Pinpoint Test G: The Rear Video Mirror Display Is Always On (Vehicles Without Navigation)

Parking Aid - Video

Pinpoint Test G: The Rear Video Mirror Display Is Always On (Vehicles Without Navigation)

Normal Operation

With the transmission selector in REVERSE (R), a reverse signal message from the Body Control Module (BCM) is sent over a dedicated Local Interconnect Network (LIN) to the auto-dimming interior mirror, enabling the system. The video signal from the rear video camera displays an image on the left portion of the auto-dimming interior mirror display.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- Auto-dimming interior mirror

PINPOINT TEST G : THE REAR VIDEO MIRROR DISPLAY IS ALWAYS ON (VEHICLES WITHOUT NAVIGATION)

G1 CHECK THE REVERSING LAMPS OPERATION

- Check the operation of the reversing lamps.

Do the reversing lamps operate correctly?

Yes
DISCONNECT any aftermarket trailer lighting equipment. GO to G2.
No
REFER to Lighting and Horns.

G2 CHECK THE COMPASS FOR CORRECT OPERATION

- NOTE: The auto-dimming interior mirror uses the LIN (Local Interconnect Network) for compass messaging along with messaging for the rear video camera operation.
Verify the compass operates correctly.


Does the compass operate correctly?

Yes
GO to G3.
No
REFER to Instrument Panel, Gauges and Warning Indicators to diagnose the compass.

G3 CHECK FOR CORRECT AUTO-DIMMING INTERIOR MIRROR DISPLAY OPERATION

- Disconnect the auto-dimming interior mirror display connector.

- Check for:
- corrosion

- damaged pins

- pushed-out pins


- Connect the auto-dimming interior mirror display connector and make sure it seats correctly.

- Operate the system and determine if the concern is still present.

Is the concern still present?

Yes
INSTALL a new auto-dimming interior mirror. TEST the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.