Diagnostic Tip - Vehicle Start And Stalls After Theft Deterrent Module Replacement (PIT5028B)

Publication date: 2015-04-21
Reference number: PIT5028B

DIAGNOSTIC TIP - VEHICLE START AND STALLS AFTER THEFT DETERRENT MODULE REPLACEMENT

TECHNICAL SERVICE BULLETIN

Reference Number(s): PIT5028B, Date of Issue: April 21, 2015

AFFECTED MODEL(S):

2008 - 2012 Buick Enclave, Cadillac CTS; 2006 - 2011 Buick Lucerne, Cadillac DTS; 2007 - 2009 Cadillac SRX, Chevrolet Equinox, Pontiac Torrent; 2007 - 2012 Cadillac Escalade, ESV, EXT, Chevrolet Avalanche, Express, Silverado, Suburban, Tahoe, GMC Acadia, Savana, Sierra, Yukon, Yukon Denali, Yukon XL, Yukon Denali XL; 2011 - 2012 Chevrolet Caprice PPV; 2006 - 2012 Chevrolet Impala; 2006 - 2007 Chevrolet Monte Carlo; 2009 - 2012 Chevrolet Traverse; 2008 - 2011 Hummer H2; 2008 - 2009 Pontiac G8; 2007 - 2010 Saturn Outlook; 2008 - 2010 Saturn VUE

SUPERCEDES:

This PI was superseded to update Models and Subject Line. Please discard PIT5028A.

SERVICE INFORMATION

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

CONDITION/CONCERN

Some technicians may notice that the vehicle starts and stalls on the first initial start after the replacement of the Theft Deterrent Module (TDM).

The vehicle will usually start up right away on the next start attempt unless you remove the key for 2 minutes and the ECM and TDM are allowed to power down.

There are usually no codes set in the TDM or the Engine Control Module (ECM

This may be caused by the Manufactures Enable Counter (MEC) in the TDM not being set to zero during SPS programming. If the MEC is not at zero, the vehicle may start and stall on the first start attempt.

NOTE: This PI doesn't apply to vehicles with Keyless Access System

RECOMMENDATION/INSTRUCTIONS

The MEC status can be read using the Tech 2. The MEC is found under Module ID Information for the Theft Deterrent Module.

If the Manufactures Enable Counter displays a number other than zero, the MEC counter will need to be reset.

To reset the MEC counter, the ignition key can be cycled the number equal to the MEC counter.

For example: if the MEC counter is 85, then the ignition key would have to be cycled 85 times. If you are monitoring the MEC counter while cycling the key, you have to back out of the Tech 2 menu where the MEC counter is displayed and then go back into the previous screen to refresh the MEC.

WARRANTY INFORMATION

There is not a labor time or labor operation associated with this PI because the labor time is considered part of the original repair.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.