Pinpoint Test BB: The Compass Is Inaccurate

Instrumentation, Message Center and Warning Chimes

Pinpoint Test BB: The Compass Is Inaccurate

Normal Operation

The compass module (integral to the auto-dimming interior mirror) provides vehicle directional inputs to the Instrument Cluster (IC), which sends the compass information to the Front Display Interface Module (FDIM) over the Medium Speed Controller Area Network (MS-CAN). The FDIM (Front Display Interface Module) displays the compass direction according to the information that has been provided by the compass module to the IC (Instrument Cluster).

This pinpoint test is intended to diagnose the following:

- Compass zone setting

- Compass calibration

- Compass module (integral to the auto-dimming interior mirror)

PINPOINT TEST BB : THE COMPASS IS INACCURATE

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

BB1 SET THE ZONE AND CALIBRATE THE COMPASS

- Set the zone. Refer to Compass Zone Adjustment .

- Calibrate the compass. Refer to Compass Calibration .

- Observe the compass display with the vehicle pointing in several different directions.

Direction Compass Display North N Northeast NE East E Southeast SE South S Southwest SW West W Northwest NW

Does the compass display correctly for the direction the vehicle is pointed?

Yes
The compass is OK. The concern may have been caused by an incorrect zone setting, or the compass was out of calibration.

No
INSTALL a new compass module (integral to the auto-dimming interior mirror). SET the zone. REFER to Compass Zone Adjustment . CALIBRATE the compass. REFER to Compass Calibration . TEST the system for normal operation.