the plug which was bypassed VAZ SERVICE MANUAL THROTTLE 8ODY INJECTION NIVA ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION 2 137 ENGINE MISFIRES AT IDLE ONLY SEE CHART C 48 CHART C 4C IGNITION ort DIRECT IGNITION SYSTEM DISCONNECT ONE SPARK PLUG LEAD AT A TIME INSTALL MISFIRE UNDER LOAD SECONDARY IGNITION VOLTAGE IGNITION TESTER J 26792 ce rus N 1 7L THROTTLE BODY BSERVE SECONDARY IGNITION VOLTAGE IGNITION TESTER WITH ENGINE IDLING REPEAT THIS TEST FOR ALL PLUG INJECTION NIVA CABLES SEE CAUTION fe SPARK SHOULD JUMP SECONDARY IGNITION
53. lenoid remember that this is an OFF and ON control only The Tech 1 Scan tool is not capable of adjusting the pulse width VAZ SERVICE MANUAL THROTTLE BODY INJECTION NIVA ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION CHART C 3 CANISTER PURGE VALVE CHECK 1 7L THROTTLE BODY INJECTION NIVA IGNITION ENGINE STOPPED 14 ATTHESOLENOIO USE HAND OPERATED VACUUM PUMP J 35555 APPLY VACUUM 107 Hg OR 34 kPa TO MANIFOLD VACUUM SIDE OF SOLENOID ABLE TO GET 107 Hg OR 34 kPa OF VACUUM ENGINE IDUNG ENERGIZE SOLENOID 8Y USING THE TECH 1 SCAN TOOL EVAP SOLENOID MODE IN ORDER TO GET TO THIS AREA OF THE TOOL YOU MUST FIRST SCAN THROUGH MISC TESTS AND OUTPUT TESTS VACUUM SHOULD DROP DOES IT YES WITH ENGINE 1OLING VERIFY THAT A MINIMUM OF 10 Hg 34 kPa OF VACUUM IS DOES VACUUM NOW AVAILABLE AT CANISTER PURGE DROP SOLENOID 1517 OISCONNECT SOLENOID SEE DIAGNOSTIC AIDS ON FACING ELECTRICAL CONNECTOR 34 kPa OF VACUU DISCONNECT SOLENOID CONNECT TEST LIGHT BETWEEN HARNESS TERMINALS TESTUGHT HOULD NOT LIGHT OOESIT FAULTY SOLENOIO CONNECTION OR SOLENOID PROBE EACH TERMINAL WITH A TEST LIGHT TO GROUND SHORTED CIRCUIT 41 OR FAULTY ELECTRONIC CONTROL MODULE REPAIR SHORT TO VOLTAGE IN GRCUIT41 CHECK HOSES IF OK REPLACE PAGE PURGE SOLENOID 112 92 NS 14397
54. med ON and OFF several times a second The duty cycle pulse width is calculated based on the current value of the Closed Loop fuel adjustment The duty cycle is calculated by the electronic control module and the output commanded when the following condi tions have been met Battery voltage is less than 16 9 volts Coolant temperature above 80 C Vehicle speed above 21 kilometers per hour Throttle position has exceeded 2 Also if the diagnostic test terminal is grounded with the engine stopped the purge solenoid is energized purge ON NOTICE Once enabled it will remain enabled except during a wide open throttle condition Test Description Number s below refer to circled Diagnostic Aids number s on the diagnostic chart e If 10 Hg 34 kPa of vacuum is not available at the 1 Checks to see if the solenoid is opened or closed solenoid check for The solenoid is normally de energized in this step Split or cracked hoses so it should be closed a Pinched or plugged hoses Checks for a complete circuit Normally there is ignition voltage on Circuit 25 and the electronic control module provides a ground on Circuit 41 Completes functional check by grounding test ter minal This should normally de energize the sole noid opening the valve which should allow the vac uum to drop purge ON Ensure hoses are installed correctly When using the Tech i Scan tool to energize the so
