Pinpoint Test J: Poor Image Quality

Parking Aid - Video

Pinpoint Test J: Poor Image Quality

Refer to Wiring Diagram Set 131, Parking Aid for schematic and connector information. Diagrams By Number

Normal Operation

With the gear selector in the REVERSE (R) position, a reverse signal is sent from the Instrument Panel Cluster (IPC) 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).

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors
- Video camera



PINPOINT TEST J: POOR IMAGE QUALITY

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

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J1 CHECK THE VIDEO CAMERA GROUND CIRCUIT FOR AN OPEN


- Ignition OFF.
- Disconnect: Negative Battery Cable.
- Disconnect: Video Camera C4357.
- Measure the resistance between the video camera C4357-6, circuit GD133 (BK) or (WH) (with luggage switch), harness side and ground.




- Is the resistance less than 5 ohms?

Yes
GO to J2.

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

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J2 CHECK THE VIDEO CAMERA VIDEO SIGNAL CIRCUITS FOR A SHORT TO GROUND


- Measure the resistance between the video camera C4357-4, circuit (CLEAR), harness side and ground and the video camera C4357-5, circuit (BK), harness side and ground.




- Are the resistances greater than 1,000 ohms?

Yes
GO to J4.

No
GO to J3.

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J3 CHECK THE VIDEO CAMERA VIDEO SIGNAL CIRCUITS FOR A SHORT TO GROUND WITH THE FDIM DISCONNECTED


- Disconnect: FDIM C2123.
- Measure the resistance between the video camera C4357-4, circuit (CLEAR), harness side and ground and the video camera C4357-5, circuit (BK), harness side and ground.




- Are the resistances greater than 10,000 ohms?

Yes
INSTALL a new ACM. REFER to Accessories and Optional Equipment. TEST the system for normal operation.

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

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J4 CHECK THE VIDEO CAMERA VIDEO SIGNAL CIRCUITS FOR A SHORT TO VIDEO SHIELD


- Measure the resistance between the video camera C4357-4, circuit (CLEAR), harness side and video camera C4357-2, circuit (OG), harness side.




- Measure the resistance between the video camera C4357-5, circuit (BK), harness side and video camera C4357-2, circuit (OG), harness side.




- Are the resistances greater than 10,000 ohms?

Yes
GO to J5.

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

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J5 CHECK VIDEO SIGNAL CIRCUITS FOR AN OPEN


- Ignition OFF.
- Disconnect: FDIM C2123.
- Connect a fused jumper wire between the video camera C4357-4, circuit (CLEAR), harness side and the video camera C4357-5, circuit (BK), harness side.




- Measure the resistance between the FDIM C2123-3, circuit VMP19 (WH/GN), harness side and the FDIM C2123-9, 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 Service and Repair. TEST the system for normal operation.

No
REMOVE the jumper wire. GO to J6.

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J6 CHECK THE VIDEO SIGNAL CIRCUIT VMP19 (WH/GN) FOR AN OPEN


- Measure the resistance between the FDIM C2123-3, circuit VMP19 (WH/GN), harness side and the video camera C4357-4, circuit (CLEAR), harness side.




- Is the resistance less than 5 ohms?

Yes
REPAIR the circuit (BK). TEST the system for normal operation.

No
REPAIR the circuit (CLEAR). TEST the system for normal operation.

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