Charge! New Regulated Voltage Control System
Contents
1. TECH WA wie F AYN aain as ey an Mi Traditional charging systems use an internal temperature sensor inside the generator to establish generator voltage set points When the generator is cold it raises the voltage out put set point When the generator is hot it lowers the voltage output set point This type of system tends to overcharge the battery on long trios at highway speeds and undercharge the battery on short trios with low vehicle speeds Regulated Voltage Control RVC is a new dynamic control of the vehicle s system volt age It regulates the generator s output volt age based mainly on estimated battery tem perature and battery state of charge The main benefits of this system are e Improved fuel economy e Extended battery life e Extended lamp life e Extended switch life GM is using three different generations of RVC systems on a number of new models including Cadillac CTS SRX and STS Chevrolet and GMC full size trucks and SUVs Chevrolet Cobalt and Uplander Buick LaCrosse and Terazza and Pontiac Grand Prix and Montana SV6 Since the RVC system allows changes to vehicle voltage up or down under various scenarios the battery state of charge and the vehicle s present electrical needs are two conditions taken into account the voltmeter may fluctuate Conventional systems usually maintain a consistent reading of 14 volts The fluctuation of the RVC system may range betwe2. are compatible with one another however mixing the coolants diminishes the extended life properties of DEX COOL In addition to proper cooling system operation It s important to maintain the proper fill level with DEX COOL in order to avoid aluminum corrosion Measuring Coolant The protection offered by engine coolant not only includes protection from freezing or over heating but corrosion protection as well A properly maintained coolant mixture protects cooling system components and ensures effi cient engine cooling Corrosion problems originate in the different metals in an engine that can react with corro sive coolant byproducts To combat this coolant contains additional chemicals known as Inhibitors to minimize corrosion The inhibitors are designed to act as a buffer to protect the cooling system However over time they become depleted and the coolant wears out Check the radiator cap using a pressure tester to ensure it s operating properly If a cap fails to hold pressure it can lead to coolant loss overheating and system contamination Approved DEX COOL Providers ACDelco is one of only six approved providers of DEX COOL Simply put other products that are advertised as compatible or recommended for use with DEX COOL have not been tested or approved by GM Non approved coolants may degrade the integrity of the cooling system and are not considered 5 year 150 000 mile coolants Co
3. the wear indicator on these pad sets has a taller center positioning tab than the outboard tab The inboard pad also has a thicker metal backing and a thinner fric tion block than the outboard pad When installing the pads do not grind the length of the center mounting tab enable the wrong pad to the mounted outboard If the center positioning tab appears to be too long the pads are mounted incorrectly Refer to ACDelco bulletin O05D J 076 for more information Thanks to Dennis Kissack 2 ACDelco T lt connect Bia i GL Low i m M l m L l et eee ACDelco TechConnect is published bi monthly for retail technicians to provide timely service information increase knowledge and improve the performance of the service center Publisher amp Editor Greg Baker ACDelco E mail lt greg baker gm com Technical Editors Mark Spencer E mail lt gt mark spencer sandycorp com Jim Horner E mail lt jim horner sandycorp com Desktop Publishing Greg Szpaichler MediaWurks E mail lt greg mediawurks com Write to ACDelco TechConnect P O Box 500 Troy MI 48007 0500 On the Web LJ acdelcotechconnect com ACDelco service tips are intended for use by professional technicians not a do it yourselfer They are written to inform those technicians of condi tions that may occur on some vehi cles or to provide information that could assist in the proper service of a vehicle Prope
4. RVC System Generation Generation Il Generation Il Generation Ill Generation IV Charge Mode Fuel Economy Mode Voltage Reduction Mode Start Up Mode Battery Sulfation Mode Generation IV Charge Mode Fuel Economy Mode Voltage Reduction Mode Start Up Mode Battery Sulfation Mode Generation IV Charge Mode Fuel Economy Mode Voltage Reduction Mode Start Up Mode Battery Sulfation Mode Battery Current Sensor to monitor frequency When the system is operating normally you should read a duty cycle of 5 95 depending on which mode the system is in and also the battery SOC The 5 volt reference signal for the PWM signal is provided by the generator and cycled to ground by the ECM PCM or generator battery control module depending on the system For F terminal diagnostics set your DVOM to monitor frequency When the system is operating normally you should read a duty cycle of 5 99 depending on which mode the system is in and also the battery SOC The ECM PCM or generator battery control mod ule depending on the system provides the 5 volt reference signal for the PWM signal and is cycled to ground by the generator A scan tool may include some of the follow ing parameters ECM PCM e Generator L Terminal e Generator F Terminal e Battery Voltage BCM DIM IPM e Battery Current Sensor e Battery Voltage e gnition Voltage Load Shed Level e Idle Boost Level The generator battery control module incor po
