The compass display is contained in the front display interface module (FDIM). For the FDIM, refer to INFORMATION AND ENTERTAINMENT SYSTEMS article. For early build vehicles, the compass module is attached to the interior rear view mirror and is replaced separately from the mirror. For late build vehicles, the compass module is integrated into the interior rear view mirror. Refer to REAR VIEW MIRRORS article. The MODE button that allows the driver to operate the calibration and zone setting procedures is located on the top left of the compass module for early build vehicles and on the center bottom of the interior rear view mirror for late build vehicles. The vehicle heading is displayed as a 1 or 2 character display located in the lower left hand side of the FDIM and indicates the current direction of the vehicle (N, NE, E, SE, S, SW, W, or NW). The compass continuously recalibrates due to changes in the magnetic field and remains accurate during most driving conditions. The compass display is on with the key in the ON or START positions. When the key is first turned to the ON or START position, there is a momentary delay of approximately 6 seconds before the compass display illuminates. If the battery saver has been activated and the key is turned to ON or START, the momentary delay before the compass display illuminates is approximately 3 seconds. The compass display will turn off as soon as the key is turned to the OFF or ACC positions.
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) through circuit SBP14 (BN/RD). Ground for the compass display is supplied through circuit GD114 (BK/BU). The compass module 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 will display the compass direction according to the information that has been provided by the compass module to the IC.
- DTC B2097 (Compass Module Failure) - sets when the IC attempts a self-test of the compass module and its associated circuits and a failure results.
- DTC U0155 (Lost Communication With Instrument Panel Cluster [IC] Control Module) - sets when the FDIM does not receive any network communication messages over the MS-CAN network between the IC and the FDIM.
- DTC U2013 (Compass Module is Not Responding) - sets when the IC does not receive any communications from the compass module.
This pinpoint test is intended to diagnose the following
- Fuses
- Wiring, terminals or connectors
- Compass module
- FDIM (compass display)
- IC
The compass display (located in the front display interface module [FDIM]) receives battery voltage from the smart junction box (SJB) fuse 14 (10A) through circuit SBP14 (BN/RD). Ground for the compass display is supplied through circuit GD114 (BK/BU). The compass module (located on [early build], or integral to [late build] 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 will display 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
- Magnetized vehicle
- Compass zone setting
- Compass calibration
- Compass module