55. or As the manifold pressure changes the output voltage of the sensor also changes By monitoring the sensor output voltage the electronic control module knows the manifold pressure A lower pressure low voltage output will be about 1 2 volts at idle While higher pressure high voltage output will be about 4 4 8 at wide open throttle The manifold absolute pressure sensor is also used under certain conditions to measure barometric pressure allowing the electronic control module to make adjustments for different altitudes The electronic control module uses the manifold absolute pressure sensor to control fuel delivery and ignition timing Test Description Number s below refer to circled number s on the diagnostic chart Important e sure to use the same diagnostic test equipment for all measurements 1 Checks manifold absolute pressure sensor output voltage to the electronic control module This volt age without engine running represents a barometer reading to the electronic control module Com parison of this barometric reading on the same day with a known good vehicle is a good way to check accuracy of a suspect sensor Readings should be the same 10 2 voit 2 Allowing 0 34 BAR 10 Hg vacuum to the mani foid absolute pressure sensor should cause the voltage to be at least 1 2 volts less than the voltage at Step 1 Upon applying vacuum to the sensor the change in voltage should be instantaneous A slow volt
56. r a restricted injector Fuel System too rich Low Air Fuel Ratio The idle speed will be too low Scan tool idle air con trol counts will usually be above 80 System would be obviously rich and may exhibit black smoke in exhaust Check for high fuel pressure leaking or sticking injector Throttle Body Remove idle air control valve and in spect bore and idle air passages for foreign material Idle Air Control Valve Electrical Connections Idle air contt l valve connections should be careful ly checked for proper contact Crank ase Ventilation System A faulty system may result in an incorrect idle speed Refer to Rough Unstable Incorrect dle or Stalling in Symptoms Section 2 9B If intermittent poor driveability or idle symptoms are resolved by disconnecting the idic air control carefully recheck idle air control connections and terminal resistance VAZ SERVICE MANUAL THROTTLE BOOY INJECTION NIVA 27 ENGINE MANAGEMENT SYSTEMS 1 71 THROTTLE BODY INJECTION 2 125 n EI TENIS VE 1 BODY INJECTION 2 125 CHART C 2C IDLE AIR CONTROL CIRCUIT CHECK 1 7L THROTTLE BODY INJECTION NIVA c ENGINE AT NORMAL OPERATING TEMPERATURE 8S C 95 C ENGINE IOLING IN NEUTRAL WITH PARKING BRAKE SET AIR CONDITIONING OFF CONNECT TECH 1 SCAN TOOL SELECT MISC TESTS THEN IDLE SYSTEM THEN IDLE CONTROL WITH THE THROTTLE REMAINING CLOSED COMMAND THE DESIRED
57. r resulting in both 1 and 4 spark plugs firing at the same time 1 cylinder is on the com pression stroke at the same time 4 is on the exhaust stroke resulting in a lower energy requirement lo fire 4 spark plug This leaves th remainder of the high voltage to be used to fire 1 spark plug On this application the crankshaft position sensor is mounted to the engine block and protrudes to within approximately 050 of the crankshaft reluctor Since the reluctor is a machined portion of the crankshaft pulley and the crank sensor is mounted in a fixed position on the block timing adjustments are not possible or necessary Test Description Number s below refer to circled 6 number s on the diagnostic chart 4 To check the spark plug cable use the digital multi meter J 39689 on the ohms scale Disconnect the suspect spark plug cable from both ends and con nect one of the multimeter probes to each end of the plug cabie 5 Uf carbon tracking is evident replace coil and be sure plug cables relating to that coil are clean and tight Excessive cable resistance or faulty connec tions could have caused the coil to be damaged If the no spark condition follows the suspected coil that coil is faulty Otherwise the ignition module is the cause of no spark This test could also be performed by substituting a known good coil for the one causing the no spark condition VAZ SERVICE MANUAL THROTTLE BODY INJECTION NIVA 184