5. generator field duty cycle Signal circuit and sends the information to the BCM IPM On some vehicles the ECM PCM overrides the control decision of the BCM PCM when the following conditions are met e The engine cooling fans are ON high speed e There is a high fuel demand e The calculated ambient air temperature is less that 0 C 32 F Instrument Panel Cluster IPC The IPC provides a means of driver notification in case of a charging system failure Generator Battery Control Module It communicates with the PCM IPC and BCM for RVC operation It is a serviceable compo nent that is connected to the negative battery cable at the battery It directly controls the generator field control circuit input to the gen erator It monitors the generator field duty cycle signal circuit its internal battery current sensor the battery positive voltage circuit and estimated battery temperature to determine battery state of charge SOC General System Diagnostics Diagnostics are specific for each vehicle that uses this system Refer to the applicable ser vice manual for DTC information For L terminal diagnostics set your DVOM RVC Systems The following chart shows the different generations of RVC systems currently in use Modes of Operation Key Components RVC Mode DIM PCM 2004 Cadillac CTS RVC Mode DIM ECM 2004 Cadillac SRX Charge Mode and Voltage Battery Current Sensor 2005 Cadillac STS Reduction Mode IPM ECM
6. the cus tomer and send in the repair order to Universal Warranty which will send you a check for the completed work With every customer who comes into your service center with a ser vice contract claim there is an opportuni ty to provide normal vehicle maintenance sell non covered parts and service and develop future business by providing ser vice and maintenance on other vehicles owned by the customer Program Specifications The Vehicle Service Contract program can be compared to a health PPO for a customer s vehicle e The participating TSS service center is the In Network provider e The deductible ata TSS In Network provider is 100 e The deductible at all other Out of Network repair facilities is 500 In the program customers have a 400 incentive to take their service business to your participating TSS service center There are no fees or sign up costs to participate in the program however because of the competitive vehicle ser vice contract environment all of the ACDelco Vehicle Service Contract busi ness entities have made concessions Increase Your Profits with the i VEHICLE SERVICE CONTRACT PROGRAM to drive down costs Universal Warranty Corporation and their independent repre sentatives for example have reduced their fees for administering the program by 40 to 50 percent TSS service center participants are required to limit costs by reducing their labor rate an
7. 05 CITGO Bassmaster Tournament Trail 2005 Angler of the Year Standings Points after 6 of 6 tour stops 1 Aaron Martens 1392 117 Jimmy Houston 608 TE y DERG JT a al me ll E l ERARJLZJ gt 2L E The following technical tips provide repair information about specific conditions on a variety of vehicles If you have a tough or unusual service repair the TSS Technical Assistance Hot Line can help Call 1 800 825 5886 prompt 2 to speak with a technical expert with the latest OEM information Using a Battery Charger During Programming The programming of modules requires the ignition key to be turned on without the engine running This of course means that during the programming event the vehicle s systems are operating from the vehicle bat tery This in turn means that the vehicle s battery must be adequately charged Ideally fully charged It s recommended not to connect any ex ternal power supply to the vehicle battery as a part of the programming procedure Here are some reasons why a battery charger should not be connected during programming First the voltage output of the charger may be higher than normal system voltage either constantly or in spikes The programming scan tool commands all modules of the vehicle to be quiet except the one being programmed This is to avoid the confusion of messages on the data line that would result if multiple modules were awake and conversing However i
8. Battery SOC state of charge is less than 80 continued on page 3 IN THIS ISS New Regulated Voltage Control System 1 Fuel Tank Module Fuel Pump Module Connector 2 Incorrect Placement of Inboard and Outboard Brake Pads 2 DEX COOL and Conventional Engine Coolant 2 3 4 Measuring Coolant 4 Vehicle Service Contract Program 5 Keeping Current in Air Conditioning 5 Service Advisor Seminar 6 Sports Report 0 aan 6 Tech Tips 0 ene 7 Tell Us about Your TechConnect 8 acdelcotechconnect com Replace the Connector When Replacing Fuel Tank Module Fuel Pump Module Anytime the fuel tank module fuel pump module is replaced on 1999 2003 Cadillac Escalade 1996 2001 Chevrolet Suburban GMC Suburban and GMC Yukon XL 1996 2003 Chevrolet Silverado Chevrolet Tahoe GMC Sierra and GMC Yukon models excludes 2003 E85 flexible fuel vehicles and diesel vehicles the Metri Pack 150 con nector ACDelco part number PT2054 also should be replaced It s important to note that not all vehicles use the Metri Pack 150 Connector Metri Pack 150 connector This information does not apply to vehicles equipped with the GT 280 connector The Metri Pack 150 connector should be replaced because any residual damage to the connector may result in a voltage drop across the module which can lead to repeat failures When replac
