TAC Tips Fall 2017

We are resolving a number of cases every day and wanted to share some of the great conversations and tips we’ve had from across the country. Follow-up on Twitter or Facebook for a regular update.

Contributor: ACDelco’s Daily TAC Tip comes from the team at ACDelco’s Technical Assistance Centre.

November 28, 2017
Thanks to our Program member from:     Sarnia, ON
Vehicle:  2011 GMC Savana 2500 4.8 L
Condition: Truck won’t start, many U codes found and cannot communicate with ABS module
Agent recommendation: Check pin 6 and 14 at DLC connector for 60 ohms resistance and if not OK disconnect ABS module and retest
Solution: Technician found damaged ground at right rear of engine. Repaired and all communication restored and truck started.

November 21, 2017
Thanks to our Program member from:    Balmoral, NB
Vehicle: 2012 Honda Civic 1.8 L
Condition:  Vehicle will intermittently feel like stalling but immediately run again-No DTC
Agent recommendation: Check MAF sensor may be faulty and air intake tube for leaks.
Solution: Cracked air intake tube was replaced.

November 14, 2017
Thanks to our Program member from:       Guelph, ON
Vehicle: 2009 GMC Acadia
Condition: Vehicle was towed in and stalled on road and no cranks no start condition, has codes U0073, P0700, and P069E  
Agent recommendation: check the DLC pin 6 and 14 for total resistance of GMLAN high speed of 60 ohms, and go from there and see if FPCM or TCM is not shorting out the GMLAN
Solution: truck has been sent to dealer because issue was FPCM being bad and would need reprogramming.
November 7, 2017
Thanks to our Program member from:   Perth, ON
Vehicle:  2005 Ford F550 6.0L Diesel
Condition:   No start when hot, starts OK cold and runs all day, but if stopped when hot it won't restart, ICP pressure when hot is only 380psi and takes 500psi to start.                                                                                                                                           
Agent recommendation: check the oil filter anti drain back valve in the oil filter base and replace it as needed since this is causing a drain back of the oil in filter and not having oil when trying to restart and since the oil pressure gauge in the dash doesn't move up when attempting to start it when hot it may be the issue.
Solution: 2 injectors were leaking oil pressure at top O-rings and replaced.

October 31, 2017
Thanks to our Program member from:     Mitchell, ON
Vehicle:  2014 Chrysler Town and Country
Condition: Vehicle died while customer was driving. Vehicle has 12 volts but no crank no start. Technician had it towed to shop and did a hard reset on vehicle and now it starts.
Agent recommendation: Recommend replacing wireless ignition node (WIN/WCM).
Solution: Replaced (WIN/WCM)

October 24. 2017
Thanks to our Program member from:     Kingston, ON
Vehicle: 2006 Cadillac CTS
Condition: No start, no crank, multiple DTCs U1192, U1016, U1301
Agent recommendation: Recommend reprogramming VTD module.
Solution: Replaced VTD module.

October 17, 2017
Thanks to our Program member from:    Brampton, ON
Vehicle: 2010 Landrover LR2
Condition:  Vehicle was in an accident and now will not start. DTC B10A2 in the BCM also.
Agent recommendation: Found a TSB which requires BCM to be reprogrammed in the event of an accident.
Solution: Reprogram BCM.
October 12, 2017
Thanks to our Program member from:   Brownsburg-Chatham, QC
Vehicle:  2006 Chevy Colorado
Condition: Vehicle will not start or run good intermittently. Fuel pressure is good. Vehicle will run when hooked up to injector cleaner.
Agent recommendation: Check for fuel contamination. 
Solution: Fuel contamination was reported.

October 5, 2017
Thanks to our Program member from:       Stratford, PEI        
Vehicle: 2007 Mazda CX-7
Condition: Passenger side window not working.
Agent recommendation: Recommend auto initialize before any diagnostics.
Solution: Auto initializing window solved the problem.

September 28, 2017
Thanks to our Program member from:     Carleton Place, ON
Vehicle:  2009 Chevy Corvette
Condition: Blower motor not working. Replaced with A/M blower motor multiple times.
Agent recommendation: Replace with OEM.
Solution: Replaced with OEM.

September 21, 2017
Thanks to our Program member from:     Stratford, PEI
Vehicle: 2005 Ford F150
Condition: Vehicle had an engine misfire and technician replaced coil. Now vehicle has a lack of power on acceleration.
Agent recommendation: Check for exhaust restrictions and spark plugs.
Solution: Catalytic converters were plugged.

September 14, 2017
Thanks to our Program member from:    Brampton, ON
Vehicle: 2006 Ford Freestar
Condition:  Wiper motors not working and Fuse 67 in under hood fuse box keeps blowing.
Agent recommendation: Bypassing smart box and seeing if wipers operate properly.
Solution: Technician replaced smart box and wipers operating properly.

September 7, 2017
Thanks to our Program member from:   Brebeuf, QC
Vehicle:  2007 GMC Acadia
Condition: DTC P0202, 203, 206
Agent recommendation: 
1. Install a Digital Volt ohm Meter (DVOM) that has a MIN/MAX mode to record the highest and lowest reading on the power wire going to injectors 2, 4 and 6. 
2. Check the power wire from the injectors to the under hood fuse block for opens, high resistance or poor connections. Injectors 2, 4 and 6 are powered up by one fuse, and injectors 1, 3 and 5 are powered up by a different fuse. All the injectors have their own control wire from the injectors to the Powertrain Control Module (PCM).
Solution: Found loose connector on under hood fuse block.

TAC Information 

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Daniel Bernard has 25 years of automotive technical experience both in the OE and aftermarket environments, as well as heavy duty trucks. His background includes technician, warranty administration, technical training, dealer tool development and validation, technical assistance center support. Daniel provides technical training and support services in French and English.

Daniel (Dan) Mariani has 21 years of automotive technical experience with experience in both the OE and aftermarket environments. He is Honda certified and holds certificates in Automotive Service, Mechanical – Tool & Die Maker, and Architectural Technology.

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