• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
Compass Voltage | 1 | 1 | -- | -- |
Compass LIN 3 | 1 | 1 | 1 | -- |
Compass Ground | -- | 1 | 1 | -- |
1. Compass Malfunction |
The compass module communicates with the body control module (BCM) through the local interconnect network 3 (LIN) data circuit. The instrument panel cluster (IPC) receives compass information from the BCM via the serial data circuit. The IPC displays compass information in the driver information center (DIC).
• | Check for aftermarket equipment installed or personal items that could create a magnetic field that could affect the performance of the compass. |
• | Cycle the ignition before performing the compass magnetic variation adjustment procedure. |
• | Check that the compass module is properly installed in the vehicle. The embossed arrow on the module should be parallel with the centerline of the vehicle. |
Driver Information Center (DIC) Description and Operation
Control Module References for scan tool information
Ignition ON, compass ON, verify that there is a correct compass reading on the DIC.
⇒ | If the compass is incorrect, refer to Compass Display Is Incorrect. |
⇒ | If the compass shows CAL, refer to Compass Displays CAL. |
⇒ | If the compass displays "- -" (dashes) or is blank, refer to Compass Displays No Heading. |
⇒ | If the compass is still incorrect, perform the compass magnetic variation adjustment procedure. Refer to Compass Calibration and Magnetic Variance. |
⇒ | If greater than the specified range, test the circuit for a short to voltage or an open/high resistance. |
⇒ | If the test lamp does not illuminate, repair the circuit for a short to ground or an open/high resistance. |
⇒ | If less than the specified range, test the LIN 3 data circuit for a short to ground. |
⇒ | If the test lamp illuminates, test the LIN 3 data circuit for a short to voltage. |
⇒ | If greater than the specified range, repair the LIN 3 data circuit for an open/high resistance. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for compass module replacement, setup, and programming