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Rear Vision Camera System Malfunction



Rear Vision Camera System Malfunction

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* Review Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions provides an overview of each diagnostic category.

Diagnostic Fault Information






Circuit/System Description

The rear view camera image display module receives a 12-volt signal from the body control module (BCM) indicating that the vehicle is in reverse gear. When this signal is detected the rear view camera image display module will provide a regulated 5-volt power source to the rear view camera. The rear view image will then be displayed on the radio.

If a proper video signal is not detected, the radio will display a SERVICE REQUIRED notification on the radio display.

Diagnostic Aids

A poor video image can be caused by ice, snow, and mud buildup on the lens of the rear view camera. Also, extreme lighting conditions can affect performance, such as operating in the dark or with bright sunlight shining on the camera. Extreme high or low temperatures can also affect the image quality. For normal operating characteristics of the rear vision camera system, refer to the Navigation System section of the owners manual.

Circuit/System Verification

1. Inspect the rearview camera for any debris on the lens or a damage bezel or bezel seal.

• Clean any debris from the lens. If the lens, bezel, or bezel seal are damaged, replace as necessary

2. Ignition ON, vehicle in PARK, verify the backup lamps are off.

• If the backup lamps are illuminated, refer to Rear Vision System Always On.

3. Command the backup lamps ON with a scan tool, a clear rear view image should be displayed on the radio

• If a clear image is not displayed, refer to Rear Vision System Does Not Display.
• If the Service Rear Vision Camera System message is displayed, refer to Service Rear Vision Camera System is Displayed.

Circuit/System Testing

Rear Vision System Always On

1. Ignition OFF, disconnect the harness connector at the rear view camera image display module.
2. Ignition ON, vehicle in PARK, verify a test lamp does not illuminate between the control circuit terminal 1 and ground.

• If the test lamp illuminates, test the control circuit for a short to voltage. If the circuit test normal, refer to Backup Lamps Malfunction. Backup Lamps Malfunction

3. If all circuits test normal, replace the rear view camera image display module.

Service Rear Vision Camera System is Displayed

1. Ignition OFF, disconnect the harness connector at the rear view camera image display module.
2. Ignition ON, vehicle in PARK, verify that a test lamp illuminates between the ignition circuit terminal 2 and ground

• If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.

3. Verify that a test lamp illuminates between the ignition circuit terminal 2 and the ground circuit terminal 3.

• If the test lamp does not illuminate, test the ground circuit for an open/high resistance.

4. Park brake applied, transmission in REVERSE, verify that a test lamp illuminates between the control circuit terminal 1 and ground.

• If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.

5. Ignition OFF, connect the harness connector at the rear view camera image display module and disconnect the harness connector at the rearview camera.
6. Test for less than 1.0 ohm between the ground circuit terminal B and ground.

• If greater than the specified range, test the ground circuit for an open/high resistance. If the circuit tests normal, replace the rear view camera image display module.

7. Ignition ON, command the backup lamps with a scan tool.
8. Test for 4.8-5.2 volts between the 5-volt reference circuit terminal A and ground.

• If less than the specified range, test the reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the rear view camera image display module.

• If greater than the specified range, test the reference circuit for a short to voltage. If the circuit tests normal, replace the rear view camera image display module.

9. Ignition OFF, test for greater than 1.0 ohm between the camera video signal circuit terminal C and ground.

• If less than the specified range, test the signal circuit for a short to ground. If the circuit tests normal, replace the rear view camera image display module.

10. Ignition ON, verify that a test lamp does not illuminate between the camera video signal circuit terminal C and ground.

• If the test lamp illuminates, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rear view camera image display module.

11. Ignition OFF, disconnect the rearview camera module.
12. Test for less than 1.0 ohm of resistance along the signal circuit terminal C to terminal 9.

• If greater than the specified range, test the signal circuit for an open/high resistance.

13. If all circuits test normal, test or replace the rear view camera.

Rear Vision System Does Not Display

1. Ignition OFF, disconnect the harness connector at the rear view camera image display module.
2. Ignition OFF, test for greater than 1.0 ohm of resistance between the camera video signal circuit terminal 11 and ground.

• If less than the specified range, test the signal circuit for a short to ground. If the circuit tests normal, replace the radio.

3. Ignition ON, verify that a test lamp does not illuminate between the camera video signal circuit terminal 11 and ground.

• If the test lamp illuminates, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.

4. Ignition OFF, test for greater than 1.0 ohm of resistance between the camera video signal circuit terminal 12 and ground.

• If less than the specified range, test the signal circuit for a short to ground. If the circuit tests normal, replace the radio.

5. Ignition ON, verify that a test lamp does not illuminate between the camera video signal circuit terminal 12 and ground.

• If the test lamp illuminates, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.

6. Ignition OFF, disconnect the harness connector X4 at the radio.
7. Test for less than 1.0 ohm of resistance along the signal circuit terminal 11 to terminal 7.

• If greater than the specified range, test the signal circuit for an open/high resistance.

8. Test for less than 1.0 ohm of resistance along the signal circuit terminal 12 to terminal 6.

• If greater than the specified range, test the signal circuit for an open/high resistance.

9. If all circuits test normal, replace the rear view camera module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests

* Rearview Camera Image Display Module Replacement
* Rearview Camera Replacement (Liftgate) Rearview Camera Replacement (Endgate)
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