Pinpoint Test J: The Rear Video Is Inoperative
Parking Aid - Video
Pinpoint Tests
Pinpoint Test J: The Rear Video Is Inoperative
Normal Operation
With the ignition switch in the RUN position, the video camera receives voltage. For vehicles without navigation, with the gear selector in REVERSE (R) position, a reverse voltage signal is sent to the interior rear view 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 interior rear view mirror (for vehicles without navigation) or in the display of the ACM (for vehicles with navigation).
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Video camera
- Interior rear view mirror (without navigation)
- ACM (with navigation)
PINPOINT TEST J: THE REAR VIDEO IS INOPERATIVE
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to Battery.
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J1 CHECK AND CLEAN THE REAR VIDEO CAMERA LENS
- Clean and make sure that the video camera lens is clear of any debris.
- Test the video camera system and verify the video camera image.
- Is the video camera concern still present?
Yes
GO to J2.
No
The system is operating correctly at this time. The concern was caused by a dirty video camera lens.
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J2 VERIFY VEHICLE EQUIPMENT - NAVIGATION ACM
- Check the vehicle for a navigation ACM.
- Is the vehicle equipped with a navigation ACM?
Yes
GO to J8.
No
GO to J3.
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J3 CHECK THE REVERSING LAMPS OPERATION
- Check the operation of the reversing lamps.
- Do the reversing lamps operate correctly?
Yes
GO to J4.
No
REFER to Lighting and Horns.
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J4 CHECK FOR A VIDEO CAMERA SIGNAL
- Ignition OFF.
- Apply the parking brake.
- Ignition ON.
- Select REVERSE.
- Observe the interior rear view mirror.
- Does the interior rear view mirror momentarily display a blue screen then a black screen?
Yes
The interior rear view mirror is functional. There is no signal from the video camera. GO to J10.
No
GO to J5.
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J5 CHECK THE INTERIOR REAR VIEW MIRROR VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: Interior Rear View Mirror C9112 .
- Ignition ON.
- Measure the voltage between the interior rear view mirror C9112-1, circuit CBP46 (BU), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
GO to J6.
No
VERIFY the Smart Junction Box (SJB) fuse 41 (15A) is OK. If OK, REPAIR the circuit. TEST the system for normal operation.
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J6 CHECK THE INTERIOR REAR VIEW MIRROR REVERSE INPUT CIRCUIT
- Apply the parking brake.
- Select REVERSE.
- Measure the voltage between the interior rear view mirror C9112-2, circuit CLS10 (GN/BN), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
GO to J7.
No
REPAIR the circuit. TEST the system for normal operation.
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J7 CHECK THE INTERIOR REAR VIEW MIRROR GROUND CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: Negative Battery Cable .
- Measure the resistance between the interior rear view mirror C9112-3, circuit GD133 (BK), harness side and ground.
- Is the resistance less than 5 ohms?
Yes
INSTALL a new interior rear view mirror. REFER to Mirrors. TEST the system for normal operation.
No
REPAIR the circuit. TEST the system for normal operation.
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J8 VERIFY THE REVERSE SIGNAL INPUT
- Apply the parking brake.
- Ignition ON.
- Select REVERSE.
- Check the IC message center PRNDL indicator.
- Does REVERSE (R) appear in the message center?
Yes
GO to J9.
No
REFER to Instrument Panel, Gauges and Warning Indicators to diagnose the PRNDL.
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J9 CHECK THE ACM DISPLAY
- Observe the ACM while placing the vehicle in REVERSE (R).
- While selecting REVERSE (R), does the ACM screen switch to video camera mode and display "PLEASE CHECK SURROUNDINGS FOR SAFETY"?
Yes
The ACM display is functional. There is no signal from the video camera.GO to J10.
No
INSTALL a new ACM. REFER to Accessories and Optional Equipment. TEST the system for normal operation.
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J10 CHECK THE VIDEO SIGNAL CIRCUITS INTEGRITY
- Ignition OFF.
- Disconnect: Interior Rear View Mirror C9112 (Without Navigation) or ACM C240b (With Navigation) .
