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Pinpoint Test AF: The Compass Is Inoperative (Without Sync®): Notes

Pinpoint Test AF: The Compass Is Inoperative (Without SYNC®) 

Refer to Wiring Diagrams Instrument Panel Cluster for schematic and connector information.

Normal Operation 

The Instrument Panel Cluster (IPC) receives the compass display message from the Body Control Module (BCM) over the High Speed Controller Area Network (HS-CAN). The BCM receives the compass display message from the auto-dimming interior mirror over the Local Interconnect Network (LIN) communication bus. The BCM is only a gateway for the compass information and does not control the compass display. The auto-dimming interior mirror receives voltage from the BCM fuse 32 (15A).

If the compass display message is missing or invalid for 5 seconds or less, the compass displays the last vehicle direction based upon the last known good compass display message received. If the compass display message is invalid or missing for 5 seconds or more, the IPC defaults the display to all dashes (---).

This pinpoint test is intended to diagnose the following: 

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