Pinpoint Test B: The Compass Is Inaccurate

Electronic Compass

Pinpoint Tests

Pinpoint Test B: The Compass Is Inaccurate

NOTE: This pinpoint test is for vehicles without navigation. For vehicles with navigation, refer to Accessories and Optional Equipment.

Normal Operation

The compass display (located in the Front Display Interface Module (FDIM)) receives battery voltage from the Smart Junction Box (SJB) fuse 14 (10A). The compass module (integral to the interior rear view mirror) provides vehicle directional inputs to the Instrument Cluster (IC), which sends the compass information to the FDIM over the Medium Speed Controller Area Network (MS-CAN). The FDIM displays the compass direction according to the information that has been provided by the compass module to the IC.

This pinpoint test is intended to diagnose the following:

- Compass zone setting
- Compass calibration
- Compass module




PINPOINT TEST B: 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.

-------------------------------------------------
B1 CHECK THE COMPASS ACCURACY



- Set the zone. Refer to Compass Zone Adjustment Compass Zone Adjustment.
- Calibrate the compass. Refer to Compass Calibration Compass Calibration.
- Position the vehicle and observe the compass display as follows:





- Does the compass display as indicated?

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 interior rear view mirror). REFER to Interior Rear View Mirror in Mirrors. ADJUST the zone setting. REFER to Compass Zone Adjustment Compass Zone Adjustment. CALIBRATE the compass. REFER to Compass Calibration Compass Calibration. TEST the system for normal operation.

-------------------------------------------------