Pinpoint Test H: Poor Image Quality
Parking Aid - Video
Pinpoint Tests
Pinpoint Test H: 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. For vehicles with navigation, with the gear selector in 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 left portion of the auto-dimming interior mirror (for vehicles without navigation) or displays an image on the Front Display Interface Module (FDIM) (for vehicles with navigation).
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Video camera
PINPOINT TEST H: POOR IMAGE QUALITY
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to Battery.
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H1 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 GD120 (BK/GN), harness side and ground.
- Is the resistance less than 5 ohms?
Yes
GO to H2.
No
REPAIR the circuit. CONNECT the negative battery cable. TEST the system for normal operation.
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H2 CHECK THE VIDEO CAMERA VIDEO SIGNAL CIRCUITS FOR A SHORT TO GROUND WITH THE AUTO-DIMMING INTERIOR MIRROR (WITHOUT NAVIGATION) OR FDIM (WITH NAVIGATION) DISCONNECTED
- Disconnect: Auto-Dimming Interior Mirror C9039 (Without Navigation) or FDIM C2123 (With Navigation) .
- Measure the resistance between the video camera C4357-4, circuit VME19 (BN), harness side and ground and the video camera C4357-5, circuit RME19 (BN/YE), harness side and ground.
- Are the resistances greater than 10,000 ohms?
Yes
GO to H3.
No
REPAIR the circuit in question. TEST the system for normal operation.
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H3 CHECK THE VIDEO CAMERA VIDEO SIGNAL CIRCUITS FOR A SHORT TO VIDEO SHIELD
- Measure the resistance between the video camera C4357-4, circuit VME19 (BN), harness side and the video camera C4357-2, circuit DME19 (BK/OG), harness side.
- Measure the resistance between the video camera C4357-5, circuit RME19 (BN/YE), harness side and the video camera C4357-2, circuit DME19 (BK/OG), harness side.
- Is the resistance greater than 10,000 ohms?
Yes
GO to H4.
No
REPAIR the circuit in question. TEST the system for normal operation.
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H4 CHECK THE VIDEO SIGNAL CIRCUITS FOR AN OPEN
- Disconnect: Auto-Dimming Interior Mirror (Without Navigation) C9039 .
- Disconnect: FDIM (With Navigation) C2384 .
- Connect a fused jumper wire between the video camera C4357-4, circuit VME19 (BN), harness side and the video camera C4357-5, circuit RME19 (BN/YE), harness side.
- For vehicles without navigation, measure the resistance between the auto-dimming interior mirror C9039-8, circuit VME19 (BN), harness side and the auto-dimming interior mirror C9039-16, circuit RME19 (BN/YE), harness side.
- For vehicles with navigation, measure the resistance between the FDIM C2123-3, circuit VME19 (BN), harness side and the FDIM C2123-9, circuit RME19 (BN/YE), 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. Parking Aid - Video
No
REMOVE the jumper wire. GO to H5.
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H5 CHECK VIDEO SIGNAL CIRCUIT VME19 (BN) FOR AN OPEN
- For vehicles without navigation, measure the resistance between the auto-dimming interior mirror C9039-8, circuit VME19 (BN), harness side and the video camera C4357-4, circuit VME19 (BN), harness side.
- For vehicles with navigation, measure the resistance between the FDIM C2123-3, circuit VME19 (BN), harness side and the video camera C4357-4, circuit VME19 (BN), harness side.
- Is the resistance less than 5 ohms?
Yes
REPAIR circuit RME19 (BN/YE). TEST the system for normal operation.
No
REPAIR circuit VME19 (BN). TEST the system for normal operation.
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