B0931

DTC B0931

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.



DTC Descriptor
DTC B0931
- Compass Sensor Circuit Malfunction




Diagnostic Fault Information






Circuit/System Description

The internal fault detection of the electronic compass module is handled by the instrument panel cluster (IPC). The compass information is sent to the IPC via 2 discreet inputs from the electronic compass module. The IPC displays compass information in the driver information center (DIC). The DIC displays 2 dashes (- -) when the IPC looses connection with the electronic compass module.


Conditions for Running the DTC

The IPC monitors the analog input value at power up.


Conditions for Setting the DTC

When communication with the compass module exists but the IPC does not detect valid data from the electronic compass module or the compass error flag is set.


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 IPC no longer detects a failure.
* The history DTC clears after 100 fault-free ignition cycles.



Reference Information
Schematic Reference

* Driver Information System Schematics (Driver Information System Schematics)
* Instrument Cluster Schematics (Instrument Cluster Schematics)

Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Driver Information Center (DIC) Description and Operation (Description and Operation)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Control Module References (Programming and Relearning) for Scan Tool Information


Circuit/System Verification

1. Verify that DTC B0931 is not set.

• If the DTC is set, calibrate the electronic compass module. If the DTC resets, replace the electronic compass module.




Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Electronic Compass Calibration (Programming and Relearning)
* Control Module References (Programming and Relearning) for the electronic compass module replacement, setup and programming