58. r revolutions per minute greater than 10 wats dependi 5 Depending on oaaae adjust Less than 0 10 volts upon position of drive wheels When potenti is moving voltage will vary 7 Battery voltage with engine Air Conditioning Vehicles Only 3 depending upon velie 8 Open 8 Should equal battery voltage 5 27 92 NS 14376 VAZ SERVICE MANUAL THROTTLE BODY INJECTION NIVA 167 2 118 ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION ELECTRONIC CONTROL MODULE PIN CONNECTOR D SYMPTOMS CHART 32 PIN C D CONNECTOR This electronic control module symptoms chart is for use with a digital voltmeter to further aid in diagnosis The voltages you get may vary due to low battery charge or other reasons but they should be very close BACKPROBE CONNECTORS ONLY R TING Engine at operating temperature Engine idling For Engine Run column Diagnostic test terminal not grounded Tech 1 Scan too not installed Air conditioning OFF N Digital voltmeter negative lead connected to a good clean ground point POSSIBLE SYMPTOMS FROM FAULTY o1 ELECTRONIC 7A 12 D 1 OPEN NO START CONTROL MODULE SEE DIAGNOSTIC CIRCUIT CHECK GROUND SEE TERMINAL A12 02 OCTANE ADJUST OCTANE ADIUST 37 ROUGH OR UNSTABLE IDLE MAY STALL POTENTIOMETER MANIFOLD ABSOLUTE POOR PERFORMANCE 8 MANIFOLD ABSOLUTE PRESSURE
59. ronic control module the electronic control module When it has 12 volts applied to termi senses the air conditioning is requested it will energize the air condi tioning Compressor Clutch Control relay by providing a ground path for the coil of the relay The relay contacts will close and current will flow from the relay and eng ge the air conditioning Compressor Clutch The electronic control module de energizes the relay under the following conditions If the throttle position sensor is greater than about 95 No air conditioning requested Coolant temperature is above about 112 C Test Description Number s below refer to circled number s on the diagnostic chart 1 The air conditioning compressor clutch should not engage until about 0 3 second after the output test is enabled With engine idling and air conditioning dash switch ON the electronic control module should be grounding the relay control circuit causing the test light to be ON M Engine speed is above about 6375 revolutions per minute Vehicle speed less than 7 km h and throttle position greater than 50 Diagnostic Aids The Tech 1 Scan tool displays air conditioning request signal voltage at ihe electronic control raodule B8 A shon to voltage cn Circuit 84 Green wire to elec ironic control module terminal B8 will display air conditioning request Yes in all positions of dash switch VAZ SERVICE
60. shaft position sen and wires to complete the circuit of each coil the sor am 1005 2 opposite spark plug cable should be connected to 5 Voltage will vary in this test depending on cranking ground speed of engine 2 This test will determine if battery voltage is avail able at the ignition module VAZ SERVICE MANUAL THROTTLE BODY INJECTION NIVA gt E 52 ENGINE MANAGEMENT SYSTEMS 1 71 THROTTLE BODY INJECTION 2 129 TEEN EMS L ROT LE BODY INJECTION 2 129 CHART C 4 Page 1 of 2 IGNITION SYSTEM CHECK NO SPARK 1 7L THROTTLE BODY INJECTION NIVA NOTE THIS CHART ASSUMES THAT THE TECHNIGAN HAS PERFORMED DIAGNOSTIC CIRCUIT CHECK CHART A USING SECONDARY IGNITION VOLTAGE IGNITION TESTER 226792 ST 125 CHECK FOR SPARK CHECK ONE CABLE AT A TIME USING CONNECTOR TERMINAL TEST ADAPTER KIT 35616 TO JUMPER THE IGNITION COIL COMPANION CABLE CONNECTED TO GROUND WHILE CRANKING gt CHECK FOR SPARK ON CABLES 1 2 3 AND 4 15 THERE SPARK ON AT LEAST ONE CABLE NO IGNITION OFF DISCONNECT DIRECT IGNITION SYSTEM MODULE 2 PIN AND 6 PIN CONNECTOR IGNITION ON d CONNECT TEST LIGHT J 34142 8 BETWEEN GROUND AND DIRECT IGNITION SYSTEM MODULE 2 PIN CONNECTOR HARNESS TERMINAL CONNECT TEST LIGHT TO 6 PIN CONNECTOR HARNESS TERMINAL 8 15 TEST LIGHT FOR EACH CIRCUIT SEE
