GM Service Manual Online
For 1990-2009 cars only

Circuit Description

The internal fault detection is handled by the instrument panel cluster (IPC).

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC B0931 Compass Sensor Circuit

Conditions for Running the DTC

The IPC monitors the analog input value at power up.

Conditions for Setting the DTC

The IPC does not detect the compass sensor. This may be due to a faulty sensor.

Action Taken When the DTC Sets

The DTC will be set and stored in non-volatile memory.

Conditions for Clearing the DTC

    • The DTC becomes history when the driver information center (DIC) no longer detects a failure.
    • The history DTC clears after 100 fault-free ignition cycles.
    • The DIC receives the clear code command from the scan tool.

Step

Action

Yes

No

Schematic Reference: Instrument Cluster Schematics

Connector End View Reference: Instrument Panel, Gages, and Console Connector End Views

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in DTC Information

2

Replace the instrument panel cluster (IPC). Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 3

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3

  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.

Does the DTC reset?

Go to Step 2

System OK