9. and copper found in most automotive cooling systems These enhanced properties of DEX COOL protect the cooling system components for a longer service life of 5 years 150 000 miles Conventional coolant has a 2 year 30 000 mile service interval To distinguish DEX COOL from green con ventional coolant DEX COOL is made orange in color After a period of use however DEX COOL may appear pink This change in color does not affect the integrity of the coolant and it still maintains its long service life In addi tion the repeated use of seal tabs in the cool ing system may also discolor the coolant Corrosion protection limits the service life of conventional coolant to its 2 year 30 000 mile service interval The corrosion inhibitors in DEX COOL remain above 95 of their original concentration after 150 000 miles allowing for the much longer service interval The corrosion inhibitors of conventional coolant also are abrasive to water pump seals With the elimination of typical inhibitors such as silicates phosphates borates nitrites and nitrates water pump seal life is increased G Checking the Coolant To reduce the chance of overheating and other problems caused by the poor condition of the coolant check the coolant level and its con dition regularly using a quality refractometer Before topping off a cooling system first determine if the system is filled with DEX COOL or conventional coolant The coolants
10. battery current in and out of the battery The control module then regulates the charging voltage to keep the battery above an 80 SOC System Components Battery Current Sensor The battery cur rent sensor is a serviceable component that is connected to the negative battery cable at the battery The battery current sensor is a 3 wire Hall effect current sensor that monitors the battery current It directly inputs to the BCM It creates a 5 volt PWM signal of 128 Hz with a duty cycle of 0 100 Normal duty cycle is between 5 95 The ranges between 0 5 and 95 100 are for diagnostic purposes Body Control Module BCM Instrument Panel Module IPM and Dash Integration Module DIM The BCM determines the out put of the generator and sends the information to the ECM PCM for control of the generator L terminal control circuit It monitors the gen erator field duty cycle signal circuit information sent from the ECM PCM that determines the generator electrical load It monitors the bat tery current sensor the battery positive volt age circuit and estimated battery temperature to determine battery state of charge SOC The BCM performs or sends commands to ECM or other controllers to perform idle boost and load management operations ECM PCM The ECM PCM directly con trols the generator field control circuit input to the generator The ECM PCM receives control decisions based on messages from the BCM IPM It monitors the
11. d parts charges The consid erable volume of projected new business is expected to compensate for these cost reductions The ACDelco Vehicle Service Contract program is the only national program of its kind No other parts suppliers have developed a national program like this one And it benefits from national support and advertising trom ACDelco To enroll visit acdelcovsc com down load the short sign up agreement and fax the form to 402 691 5455 The web site also provides additional details about the ACDelco Vehicle Service Contract program including pricing infor mation and helpful Frequently Asked Questions Thanks to Sheri Sierakowski Keeping Current in Air Conditioning Emerging HVAC Technology amp Service Issues In the lives of automotive technicians and counter support personnel the ability to remain current on industry developments is difficult Changes on many fronts from OEMs tool and equipment suppliers parts suppliers and governmental regulatory groups all affect the automotive industry and its operation There are numerous changes but with limited time you only want to know which ones affect me ACDelco has substantially revised its A C seminar for 2005 And it s your opportunity to learn more about recent changes and their effect on automotive service The Emerging HVAC Technology amp Service Issues seminar is conducted through a participating ACDelco Dedicated Distributor G
12. dition of starts runs then dies or if the vehicle will not start after sitting for a period of 30 minutes or longer hook up the vacuum pressure gauge to the Schraeder valve on the right front valve cover to determine If air intrusion into the fuel system is the root cause of the con dition With the vacuum pressure gauge hooked up prime the fuel manager until 10 psi is reached If pressure does not reach 10 psi after twenty or So pumps air intrusion is the cause Refer to the fuel system diagnos tic in the service information In the case of a cranks no start condition use a scan tool to check for codes If no codes are present use the vacuum pressure gauge a to check the fuel Vacuum Pressure Gauge hookup Supply system vacuum to the pump while cranking If the vacuum increas es to more than 5 In Hg there is a restric tion in the fuel system between the fuel tank and the high pressure pump If the vac uum is OK ensure that pressure Is being made under Engine Data 1 looking at Actual Fuel pressure Observe the Engine Cranks but Does Not Run Diagnostic in the service information and follow the guidelines provided in order to determine if the pump or the fuel injec tors are the problem Tell Us about Your TechConnect TechConnect provides retail technicians with the latest information from ACDelco and the automotive industry all designed to help improve your service knowledge Each is