61. t of Symptoms in this section Be sure driver understands air conditioning compressor operation in owner s manual Use a Tech 1 Scan tool to make sure reading of vehicle speed sensor matches vehicle speedometer FUEL SYSTEM Fuel pressure while condition exists use CHART A 7 In line fuel filter Replace if dirty or plugged IGNITION SYSTEM For proper ignition system voltage output using spark tester 26792 ST 125 Spark plugs Remove spark plugs check for wet plugs cracks wear improper gap burned electrodes or heavy deposits Repair or replace as necessary For misfire under load Use CHART 4 ADDITIONAL CHECKS Electronic control module grounds for being clean tight and in their proper locations Th se ground wires secure to the engine block on the direct ignition system bracket uppermost bolt This bolt was previously used to retain the distributor a carbureted engine Alternator output voltage Repair if less than 9 or more than 16 9 volts Vacuum lines for kinks or leaks VAZ SERVICE MANUAL THROTTLE BODY INJECTION NIVA 2 102 ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION LACK OF POWER SLUGGISH OR SPONGY Page 1 of 2 Definition Engine delivers less than expected power Little or no increase in speed when accelerator pedal is pushed down part way PRELIMINARY CHECKS Perform the careful visual physical checks as described at start of Symptoms in this section Compar
62. t wide open throttle Altemator output voltage Repair if less than 9 or more than 16 9 volts VAZ SERVICE MANUAL THROTTLE BODY INJECTION NIVA 153 2 104 ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION DETONATION SPARK KNOCK Page 1 of 2 Definition mild to severe ping usually worse under acceleration The engine makes sharp metallic knocks that change with throttle opening PRELIMINARY CHECKS Perform the careful physical visual checks as described at start of Symptoms in this section Make sure the customer has an actual problem Remove air filter and check air filter for dirt or for being plugged replace as necessary COOLING SYSTEM For obvious overheating problems Low engine coolant Loose water pump belt Restricted air flow to radiator or restricted water flow thru radiator Faulty or incorrect thermostat Correct coolant solution SENSOR Coolant temperature sensor which may have shifted in value Cornpare coolarit temperature sensor resistance to the Diagnostic Aids chart on Code 14 or Code 15 chart FUEL SYSTEM CHECK Fuel pressure use CHART 7 e CHECK For poor fuel quality proper octane rating NOTICE If Tech 1 tool readings are normal see TECH 1 SCAN TOOL TYPICAL DATA VALUE list and there no engine mechanical faults fill fuel tank with a fresh and proper fuel for vehicle and evaluate vehicle performance OCTANE ADJUSTMENT POTENTIOMETER As built at
