Driver Information Center (DIC) Compass Inaccurate or C Displayed

Driver Information Center (DIC) Compass Inaccurate or C Displayed

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.



Circuit/System Description

The compass information is displayed in the driver information center (DIC). The electronic compass module interfaces with the DIC via the compass data signal circuit and the compass clock signal circuit. The two circuits function as a dedicated serial data communication link between the electronic compass module and the DIC. The communication link is a two-wire bi-directional link between the DIC and the electronic compass module only. The DIC controls the compass clock signal circuit used for reading and writing data. The compass data signal circuit is used to transmit data between the DIC and the electronic compass module. The electronic compass module internal fault detection is handled by the DIC and if the DIC does not receive a valid compass information from the electronic compass module, the DIC blanks the compass display.


Reference Information
Schematic Reference

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

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 Testing

1. Ignition ON, verify that the DIC compass does not display "C" or "CAL".

• If the DIC compass displays "C" or "CAL", perform the Compass Calibration and Magnetic Variance procedure. Refer to Electronic Compass Calibration (Programming and Relearning) .

2. Verify that the DIC compass display is not blank.

• If the DIC compass display is blank, replace the DIC.




Repair Instructions

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


Control Module References (Programming and Relearning)for the DIC or electronic compass module replacement, setup, and programming