Pinpoint Test K: Poor Image Quality

Parking Aid - Video

Pinpoint Test K: Poor Image Quality

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 supplying power to the display in the mirror. 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.

For vehicles with navigation, with the gear selector in the REVERSE (R) position, a reverse signal is sent from the IPC (Instrument Panel Cluster) to the Audio Control Module (ACM) over the Medium Speed Controller Area Network (MS-CAN) , enabling the system. The video signal from the video camera displays an image on the Front Display Interface Module (FDIM).

Poor image quality may be due to a loose ground or shield circuit in the camera wiring.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- Video camera

PINPOINT TEST K : POOR IMAGE QUALITY

NOTE: Failure to disconnect the battery when instructed will result in false resistance readings.

K1 CHECK THE VIDEO CAMERA GROUND CIRCUIT FOR AN OPEN

- Ignition OFF.

- Disconnect: Negative Battery Cable.

- Measure the resistance between the video camera C4357-3, circuit GD171 (BK/GY), harness side and ground.





Is the resistance less than 5 ohms?

Yes
GO to K2.

No
REPAIR the circuit. TEST the system for normal operation.

K2 CHECK THE VIDEO CAMERA VIDEO SIGNAL CIRCUITS FOR A SHORT TO GROUND

- Measure the resistance between the video camera C4357-6, circuit VMP19 (WH/GN), harness side and ground and the video camera C4357-7, circuit RMP19 (BN/VT), harness side and ground.





Are the resistances greater than 10,000 ohms?

Yes
GO to K4.

No
GO to K3.

K3 CHECK THE AUTO-DIMMING INTERIOR MIRROR (WITHOUT NAVIGATION) OR FDIM (Front Display Interface Module) (WITH NAVIGATION) FOR AN INTERNAL SHORT

- Disconnect: Auto-Dimming Interior Mirror C9039 (Without Navigation) or FDIM (Front Display Interface Module) C2410 (With Navigation).

- Measure the resistance between the video camera C4357-6, circuit VMP19 (WH/GN), harness side and ground and the video camera C4357-7, circuit RMP19 (BN/VT), harness side and ground.





Are the resistances greater than 10,000 ohms?

Yes
For vehicles without navigation, INSTALL a new auto-dimming interior mirror.

For vehicles with navigation, INSTALL a new FDIM (Front Display Interface Module). TEST the system for normal operation.

No
REPAIR the circuit in question. TEST the system for normal operation.

K4 CHECK THE VIDEO CAMERA VIDEO SIGNAL CIRCUITS FOR A SHORT TO VIDEO SHIELD

- Measure the resistance between the video camera C4357-6, circuit VMP19 (WH/GN), harness side and the video camera C4357-4, circuit DMP19 (BK), harness side.





- Measure the resistance between the video camera C4357-7, circuit RMP19 (BN/VT), harness side and the video camera C4357-4, circuit DMP19 (BK), harness side.





Are the resistances greater than 10,000 ohms?

Yes
GO to K5.

No
REPAIR the circuit in question. TEST the system for normal operation.

K5 CHECK VIDEO SIGNAL CIRCUITS FOR AN OPEN

- Ignition OFF.

- Disconnect: Auto-Dimming Interior Mirror (Without Navigation) C9039.

- Disconnect: FDIM (Front Display Interface Module) C2410 (With Navigation).

- Connect a fused jumper wire between the video camera C4357-6, circuit VMP19 (WH/GN), harness side and the video camera C4357-7, circuit RMP19 (BN/VT), harness side.





- For vehicles without navigation, measure the resistance between the auto-dimming interior mirror C9039-8, circuit VMP19 (WH/GN), harness side and the auto-dimming interior mirror C9039-16, circuit RMP19 (BN/VT), harness side.





- For vehicles with navigation, measure the resistance between the FDIM (Front Display Interface Module) C2410-3, circuit VMP19 (WH/GN), harness side and the FDIM (Front Display Interface Module) C2410-9, circuit RMP19 (BN/VT), harness side.





Are the resistances less than 5 ohms?

Yes
REMOVE the jumper wire. CARRY OUT the video camera component test. If the camera is inoperative, INSTALL a new video camera. REFER to Video Camera Component Tests and General Diagnostics. TEST the system for normal operation.

No
REMOVE the jumper wire. GO to K6.

K6 CHECK VIDEO SIGNAL CIRCUIT (+) FOR AN OPEN

- Measure the resistance between the auto-dimming interior mirror (without navigation) or the FDIM (Front Display Interface Module) (with navigation), harness side and the video camera, harness side.

Vehicle Positive Meter Lead Negative Meter Lead Circuit Fusion (without navigation) C9039-8 C4357-6 VMP19 (WH/GN) Fusion (with navigation) C2410-3 C4357-6 VMP19 (WH/GN) MKZ C2410-3 C4357-6 VMP19 (WH/GN)






Is the resistance less than 5 ohms?

Yes
REPAIR circuit RMP19 (BN/VT). TEST the system for normal operation.

No
REPAIR circuit VMP19 (WH/GN). TEST the system for normal operation.