Q&A

 Enthusiast

TECHNICAL

Bulletin No.: 10-08-50-001

Date: February 15, 2010

Subject: No Crank, No Start, Discharged or Low Battery (Reprogram Heated Seat Module)

Models:
2006-2010 Chevrolet Impala
2007-2009 Chevrolet Equinox
2007-2009 Pontiac Torrent
Equipped with Front Heated Seats

Condition

Some customers may comment on a no crank, no start, discharged or low battery.

Note
This condition may be intermittent, therefore it is important to check if a revised calibration has been released on TIS2WEB for this concern, even if the condition cannot be duplicated at the dealer.

Cause

This condition may be caused by the heated seat module discharging the battery. The module keeps the serial data bus active, which creates a cumulative, continuous amperage draw on the battery after the vehicle is shut down, until the state of charge reaches three volts.

Correction

Important
DO NOT replace the heated seat module or the battery for this concern.

Reprogram the heated seat module with the latest software calibration.

Important
Select the correct calibration files for the appropriate vehicle configuration (body style) and RPO codes.

A revised calibration has been developed to address this condition. Technicians are to reprogram the heated seat module using the Service Programming System (SPS) with the latest software available on TIS2WEB. Refer to the Service Programming System (SPS) procedures in SI.

When using a Tech 2(R) or a Multiple Diagnostic Interface (MDI) for reprogramming, ensure that it is updated with the latest software version.

During programming, the battery voltage must be maintained within the proper range of 12-15 Volts. Only use the approved Midtronics(R) PSC 550 Battery Maintainer (SPS Programming Support Tool EL-49642) or equivalent during programming.

Warranty Information

For vehicles repaired under warranty, use the table above.

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