13. en 12 and 14 volts This is normal sys tem operation Two RVC Systems There are two types of RVC systems used today integrated RVC and stand alone RVC SARVC Integrated systems use a battery current sensor to provide a body control module BCM the amount the battery Is charging or discharging Accurate voltage mea surements are taken through the battery posi tive voltage and ignition 1 voltage circuits The BCM then communi cates information over serial data circuits for the ECM PCM to directly control the generator SARVC systems do not use the BCM for operation They have a generator battery con trol module mounted to the negative battery cable to interpret battery current and voltage and battery temperature inputs The battery Current sensor Is internal to the module This module also directly controls the generator L terminal duty cycle instead of the ECM PCM Both types of system have two types of corrective actions to insure the battery stays at an 80 state of charge These include up to three levels of load shed and up to three levels of idle boost operation System Operation The basic operation of the RVC system is covered here but not all systems will enter all modes of operation refer to the applicable service Manual information for more details The purpose of the RVC system is to main tain the battery state of charge at 80 or above and support vehicle loads The six modes of operation
14. f the module being programmed sees a voltage above a cer tain threshold it may also shut itself down in an act of self preservation This will interrupt programming Another possibility is that some of the other modules may be awakened temporari ly as charger voltage varies This could then result in confusing unwanted conversations on the data line interrupting programming second the battery charger output may contain unwanted AC Although a charger is designed to convert AC alternating current to DC direct current it s possible that some of the AC is not rectified and passes out of the charger as noise This may also be called AC ripple or artifacts Regardless the presence of anything but pure DC can cause interference with the programming process Before programming be sure all acces sories are turned off In addition it s recommended that you unplug any devices from the vehicle s acces sory power outlets cigarette lighters for two reasons First the devices are consuming power which reduces system voltage And second some plugged in devices can cause interference on their own One such exam ple would be a generic cell phone charger Debris in Transmission Space Plate 2001 05 GM passenger cars and light duty trucks equipped with the 4L60 E or 4L65 E automatic transmission There are several reasons for a 4L60E RPO M30 or 4L65E RPO M32 transmis sion to set a DIC P0756 2 3 Shift Solenoid Per
15. f the strength of inhibitors in the coolant and as a result corrosion protection When checking the specific gravity you must compensate for coolant temperature because specific gravity readings decrease as the temperature increases Specific gravity readings are quoted for a corrected 60 F temperature mechanical breakdowns on the highway A coolant exchanger can replace virtually all of the old coolant automatically with new coolant Simply draining the radiator leaves up to half of the old coolant inside the engine block Using a coolant exchanger with a vacuum feature also enables trapped air to be removed from the cooling system and allows venting of a hot system to relieve system pressure Approved coolant exchangers are available from SPX through the Dealer Equipment pro gram Call 1 800 336 6687 to order or for more information If the vehicle was originally equipped with DEX COOL and has not had any contamination problems from non DEX COOL coolants the cooling system should be refilled with DEX COOL The service interval remains 5 years 150 000 miles Recycling Used DEX COOL can be combined with used conventional coolant to be recycled It is then designated as a 2 year 30 000 mile con ventional coolant DEX COOL can not be recycled in the ser vice center and maintain its extend ed life properties For recycled DEX COOL that meets GM specifi cations for extended life coolant the only lice
