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

Parking Aid - Video

Pinpoint Tests

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

Refer to Wiring Diagram Set 131 (Escape/Mariner, Escape Hybrid/Mariner Hybrid) for schematic and connector information. Diagrams By Number

Normal Operation

For vehicles without navigation, with the gear selector in REVERSE (R) position, a reverse voltage signal is sent to the auto-dimming interior mirror and rear video camera supplying power to the system. The video camera signal is sent to the auto-dimming interior mirror. The video signal from the video camera displays an image on the LH side of the auto-dimming interior mirror.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors
- Auto-dimming interior mirror




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

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J1 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 J2.

No
REFER to Lighting and Horns.

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J2 CHECK THE AUTO-DIMMING INTERIOR MIRROR REVERSE INPUT CIRCUIT



- Disconnect: Auto-Dimming Interior Mirror C9039.
- Measure the voltage between the auto-dimming interior mirror C9039-2, circuit CBB07 (GN/BU), harness side and ground.




- Is any voltage present?

Yes
REPAIR the circuit. TEST the system for normal operation.

No
GO to J3.

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J3 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. REFER to Mirrors. 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.

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