TAC Tips Winter 2017-18

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.

February 27, 2018
Thanks to our program member from: Jonquière, QC
Vehicle: 2012 Ford F-150
Condition: Starter does not turn and does not start, battery completely discharged, 3 amp battery drain detected. P.C.M was reprogrammed without success
Agent recommendation: Recommend removing fuse # 18 from the B.C.M to see if this reduces the parasitic drain.
Solution: Replaced the B.C.M module, wire from fuse # 18 kept the P.C.M awake and caused excessive drain.

February 20, 2018
Thanks to our Program Member from: Thurso, QC
Vehicle: 2008 Chevrolet Uplander
Condition: Cooling fan always on at high speed. No DTC.
Agent recommendation: Check A / C pressure sensor as the PCM receives a request to activate the fans.
Solution: Recover refrigerant, since a stop leak was added in the a/c system and this caused blockages and restrictions causing high pressures that operate the fans at high speed.

February 13, 2018
Thanks to our Program member from: Hamilton, ON
Vehicle: 2008 Chevrolet Silverado 3500 6.6 L Diesel
Condition: Customer complained the ‘change oil’ light continues to appear, much before engine oil is due. 
Agent recommendation: Re-flash E.C.M and do D.P.F regen.
Solution: Re-flashed E.C.M and did D.P.F regen and no longer an issue.

February 6, 2018​
Thanks to our Program member from: Perth, ON
Vehicle: 2008 Nissan Frontier 4.0 L
Condition: Vehicle came in with DTC P0171. Technician cleared code and was unable to duplicate problem. O2 sensor has already been replaced.
Agent recommendation: Check the M.A.F sensor as there have been cases with similar issues.
Solution: MAF sensor replaced.

January 30, 2018
Thanks to our Program member from: Calgary, AB
Vehicle: 2010 GMC Terrain 2.4 L
Condition:  Technician replaced timing chain, guides and tensioner and now hears a whining noise.  Looking to confirm if PIP3535A document would apply to the vehicle. Balance shaft chain was tight.
Agent recommendation: Balance shaft chain would be the place to start as it describes the symptoms.
Solution: Balance shaft chain was too tight.

January 23, 2018
Thanks to our Program member from: London, ON
Vehicle: 2010 Mercedes-Benz B200
Condition: A/C system, wiper motor and SRS system not operating.
Agent recommendation: Check relays behind the glove box that pertain to circuit and swap it out with a good known relay.
Solution: Replaced relays behind glovebox.
January 16, 2018
Thanks to our Program member from: London, ON
Vehicle: 2011 Honda CRV
Condition: Alarm goes off intermittently when armed.
Agent recommendation: Check hood switch and wiring from switch.
Solution: Replaced hood switch.
January 9, 2018
Thanks to our Program member from: Lac La Biche, AB
Vehicle: 2007 Cadillac Escalade 6.2 L
Condition: Engine has DTCs P0171 P0174 C0561 and surges intermittently. Fuel pressure is good. MAF sensor replaced. Has A/M cold air intake.
Agent recommendation: Check PCV hose for cracks and harness underneath the vehicle close to the driveshaft for chaffing.
Solution: Removed A/M intake and replaced with original.

January 2, 2018
Thanks to our Program member from: Kemptville, ON
Vehicle: 2012 Chevrolet Cruze 1.8 L
Condition: Technician called regarding a P0011 DTC. He tried swapping out camshaft solenoids from intake to exhaust  and issue was still there.
Agent recommendation: Suggest to follow instructions on TSB PIP4543D about a possible actuator issue with vehicle.
Solution: Replaced actuators
December 26, 2017
Thanks to our Program member from: Sarnia, ON
Vehicle: 2000 Honda Odyssey 
Condition: Has multiple misfire codes and P1399
Agent recommendation: Suggest to check spark plugs and coils. Also check if EGR ports are clogged.
December 19, 2017
Thanks to our Program member from:       Bruce Mines, ON
Vehicle: 2011 Kia Sorento 2.4 L
Condition: Truck has been left with battery charger overnight and since that it won't start, it cranks but won't start, has injector pulse, but seems to be flooding engine.
Agent recommendation: Suggest to check ECM for problem with injector drivers that could have been shorted out by charger overcharging during the night.
Solution: ECM was replaced and reprogrammed and truck is now working fine.
December 12, 2017
Thanks to our Program member from:   Timmins, ON
Vehicle:  2004 GMC Sierra 2500 HD
Condition: Torque converter lock-up won't stay applied while driving on highway, and has code P0300 in PCM                                                                                                                           
Agent recommendation: Do the CKP variation relearn procedure, since this is the first steps in GMSI
Solution: CKP variation relearn process done several times.

December 5, 2017
Thanks to our Program member from: Stratford, PEI
Vehicle: 2007 Mazda CX7 2.3 L Turbo
Condition: Engine has code for MAF sensor and no power, even when code is erased it still has no power.
Agent recommendation: Check turbocharger, and also for intake leaks with smoke detector and also exhaust restriction, and turbo boost and if turbo shows signs of wear, make sure the oil feed line and return line aren't restricted
Solution: turbo was replaced since no sufficient boost is found when performing the boost test

TAC Information 

We’re listening! ACDelco’s TAC team listens because they know how frustrating it can be to get good sound advice when it comes to vehicle diagnostics.

It pays to get it done right, and fast - the first time!
That’s the objective for all of our ACDelco Technical Assistance Centre licensed technicians. To get your problem diagnosis dealt with quickly and correctly…and of course, to just be there to listen.

ACDelco Technical Assistance Centre – Diagnostic Hotline
Live Technical support via phone – available 60 hours a week!
Contact the ACDelco Info-Line for further details. 1-800-263-3526 prompt 2

The ACDelco TAC line is fully staffed with multi-lingual technicians Monday – Friday from 8am-6pm EST, ensuring they are available to take your call (or fax, or email). In English or French, our qualified TAC agents will be ready to answer your questions.

The TAC line uses the most advanced technology and current repair databases, in addition to detailed case information and data mining. Our agents have full access to common failure causes and repair procedures databases. Access to these cases can help solve the most complex requests.

Our TAC Specialists
ACDelco’s TAC line has master technicians supporting Domestic, European and Asian import vehicles. Agents have an impressive 45 years combined hands on experience. The breadth of experience includes:

  • Working directly with vehicle manufacturers and aftermarket suppliers
  • Class training delivery
  • Field experience
  • Auto body and collision repair
  • Heavy-duty and military powertrain experience. 

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.

Systems Support
ACDelco’s TAC agents have a lengthy list of technical resources and databases to support your complex questions. This includes factory OE information, as well as internal technical experts, field engineers, product specialists, and technical writers for several OEM's.

Resource databases include all major all makes manufacturers. Additional repair databases include Alldata, IATN, Mitchell1, Automotive Service Profession, eSI and more.
Access to Service Technical Specialists include the following manufactures: GM, Mercedes Benz, VW, Audi, Ford, Lincoln, Mercury, Chrysler, BMW, Volvo, Honda, Nissan, SAAB, Toyota, Hyundai, & KIA.