16. ffective sales techniques e The repair order e Closing the loop to create exceptional customer service Once participants have identified their strengths they can then begin to deter mine in what areas they need to improve and how to implement their action plan AMI Certified The Service Advisor Seminar is AMI certified Participants who complete the seminar will receive four credits toward their AAM designation The Automotive Management Institute s AMI Accredited Automotive Manager AAM designation is the first business management accreditation exclusively for the automotive service professional How to Enroll Visit acdelcotechconnect com to enroll online and click on the Training link to go to the Training Delivery System Registration is required to enroll online From the Training Delivery System web site main menu select Professional Development and then Student Enrollment To enroll by phone call the ACDelco Enrollment Center at 1 800 825 5886 When calling to enroll in a course you will need your ACDelco account number the last four digits of the social security number of the enrolling student and the course number date and location Thanks to Tracy Betakas Calling All Real Car Guys ACDelco s highly anticipated 2005 Pride of the Real Car PRIDE REAL CAR GUYS Guys contest is almost underway Want to be featured Enter a photo of your vehicle along with the on li
17. formance Two possible causes are a cracked broken or leaking 2 3 shift solenoid and a stuck or hung up 2 3 shift valve Another possible cause Is chips or debris plugging the filtered AFL oil at orifice 29 on the top of the spacer plate Because this ori fice is so small it can be plugged by a very small amount of foreign material Remove the Spacer plate and inspect orifice 29 and the imme diate area for the presence of chips or debris Also inspect the trans mission case passage directly above this orifice and the valve body pas sage directly below Clean the area of any chips or debris found TTT 10 20 Typical debris Location of debris in spacer plate orifice 29 Refer to GM bulletin 01 07 30 036D for more information Duramax Diesel 6 6L Diagnostic Tips Here are some diagnostic tips you may find useful when diagnosing driveability con cerns on the Duramax 6 6L diesel engine Misfire If there is a misfire code or a misfire can be detected during operation connect a scan tool and look on the Engine Data 2 list to find the Balancing Rates for the cylinders Do not use Balancing Rates to diagnose symptoms that do not occur at idle Use the fuel Injector Balance Test with a scan tool to diagnose symp toms at higher engine and vehicle speeds Balancing Rates Normal fuel delivery to each cylinder is around 1 cubic millimeter mm3 for the pilot injection and 7 mm3 for the main injection The balanci
18. include e Charge Mode e Fuel Economy Mode e Voltage Reduction Mode e Start Up Mode e Windshield De ice Mode e Battery Sulfation Mode The PCM ECM generator battery control module on full size trucks controls the genera tor through the generator L terminal control circuit It monitors the generator performance though the generator field duty cycle signal cir cult The signal is a 5 volt PWM pulse width modulated signal of 128 Hz with a duty cycle of 0 100 Normal duty cycle is between b 95 The ranges between 0 5 and 95 100 are for diagnostic purposes The accompany 1 Charge New Regulated Voltage Control System ing table shows the commanded duty cycle and output voltage of the generator The generator pro vides a feedback signal Duty a of the generator load Cycle Set Point Men gen al ield duty cycle signa z circuit to the control module The signal is a 5 volt PWM signal of 128 Hz with a duty 0 cycle of 0 100 Normal duty cycle is between 5 99 The anges 0 5 and 100 are for z diagnostic purposes Charge Mode The control module enters Charge Mode whenever one of the following conditions is met e Under WOT conditions and when the fuel rate sent by the ECM PCM is greater than 21 g s and the throttle position is greater than 90 The headlamps are on low or high beam The wipers are on for more than 8 seconds e The electric cooling fans are on high speed The rear defogger is on The
19. ing the connector be sure to use the splice sleeves provided due to the exposure to moisture Refer to ACDelco bulletin O5D J 069 GT 280 Connector which revises ACDelco bulletin O5D J 052 for more information Thanks to Dennis Kissack Possible Incorrect Placement of Inboard and Outboard Brake Pads The inboard pad right on the 17D 727 brake pad set can be identified by a taller center positioning tab and the wear indicator The inboard brake pad on 17D 727 brake pad sets can be installed in the out board position on 1997 2005 Chevrolet Malibu 1997 1999 Oldsmobile Cutlass and 1999 2004 Oldsmobile Alero and Pontiac Grand Am models The incorrect placement of the inboard pad in the outboard position on this design of caliper may result in caliper slide movement rapid pad wear possible binding and overheating of the brakes If the pads are incorrectly placed the caliper sliding action will be restricted and pad to rotor contact will always be pre sent contributing to pad wear and noise The outboard pad will not easily install in the outward mounting bracket ears but it can be forced into position Unlike many pads that have the wear indicator mounted on the outboard pad the wear indicator clip on the 17D 727 pad sets is installed on the pad that is mounted inboard There are several differences that can be noted to identify the inboard pad from the outboard pad The inboard pad with
