Diagnosis And Testing - Rear Camera

The hardwired circuits of the Rear View Camera (RVC) and those between the RVC and the radio may be diagnosed using conventional diagnostic tools and procedures. Refer to the appropriate wiring information. The wiring information includes wiring diagrams, details of wire harness routing and retention, connector pin-out information and location views for the various wire harness connectors, splices and grounds. For proper wire repair, Refer to: WIRE SPLICING and connector repair procedures, Refer to REMOVAL and INSTALLATION .

However, conventional diagnostic methods will not prove conclusive in the diagnosis of the RVC or the radio. The most reliable, efficient and accurate means to diagnose the electronic controls and communication related to radio operation, as well as the retrieval or erasure of a Diagnostic Trouble Code (DTC) requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information.

WARNING:

To avoid serious or fatal injury on vehicles equipped with airbags, disable the Supplemental Restraint System (SRS) before attempting any steering wheel, steering column, airbags, airbag curtains, knee blocker, seat belt tensioner, impact sensor or instrument panel component diagnosis or service. Disconnect the Intelligent Battery Sensor (IBS) / negative battery cable assembly from the negative battery post, then wait two minutes for the system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the SRS. Failure to take the proper precautions could result in accidental airbag deployment.

NOTE:

Be certain to confirm the following prior to attempting any additional diagnosis or testing of the RVC. Use a diagnostic scan tool to confirm the rear view camera is setup in the vehicle configuration.

NOTE:

Be certain the radio has been configured with the latest software. Many radio issues can be resolved by updating the radio to the latest software.

NOTE:

For additional information on diagnosing issues with the RVC, review "DIAGNOSIS AND TESTING REAR CAMERA INOPERATIVE WITH RADIO DISPLAY" test. Refer to: DIAGNOSIS AND TESTING REAR CAMERA INOPERATIVE WITH RADIO DISPLAY .

NOTE:

Prior to starting rear view camera diagnostics, the following step must be performed: With the scan tool, perform the Reset ECU function for the Radio under the Guided Diagnostics menu in the scan tool.

NOTE:

When utilizing RG-174 Coax Cable Adapter 9977-6-8 OR a known good camera, the following step must be adhered to prior to checking camera functionality: With the scan tool, perform the Reset ECU function for the Radio under the Guided Diagnostics menu in the scan tool.

REAR VIEW CAMERA DIAGNOSIS
CONDITION	POSSIBLE CAUSES	CORRECTION
VIDEO IMAGE IS BLURRY OR OBSTRUCTIVE	1. Dirt, smear, fingerprints on RVC lens.	1. Inspect lens for foreign material, and clean lens as required, using the lens cleaning procedure.
	2. Ineffective camera shield circuit in the Low Voltage Differential Signal (LVDS) coaxial cable connection at the Radio or RVC	7. Inspect the LVDS coaxial cable for damage to the terminals. Check RVC coaxial connection using . Replace as necessary. For additional diagnosis of the RVC, refer to the "Diagnosis And Testing Camera Inoperative With Display Screen" test. Refer to: DIAGNOSIS AND TESTING REAR CAMERA INOPERATIVE WITH RADIO DISPLAY .
	3. Moisture buildup on the inside of the lens	3. Replace the ineffective camera as required.
NO VIDEO DISPLAY IN RADIO AND DOES NOT DISPLAY ANY MESSAGE	1. Incorrect radio software	1. Check to be certain that the radio has the latest software update installed. Install the radio software update, if required.
	2. Ineffective radio inputs or outputs	2. Use a diagnostic scan tool to test the radio inputs and outputs including those received over the Controller Area Network (CAN) data bus. Refer to the appropriate diagnostic information.
	3. Ineffective radio	3. Use a diagnostic scan tool to test the radio. Refer to the appropriate diagnostic information.
	4. Ineffective radio fuse	4. Test and replace the radio fuses, if required.
	5. Ineffective radio ground circuit	5. Check for loose or damaged wiring connections at the radio. Test and repair the open radio ground circuit, if required.
	6. Ineffective radio feed circuit	6. Check for loose or damaged wiring connections at the radio. Test and repair the open radio feed circuit, if required.
	7. Ineffective LVDS coaxial connection at RVC or LVDS cable	7. Check the LVDS coaxial cable center terminal for 10 volts (VP2R radios) or 12 volts (VP4R radios). Check RVC LVDS coaxial connection using . Replace as necessary. For additional diagnosis of the RVC, refer to the "Diagnosis And Testing Camera Inoperative With Display Screen" test. Refer to: DIAGNOSIS AND TESTING REAR CAMERA INOPERATIVE WITH RADIO DISPLAY .
CAMERA IMAGE BUT NO GRIDLINES	1. Setting disabled in Radio	1. Check setting in radio to ensure active guideline is enabled.
	2. Incorrect radio software	2. Check to be certain that the radio has the latest software update installed. Install the radio software update, if required.
	3. Ineffective Radio	3. Use a diagnostic scan tool to test the radio. Refer to the appropriate diagnostic information.
	4. Incorrect Body Control Module (BCM) software	4. Use a diagnostic scan tool to test the BCM inputs and outputs. Refer to the appropriate diagnostic information.
	5. Ineffective camera LVDS circuit	5. Check for loose or damaged wiring connections between the camera and the radio. Refer to the appropriate diagnostic information. Replace the portion of harness that is damaged, if required.
	6. Ineffective camera	6. Replace camera.
NO CAMERA IMAGE IN RADIO VIDEO DISPLAY AND NO BACKUP LAMPS IN REVERSE	1. Backup lamps inoperative.	1. Test and repair the open backup lamp switch output circuit between the right and left tail lamps if required.
	2. Both backup lamps inoperative.	2. Test and repair the open backup lamp switch output circuit between the Body Control Module (BCM) and the tail lamps, if required.
	3. Ineffective BCM inputs or outputs.	3. Use a diagnostic scan tool to test the BCM inputs and outputs. Refer to the appropriate diagnostic information.
NO CAMERA IMAGE IN RADIO VIDEO DISPLAY - DOES DISPLAY CHECK ENTIRE SURROUNDINGS MESSAGE BRIEFLY AFTER SHIFTING INTO REVERSE AND BACKUP LAMPS DO OPERATE	1. Ineffective camera LVDS coaxial circuit or shield circuit	1. Check the LVDS coaxial cable center terminal for 10 volts (VP2R radios) or 12 volts (VP4R radios). Check for loose or damaged wiring connections between the camera and the radio. Refer to the appropriate diagnostic information. Replace the LVDS cable, if required.
	6. Ineffective camera.	6. Replace the ineffective camera, if required.