Cobalt L4-2.0L SC VIN P (2005)
Instrument Panel Control Module: All Technical Service Bulletins
Instruments - Gauges Inoperative/Speedo Offset From Zero
Bulletin No.: 05-08-49-020
Date: June 23, 2005
TECHNICAL
Subject:
Instrument Panel Cluster (IPC) Gauges Inoperative - Speedometer Off set From Zero, Erratic Tachometer, Fuel Gauge Erratic (Reprogram IPC)
Models:
2005 Chevrolet Cobalt
2005 Pontiac Pursuit (Canada Only)
Condition
Some customers may comment that the instrument panel gauges appear to lose their position or are inoperative.
Cause
A software anomaly within the IPC has been found. If battery voltage drops as a result of a slow drain, the IPC will reset.
Upon exiting reset, the IPC will move the speedometer pointer by 10 degrees. Each time the IPC resets, the speedometer pointer will move an additional
10 degrees. The speedometer will off set between 10 to 340 degrees total. Once the battery voltage begins to rise, the fuel and tachometer pointers will
move up by 10 degrees.
Correction
Important:
Programming the IPC must be done PASS-THRU ONLY.
Technicians are to reprogram the IPC with an updated software calibration. This new service calibration was released with TIS satellite data update
version 6.5 available June 13, 2005. As always, make sure your Tech 2(R) is updated with the latest software version.
Warranty Information
For vehicles repaired under warranty, use the table.
Disclaimer