63. tested coil is at fault This test could also be performed by using another known good coil VAZ SERVICE MANUAL THROTTLE BODY INJECTION NIVA E ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION 31 CHART C 4 Page 2 of 2 IGNITION SYSTEM CHECK NO SPARK 1 71 THROTTLE BODY INJECTION NIVA i FROM CHARTCA USING DIGITAL VOLT OHM MULTIMETER KIT 1 39689 TO CHECK THE RESISTANCE OF EACH PLUG CABLE OF THE COIL WHICH DID NOT FIRE THE SPARK TESTER CABLE RESISTANCE SHOULD BE LESS THAN 15 000 OHMS EACH AND WIRES SHOULD NOT GROUNDED ARECABLES F MEASURE SECONDARY RESISTANCE OF IGNITION COIL BY CONNECTING EACH MULTIMETER LEAD ON EACH TOWER TERMINAL 15 RESISTANCE BETWEEN 5000 AND 7000 OHMS REPLACE FAULTY CABLE S ae REMOVE COIL RETAINING NUTS AND REMOVE s s COIL SHOULO BE FREE OF CARBON TRACKING ARE THEY FAULTY IGNITION COU 4 MEASURE PRIMARY RESISTANCE OF IGNITION COIL BY CONNECTING EACH MULTIMETER LEAD ON EACH FEMALE TERMINAL ON BOTTOM OF o IGNITION i pops ISRESISTANCE BETWEEN 0 30 AND 1 507 j REPLACE IGNITION COIL ALSO CHECK FOR FAULTY SPARK PLUG CABLE CONNECTION S AND WIRE NIPPLE S FOR CARBON TRACKING USE TEST LIGHT 34142 8 AND CONNECTOR TERMINAL FAULTY CONNECTION TEST ADAPTER KIT J 35616 TO JUMPER TEST LIGHT ACROSS
64. ttle body injection assembly for fuel leakage Refer to CHART A 7 Fuel System Diagnosis Fuel pressure use CHART A 7 IGNITION SYSTEM CHECK ignition system for Proper ignition voltage output with spark tester J 26792 ST 125 Spark plugs wet plugs cracks wear improper gap burned electrodes or heavy deposits Spark plug leads wires for excessive resistance Bare and shorted wires Crankshaft sensor resistance and connections Loose ignition coil connections For misfire at idle Use CHART 4 VAZ SERVICE MANUAL THROTTLE BODY INJECTION NIVA 159 2 110 ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION ROUGH UNSTABLE OR INCORRECT IDLE STALLING Page 2 of 2 Definition engine runs unevenly at idle If bad enough the vehicle may shake Also the engine idle speed may vary called hunting Either condition may be severe enough to cause stalling Engine idles at incorrect speed ADDITIONAL CHECKS e CHECK Vacuum leaks can cause higher than normal idle speeds e CHECK Idle air control operation use CHART C 2C CHECK Electronic control module grounds for clean tight and in their proper location These ground wires secure to the engine block on the direct ignition system bracket uppermost bolt This bolt was previously used to retain the distributor on a carbureted engine NOTICE Use Tech 1 Scan tool to determine if el
65. y with engine Its WA be either less than T vot or revolutions per minute Less than 0 50 vo greater than 10 volts depending s Depending on octane adjust Less than 0 10 voits Upon position of drive wheels When trim DITE d vehicle is moving voltage will vary 7 ry voltage B with engine Air Conditioning Vehicles Only temperature Open B Should equal battery volage NS 14374 VAZ SERVICE MANUAL THROTTLE BODY INJECTION 165 2 116 ENGINE MANAGEMENT SYSTEMS 1 7L THROTTLE BODY INJECTION ELECTRONIC CONTROL MODULE PIN CONNECTOR B SYMPTOMS CHART 24 PIN A B CONNECTOR This electronic control module symptoms chart is for use with digital voltmeter to further aid in diagnosis The voltages you get may vary due to low battery charge or other reasons but they should be very close BACKPROBE CONNECTORS ONLY THE FOLLOWING CONDITIONS MUST BE MET BEFORE TESTING Engine at operating temperature Engine idling For Engine Run column Diagnostic test terminal not grounded e Tech 1 Scan tool not installed Air conditioning OFF Digital voltmeter negative lead connected to a good clean ground point Components NORMAL VOLTAGE WIRE CONNECTORS POSSIBLE SYMPTOMS FROM PIN FUNCTION COLOR CAVITY Kk FAULTY GRGIT 8 BATTERY ELECTRONIC Fus BLOWN NO START 10 POWER SUPPLY CONTR VF 16 ANO 817 OPEN NO START MODULE SEE DIAGNOSTIC CIRCUIT CHECK

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