Pinpoint Test H: Poor Image Quality
Parking Aid - Video
Pinpoint Test H: Poor Image Quality
Refer to Wiring Diagram Set 131, Parking Aid for schematic and connector information Electrical Diagrams.
Normal Operation
A pair of shielded wires carries the video signal from the rear video camera to the Accessory Protocol Interface Module (APIM) and displays an image in the Front Display Interface Module (FDIM). The rear video system provides a clear image of objects to the rear of the vehicle.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Video camera
PINPOINT TEST H : POOR IMAGE QUALITY
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 results in false resistance readings.
H1 CHECK AND CLEAN THE REAR VIDEO CAMERA LENS
- Clean and make sure the rear 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 H2.
No
The system is operating correctly at this time. The concern was caused by a dirty video camera lens.
H2 CHECK THE VIDEO SIGNAL CIRCUITS INTEGRITY
- Ignition OFF.
- Disconnect: APIM (Accessory Protocol Interface Module) C2383.
- Measure the resistance between the APIM (Accessory Protocol Interface Module) C2383-14, circuit VMP19 (WH/GN), harness side and the APIM (Accessory Protocol Interface Module) C2383-15, circuit RMP19 (BN/VT), harness side.
Is the resistance between 74 and 106 ohms?
Yes
GO to H9.
No
GO to H3.
H3 CHECK THE VIDEO CAMERA GROUND CIRCUIT FOR AN OPEN
- Disconnect: Negative Battery Cable.
- Disconnect: Video Camera C4357.
- Measure the resistance between the video camera C4357-5, circuit GD143 (BK/VT), harness side and ground.
Is the resistance less than 5 ohms?
Yes
GO to H4.
No
REPAIR the circuit. CONNECT the negative battery cable. TEST the system for normal operation.
H4 CHECK THE VIDEO CAMERA SIGNAL CIRCUITS FOR A SHORT TO GROUND
- Measure the resistance between the video camera C4357-4, circuit VMP19 (WH/GN), harness side and ground; and between the video camera C4357-3, circuit RMP19 (BN/VT), harness side and ground.
Are the resistances greater than 10,000 ohms?
Yes
GO to H5.
No
REPAIR the circuit in question. TEST the system for normal operation.
H5 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 the video camera C4357-6, circuit DMN19 (shield), harness side.
- Measure the resistance between the video camera C4357-3, circuit RMP19 (BN/VT), harness side and the video camera C4357-6, circuit DMN19 (shield), harness side.
Are the resistances greater than 10,000 ohms?
Yes
GO to H6.
No
REPAIR the circuit in question. TEST the system for normal operation.
H6 CHECK VIDEO SIGNAL CIRCUITS FOR AN OPEN
- Connect a fused jumper wire between the video camera C4357-4, circuit VMP19 (WH/GN), harness side and the video camera C4357-3, circuit RMP19 (BN/VT), harness side.
- Measure the resistance between the APIM (Accessory Protocol Interface Module) C2383-14, circuit VMP19 (WH/GN), harness side and the APIM (Accessory Protocol Interface Module) C2383-15, circuit RMP19 (BN/VT), harness side.
Is the resistance less than 5 ohms?
Yes
REMOVE the jumper wire. GO to H8.
No
REMOVE the jumper wire. GO to H7.
H7 CHECK VIDEO (-) SIGNAL CIRCUIT FOR AN OPEN
- Measure the resistance between the video camera C4357-3, circuit RMP19 (BN/VT), harness side and the APIM (Accessory Protocol Interface Module) C2383-15, circuit RMP19 (BN/VT), harness side.
Is the resistance less than 5 ohms?
Yes
REPAIR circuit VMP19 (WH/GN). TEST the system for normal operation.
No
REPAIR circuit RMP19 (BN/VT). TEST the system for normal operation.
H8 CHECK VIDEO SHIELD CIRCUIT FOR AN OPEN
- Measure the resistance between and the video camera C4357-6, circuit DMN 19 (shield), harness side and the APIM (Accessory Protocol Interface Module) C2383-33, circuit DMN19 (shield), harness side.
Is the resistance less than 5 ohms?
Yes
GO to H9.
No
REPAIR the circuit. TEST the system for normal operation.
H9 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 . 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.