- For vehicles without navigation, measure the resistance between the interior rear view mirror C9112-8, circuit VMP19 (WH/GN), harness side and the interior rear view mirror C9112-16, circuit RMP19 (BN/VT), harness side.
- For vehicles with navigation, measure the resistance between the ACM C240b-1, circuit VMP19 (WH/GN), harness side and the ACM C240b-6, circuit RMP19 (BN/VT), harness side.
- Is the resistance between 74 and 106 ohms?
Yes
GO to J11.
No
GO to J13.
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J11 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 CBB73 (WH/BN), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
GO to J12.
No
VERIFY the Battery Junction Box (BJB) fuse 73 (2A) is OK. If OK, REPAIR the circuit. TEST the system for normal operation.
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J12 CHECK THE VIDEO CAMERA GROUND CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: Negative Battery Cable .
- Measure the resistance between the video camera C4357-6, circuit GD133 (BK/WH), harness side and ground.
- Is the resistance less than 5 ohms?
Yes
GO to J18.
No
REPAIR the circuit in question. TEST the system for normal operation.
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J13 CHECK THE VIDEO CAMERA VIDEO SIGNAL CIRCUITS FOR A SHORT TO GROUND
- Disconnect: Video Camera C4357 .
- Measure the resistance between the video camera C4357-4, circuit VMP19 (WH/GN), harness side and ground and video camera C4357-5, circuit RMP19 (BN/VT), harness side and ground.
- Are the resistances greater than 10,000 ohms?
Yes
GO to J14.
No
REPAIR the circuit in question. TEST the system for normal operation.
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J14 CHECK THE VIDEO CAMERA VIDEO SIGNAL CIRCUITS FOR A SHORT TO VIDEO SHIELD
- Measure the resistance between the video camera C4357-4, circuit VMP19 (WH/GN), harness side and video camera C4357-2, circuit DMP19 (BK), harness side.
- Measure the resistance between the video camera C4357-5, circuit RMP19 (BN/VT), harness side and video camera C4357-2, circuit DMP19 (BK), harness side.
- Are the resistances greater than 10,000 ohms?
Yes
GO to J15.
No
REPAIR the circuit in question. TEST the system for normal operation.
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J15 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 C4357-4, circuit VMP19 (WH/GN), harness side and ground.
- Measure the voltage between the video camera C4357-5, circuit RMP19 (BN/VT), harness side and ground.
- Is any voltage present?
Yes
REPAIR the circuit in question. CONNECT the negative battery cable. TEST the system for normal operation.
No
GO to J16.
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J16 CHECK THE VIDEO CAMERA VIDEO SIGNAL CIRCUITS FOR AN OPEN
- Ignition OFF.
- Connect a fused jumper wire between the video camera C4357-4, circuit VMP19 (WH/GN), harness side and the video camera C4357-5, circuit RMP19 (BN/VT), harness side.
- For vehicles without navigation, measure the resistance between the interior rear view mirror C9112-8, circuit VMP19 (WH/GN), harness side and the interior rear view mirror C9112-16, circuit RMP19 (BN/VT), harness side.
- For vehicles with navigation, measure the resistance between the ACM C240b-1, circuit VMP19 (WH/GN), harness side and the ACM C240b-6, circuit RMP19 (BN/VT), harness side.
- Is the resistance less than 5 ohms?
Yes
REMOVE the jumper wire. GO to J18.
No
REMOVE the jumper wire. GO to J17.
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J17 CHECK THE VIDEO (+) SIGNAL CIRCUIT FOR AN OPEN
- For vehicles without navigation, measure the resistance between the interior rear view mirror C9112-8, circuit VMP19 (WH/GN), harness side and the video camera C4357-4, circuit VMP19 (WH/GN), harness side.
- For vehicles with navigation, measure the resistance between the ACM C240b-1, circuit VMP19 (WH/GN), harness side and the video camera C4357-4, 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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J18 CHECK FOR CORRECT VIDEO CAMERA OPERATION
- Connect all disconnected connectors.
- Disconnect the video camera connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the video camera connector and make sure it seats correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes
INSTALL a new video camera. REFER to Video Camera Service and Repair. TEST the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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