Electrical - Battery Dead/No Start/No Crank

TECHNICAL

Bulletin No.: 09-08-50-002A

Date: September 09, 2009

Subject: Vehicle Will Not Crank/Start, Battery Goes Dead, Four Amp Draw From Memory Seat Module (MSM) (Reprogram MSM)

Models:
2008-2009 Cadillac CTS, CTS-V
Built Prior to VIN Breakpoint 90160070
Equipped With EZ-Key RPO UHA, UHF

Supercede:
This bulletin is being revised to provide a VIN breakpoint. Please discard Corporate Bulletin Number 09-08-50-002 (Section 08 - Body and Accessories).

Condition

Some customers may comment that the vehicle will not crank or start and the battery goes dead.

If battery electrical drain/parasitic load testing is performed while the condition is present, a four amp draw can be traced to the memory seat module (MSM). The draw will be present until the battery goes dead, the MSM power is disconnected, or the 1 or 2 memory switch on the driver door is pressed.

Cause

This condition may be caused by a software conflict within the MSM that causes the low speed GMLAN bus to stay awake if the vehicle detects keyless transmitter number 3 or number 4 and the memory seat recall/easy exit recall is set to ON in the driver information center (DIC).

Note
This condition will only happen if all three of the conditions listed below are true.

- The vehicle has the EZ-key option (RPO UHA, UHF).
- The memory seat/easy exit recall is set to "On" or "Automatic On".
- A fob driver ID of greater than number 2 is used.

Correction

- A revised calibration has been developed to address this condition.
- Reprogram the MSM using the Service Programming System (SPS) with the latest calibration available on TIS2WEB. Refer to the SPS procedures in SI.
- During programming, the battery voltage must be maintained within the proper range of 12-15 volts. Only use the approved Midtronics(R) PSC550 Battery Maintainer (SPS Programming Support Tool EL-49642) or equivalent during programming.
- When using a Tech 2(R) for reprogramming, ensure that it is updated with the latest software version.
- When using a multiple diagnostic interface (MDI) for reprogramming, ensure that it is updated with the latest software version.

Warranty Information





For vehicles repaired under warranty, use the table above.





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