20. ne entry form on acdelcotechconnect com explaining why ACDelco should highlight your ride in its 2006 Pride of the Real Car Guys calendar Entries will be accepted beginning June 1 through July 31 2005 For more contest details contact your local ACDelco representative ACDelco Sports Report NASCAR Busch Series Stock Car Racing Driver p is Clint Bowyer Car 2 Chevy Bs Tie di aoa Monte Carlo Richard Childress Racing Clint Bowyer is gunning for the lead in the Busch Series taking the 2 ACDelco car to two top 5 finishes and five top 10 finishes 2005 Driver Standings Points after 9 of 35 races 1 Carl Edwards 1418 3 Clint Bowyer 1229 IHRA Torco Racing Fuels Pro Modified Series Drag Racing Driver Harold Martin Car Pontiac Grand Am After a disappointing first race of the season Harold Martin came back strong at the IHRA Spring Nationals 2005 Driver Standings Points after 2 of 12 races 1 Quain Scott 181 7 Harold Martin 93 NHRA POWERade Pro Stock Series Drag Racing Driver Kurt Johnson Car Chevy Cavalier Kurt Johnson continues to challenge the leaders in the competitive 2005 NHRA POW ERade Pro Stock Series 2005 Driver Standings Points after 5 of 23 races 1 Dave Connolly 428 10 Kurt Johnson 230 CITGO BASSMASTER Tournament Trail Angler Ab Bete y Jimmy Houston Professional Angler Jimmy Houston has another strong year on the 20
21. ng rates are the measurements of the amount of fuel removed from or added to these normal fuel quantities during each combustion event Balancing rates are available and accurate only during stable idle These numbers tell you whether or not you have a possible com pression injector control or injector issue Once the misfire is detected the balancing 7 rate of the cylinder that has the misfire will be as high as 15 mm3 The misfire codes P0300 P0301 P0308 will set only after the first 90 seconds of engine operation on Federal RPO LB7 engines 30 seconds on California RPO LB7 engines and will set only when the balancing rate goes above 15 mm3 The normal values that should be seen on the balancing rate parameters will range be tween 4 0 and 4 0 in Neutral or Park 6 0 to 6 0 in Drive when the brake is fully applied Suspect a possible problem when the balanc ing rate of a particular cylinder starts to increase out of the normal operating range An example of a possible problem cylinder would be a balancing rate of 7 mm3 or so Once the numbers start to increase out of the nor mal range the cylinder is progressively con tributing less power than the other cylinders Diagnosing Fuel Knock Perform the diagnostics listed in the Fuel Knock symptom table of the service infor mation Vacuum Pressure Gauge The vacuum pressure gauge is also useful when diagnosing the Duramax 6 6L diesel In the case of a con
22. nsed provider is Recycled Fluid Technologies Conventional coolant may be recycled by utilizing a coolant recy cling service either at the service center or at an offsite facility Conventional coolant recycling also can be accomplished by techni cians using the proper recycling equipment and the inhibitor chemi cals supplied by the recycling equipment manufacturer For additional information about DEX COOL engine coolant refer to GM bul letin 00 06 02 006A DEX COOL Is available from ACDelco in one gallon containers part number 10 101 or 55 gallon drums part number 10 125 Thanks to Mark Spencer Coolant refractometer 75232 is an accurate measurement tool for determining the freeze point of coolant It compensates for coolant temperature and types unlike a gravity float tester or hydrometer With only a few drops of coolant the easy to read scale indicates the 3 freeze point showing below zero freeze protection at the top of the scale Coolant that does not offer the proper amount of freeze protection should be replaced The refractometer is available from Robinair through the Dealer Equipment program Call 1 800 336 6687 to order or for more information Thanks to Mark Spencer ACDelco Vehicle Service Contract siti Brings in New Business With millions of used cars and trucks being sold every year new owners truly enjoy the peace of mind that comes with a vehicle service contract to help c
23. ntamination DEX COOL was not developed to be used with conventional coolant Mixing DEX COOL and conventional coolant will degrade the extended service interval of DEX COOL This includes simple maintenance procedures such as sharing a fill drain container as well as top ping off a DEX COOL filled system with con ventional coolant or adding conventional coolant to the radiator If contamination between the two coolants does occur the cooling system must be flushed twice immediately and refilled with a 50 50 mixture of DEX COOL and clean water in order to pre serve the enhanced proper ties and extended service interval of DEX COOL Service The corrosion inhibitors in coolant are used up over time requiring the coolant to be changed in order to maintain cooling system protection With a cooling system filled with DEX COOL the coolant should be changed after 5 years 150 000 miles using a coolant exchanger With conventional coolant the sys tem should be changed every 2 years 30 000 miles Following these service intervals are critical to proper engine operation According to the U S Department of Transportation cool ing system failure is the leading cause of The measure of a coolant s freeze protec tion is its specific gravity which measures the relative weight of coolant concentrate to the weight of an equal volume of water By check ing specific gravity a reading of freeze protec tion also provides a measure o
