Pinpoint Test I: Poor Image Quality
Parking Aid - Video
Pinpoint Tests
Pinpoint Test I: Poor Image Quality
Normal Operation
With the ignition switch in the RUN position, the video camera receives voltage. With the gear selector in the REVERSE (R) position, a reverse signal is sent from the Instrument Cluster (IC) 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 I: POOR IMAGE QUALITY
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to Battery, Mounting and Cables Battery Disconnect.
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I1 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 C4357-3, circuit GD149 (BK/GY), harness side and ground.
- Is the resistance less than 5 ohms?
Yes
GO to I2.
No
REPAIR the circuit. TEST the system for normal operation.
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I2 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 C4357-6, circuit VMP19 (WH/GN), harness side and ground; and between the video camera C4357-7, circuit RMP19 (BN/VT), harness side and ground.
- Are the resistances greater than 10,000 ohms?
Yes
GO to I3.
No
REPAIR the circuit in question. TEST the system for normal operation.
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I3 CHECK THE VIDEO SHIELD FOR AN OPEN
- Measure the resistance between the FDIM C2123-2, circuit DMP19 (BK), harness side and the video camera C4357-4, circuit DMP19 (BK), harness side.
- Is the resistance less than 5 ohms?
Yes
GO to I4.
No
REPAIR the circuit in question. TEST the system for normal operation.
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I4 CHECK THE VIDEO CAMERA VIDEO SIGNAL CIRCUITS FOR A SHORT TO VIDEO SHIELD
- Measure the resistance between the video camera C4357-4, circuit DMP19 (BK), harness side and the video camera C4357-6, circuit VMP19 (WH/GN), harness side.
- Measure the resistance between the video camera C4357-4, circuit DMP19 (BK), harness side and the video camera C4357-7, circuit RMP19 (BN/VT), harness side.
- Is the resistance greater than 10,000 ohms?
Yes
GO to I5.
No
REPAIR the circuit in question. TEST the system for normal operation.
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I5 CHECK THE VIDEO SIGNAL CIRCUITS FOR AN OPEN
- Ignition OFF.
- Disconnect: FDIM C2123.
- 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.
- 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 Parking Aid - Video. 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 I6.
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I6 CHECK THE VIDEO SIGNAL (+) CIRCUIT FOR AN OPEN
- Measure the resistance between the FDIM C2123-3, circuit VMP19 (WH/GN), harness side and the video camera C4357-6, circuit VMP19 (WH/GN), harness side.
- 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.
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