Pinpoint Test A: The Rear Video Is Inoperative
Parking Aid - Video
Pinpoint Tests
Pinpoint Test A: The Rear Video Is Inoperative
Refer to Wiring Diagram Set 131, Parking Aid for schematic and connector information. Diagrams By Number
Normal Operation
For vehicles without navigation, with the gear selector in the 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 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:
- Fuse
- Wiring, terminals or connectors
- Video camera
- Auto-dimming interior mirror (without navigation)
- FDIM (with navigation)
PINPOINT TEST A: THE REAR VIDEO IS INOPERATIVE
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to Battery.
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A1 VERIFY VEHICLE EQUIPMENT - NAVIGATION
- Check the vehicle for navigation.
- Is the vehicle equipped with navigation?
Yes
GO to A8.
No
GO to A2.
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A2 CHECK THE REVERSING LAMPS OPERATION
- Check the operation of the reversing lamps.
- Do the reversing lamps operate correctly?
Yes
GO to A3.
No
REFER to Lighting and Horns.
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A3 CHECK FOR VIDEO CAMERA SIGNAL
- Ignition OFF.
- Apply the parking brake.
- Ignition ON.
- Select REVERSE.
- Observe the auto-dimming interior mirror.
- Does the auto-dimming interior mirror momentarily display a blue screen then a black screen?
Yes
GO to A11.
No
GO to A4.
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A4 CHECK THE AUTO-DIMMING INTERIOR MIRROR VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: Auto-Dimming Interior Mirror C9039.
- Ignition ON.
- Measure the voltage between the auto-dimming interior mirror C9039-1, circuit CBP41 (BU), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
GO to A5.
No
VERIFY the Smart Junction Box (SJB) fuse 41 (15A) is OK. If OK, REPAIR the circuit. If not OK, Refer to the Wiring Diagrams to identify the possible causes of the circuit short Diagrams By Number. TEST the system for normal operation.
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A5 CHECK THE AUTO-DIMMING INTERIOR MIRROR REVERSE INPUT CIRCUIT
- Apply the parking brake.
- Select REVERSE.
- Measure the voltage between the auto-dimming interior mirror C9039-2, circuit CAT03 (GY/BN), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
GO to A7.
No
GO to A6.
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A6 CHECK THE AUTO-DIMMING INTERIOR MIRROR REVERSE INPUT CIRCUIT FOR AN OPEN
- Disconnect: Body Control Module B (BCM-B) C4368a.
- Measure the resistance between the BCM-B C4368a-6, circuit CAT03 (GY/BN), harness side and the auto-dimming interior mirror C9039-2, circuit CAT03 (GY/BN), harness side.
- Is the resistance less than 5 ohms?
Yes
INSTALL a new BCM-B. REFER to Body Control Systems. TEST the system for normal operation.
No
REPAIR the circuit. TEST the system for normal operation.
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A7 CHECK THE AUTO-DIMMING INTERIOR MIRROR GROUND CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: Negative Battery Cable.
- Measure the resistance between the auto-dimming interior mirror C9039-3, circuit GD139 (BK/YE), harness side and ground.
- Is the resistance less than 5 ohms?
Yes
INSTALL a new auto-dimming interior mirror. REFER to Mirrors. TEST the system for normal operation.
No
REPAIR the circuit. TEST the system for normal operation.
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A8 VERIFY THE REVERSE SIGNAL INPUT
- Apply the parking brake.
- Ignition ON.
- Select REVERSE.
- Check the IPC message center PRNDL indicator.
- Does REVERSE (R) appear in the message center?
Yes
GO to A9.
No
REFER to Automatic Transmission/Transaxle &/or Transmission Control Systems to diagnose the PRNDL.
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A9 CHECK THE FDIM DISPLAY
- Select REVERSE.
- Observe the FDIM display.
- Does the FDIM display "PLEASE CHECK SURROUNDINGS FOR SAFETY" at the top of the display screen?
Yes
GO to A10.
No
INSTALL a new FDIM. REFER to Accessories and Optional Equipment. TEST the system for normal operation.
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A10 CHECK THE VIDEO CAMERA VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
- Disconnect: Video Camera C4357.
- Ignition ON.
- Measure the voltage between the video camera C4357-1, circuit CBP29 (WH/VT), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
GO to A11.
No
VERIFY that the SJB fuse 29 (5A) is OK. If OK, REPAIR the circuit. If not OK, Refer to the Wiring Diagrams to identify the possible causes of the circuit short Diagrams By Number.
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A11 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 GD116 (BK/VT), harness side and ground.
- Is the resistance less than 5 ohms?
Yes
GO to A12.
No
REPAIR the circuit. TEST the system for normal operation.
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A12 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 1,000 ohms?
Yes
GO to A14.
No
GO to A13.
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A13 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 C4357-6, 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. REFER to Mirrors.
For vehicles with navigation, INSTALL a new FDIM. 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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A14 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 (BARE), 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 (BARE), harness side.
- Is the resistance greater than 10,000 ohms?
Yes
GO to A15.
No
REPAIR the circuit in question. TEST the system for normal operation.
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A15 CHECK THE VIDEO CAMERA VIDEO SIGNAL CIRCUITS FOR A SHORT TO VOLTAGE
- Connect: Negative Battery Cable.
- Ignition ON.
- Measure the voltage between the video camera C4357-6, circuit VMP19 (WH/GN), harness side and ground.
- Measure the voltage between the video camera C4357-7, circuit RMP19 (BN/VT), harness side and ground.
- Is any voltage present?
Yes
REPAIR the circuit in question. TEST the system for normal operation.
No
GO to A16.
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A16 CHECK VIDEO SIGNAL CIRCUITS FOR AN OPEN
- Ignition OFF.
- Disconnect: Auto-Dimming Interior Mirror C9039.
- 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 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. Component Tests and General Diagnostics
No
REMOVE the jumper wire. GO to A17.
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A17 CHECK VIDEO SIGNAL CIRCUIT (+) FOR AN OPEN
- For vehicles without navigation, measure the resistance between the auto-dimming interior mirror C9039-8, circuit VMP19 (WH/GN), harness side and the video camera C4357-6, circuit VMP19 (WH/GN), harness side.
- For vehicles with navigation, 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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