24. over the cost of a variety of repairs Independ ent automotive dealers sell vehicle ser vice contracts to a number of customers but in many cases they don t have the service bays to perform repairs or the vehicle service contract program they are selling lacks strong financial backing These are the reasons ACDelco along with GMAC Insurance and Universal Warranty Corporation has put together the Vehicle Service Contract program The new Vehicle Service Contract pro gram gives TSS service centers e Increased and sustainable income e New customers for current business e Opportunities for additional service revenue The program brings new customers to your TSS service center for covered repair work as well as the opportunity for additional non covered repairs and future business all of which can lead to an expansion of your customer base for long term growth and profitability The Claims Process Here s how the program works An independent automotive dealer sells a customer an ACDelco Vehicle Service Contract If the vehicle experiences a cov ered breakdown the customer calls Universal Warranty Corporation and is directed to the nearest participating ACDelco TSS service center When the customer comes to your service center for the repair work you simply call Universal Warranty to verify the contract and attain autho rization for repairs After performing the covered repairs you collect the deductible amount from
25. processes that make up the customer service event are reviewed along with the skills required to manage those processes with high customer satisfaction Eight Areas of a Service Event The seminar covers how to manage eight areas of a service event with a cus tomer in order to ensure a high level of satisfaction Participants will cover e Identifying and fulfilling customer needs during the service process e Effective communication and listen ing skills e The customer experience and the importance of how a customer per ceives their service experience e The importance of connecting with customers through behavioral style behavior patterns and body language e Effective sales techniques using cus tomer oriented benefit statements and maintenance inspections and how to handle customer emotions e Writing a clear and concise repair order e Creating exceptional customer ser vice through delivery and follow up e Developing a personal action plan to use upon returning to the service center Developing an Action Plan At the end of the seminar participants will put together their own personal action plan that will help them to use what they have learned in the course to improve the customer service process In their service center They are asked to rate their skill level in the following areas e The service process e Effective communication skills e The customer experience e Connecting with customers e E
26. rates most of the scan tool parameters except load shed and idle boost as this system does not take corrective actions If there is a charging system error first check for related charging system and low volt age DTCs set in the control module In addition diagnose P codes first as these DTCs will set if there is a generator or control circuit failure If no DTCs are present refer to the Charging System test in the service manual If this test does not present a failure it may be necessary to test drive the vehicle and monitor the idle boost and load shed parameters This may lead you to some type of high load condi tion that may be normal compare to a known good vehicle Thanks to Jim Mauney and John Spidle Generator Battery Control 2005 Full Size Pickups and Module ECM PCM Utilities under 8600 GVW Battery Current Sensor 2005 Chevrolet Cobalt Buick BCM ECM PCM LaCrosse BCM PCM 2005 Pontiac Grand Prix and Grand Prix GXP Chevrolet Uplander Pontiac Montana Buick Terazza DEX COOL and Conventional Engine Coolant General Motors and Texaco introduced DEX COOL extend ed life coolant in 1995 Unlike propylene glycol based conven tional coolant this new coolant was ethylene glycol based and did not contain phosphates or silicates It used a patented long life organic corrosion inhibitor system that offered protec tion for the six basic metal alloys aluminum brass cast iron steel solder
27. re ACDelco product information on TechConnect features a TSS column with information about the program and its benefits would like more TSS program information on TechConnect covers the latest technical information from ACDelco and General Motors would like to see more in depth articles covering new technology including Would more articles about ACDelco training opportunities be helpful Would more articles about ACDelco promotions and marketing events be helpful Would you like to see more or less coverage of ACDelco motorsports Is there anything you would change or add to TechConnect to make it more useful for you A printable PDF of each issue of TechConnect is posted on acdelcotechconnect com Do you view TechConnect online or print out a copy Would you prefer to receive TechConnect electronically in an email or as a paper copy PRSRTD STD U S POSTAGE PAID DETROIT MI PERMIT NO 2621
28. rly trained technicians have the equipment tools safety instructions and know how to do a job properly and safely If a condition is described it cannot be assumed that the information applies to all vehicles or that all vehicles will have that condition All materials and programs described in this magazine are subject to change Submission of materials implies the right to edit and publish Inclusion in the publication is not necessarily an endorsement of the individual or the company TechConnect is published for ACDelco by Sandy Corporation Troy MI 2005 ACDelco All rights reserved Charge New Regulated Voltage Control System from page 1 When one of these conditions is met the control module ramps up the voltage slowly to a level between 13 4 to 15 5 volts depending upon the mode of operation the system is pre sently in at a rate of 8 mV to 50 mV per second Fuel Economy Mode he control module enters Fuel Economy Mode when the follow ing conditions are met e The calculated ambient air temperature is above 0 C 32 F e The calculated battery current is less than 15 amperes and greater than 8 amperes e The battery state of charge is greater than 80 e The generator field duty cycle is less than 99 Its targeted generator output voltage is 13 0 volts The control module will exit this mode once the criteria are met for Charge Mode Voltage Reduction Mode he control module will en
29. roup Warehouse Distributor in your area The seminar covers Information to reduce costly comebacks Cooling system updates New tool and equipment releases Industry and governmental trends The latest technical bulletins Seminar handouts provide a ready resource to correct this year s vehicle problems In addition the condensed overview of benefits and options available through new equip ment tools and parts encourages informed customer service To sign up for the 2005 Air Conditioning seminar contact your ACDelco DDG repre sentative Thanks to Jim Resutek How to Manage the Customer Service Process Service Advisor Seminar Focuses on Customer Satisfaction Think for a second about all of the steps you take in handling one customer who is in your service center for a repair How many did you count A successful service experience goes beyond simply greeting the customer making a diagno sis performing the repair work and deliv ering the vehicle But do you know what you re missing And are the things that you re missing the critical steps needed to ensure customer satisfaction and develop a loyal customer It is the complete customer service process that is the focus of the ACDelco Business Management Training Service Advisor Seminar The one day seminar BT 4 01 is for TSS service center service advisors as well as employees who may become service advisors Throughout the course the various steps and
30. sue fea tures a wide range of topics covering information and programs trom ACDelco GM TSS program partners tool suppliers and more Now we d like to get your thoughts Send us an email answering the following questions Your feedback and ideas will help in developing future issues of TechConnect that will cover the auto motive service news and information you want most As a way of saying thanks for participating in the survey we ll give a premium ACDelco stain less steel travel mug to 10 participants selected from a random drawing of all email responses Please respond before June 30 2005 to be eligible for the random drawing Please reply to the following 10 questions and number your answers 1 10 With your survey response Include your e Name e Title e TSS service center e Address e Phone number Send your feedback via email to Mark Spencer technical editor at mark soencer sandycorp com Your input and opinions are very important to us Thanks for taking the time to let us know how we re doing ACDelco ACDelco TechConnect P O Box 500 Troy MI 48007 0500 Change Service Requested TSS PU 0112 05 Please answer the following questions ils 10 What do you find most useful about TechConnect A ACDelco product news and information B TSS program information C Automotive technology articles D Other TechConnect covers a variety of ACDelco product information would like mo
31. ter Voltage Reduction Mode when the following conditions are met e The calculated ambient air temperature is above 0 C 32 F e The calculated battery current is less than 2 amperes and greater than 7 amperes e The generator field duty cycle is less than 99 Its targeted generator output voltage is 12 9 volts The control module will exit this mode once the criteria are met for Charge Mode Start Up Mode After the engine has start ed the control module sets a targeted genera tor output voltage of 14 5 volts for 30 seconds Battery Sulfation Mode The control mod ule enters this mode when the battery voltage is less than 13 2 volts for 45 minutes Once in this mode the generator battery control mod ule will set a targeted output voltage between 13 9 to 15 5 volts for 5 minutes The control module will then determine which mode to enter depending on voltage requirements RVC Mode The control module bases the charging voltage on battery state of charge SOC Battery SOC is estimated during a key off event every 8 hours after 3 voltage mea surements every 24 hours thereafter and then monitored constantly while the ignition Is on These measurements of voltage are then com pared to estimated battery temperature as battery temperature vs battery voltage directly corresponds to battery SOC While the engine is running the system uses both the battery voltage and estimated battery temperature to determine the
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