Rear Vision Camera System Malfunction (H3)

Rear Vision Camera System Malfunction (H3)

Diagnostic Instructions

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

Circuit/System Description

When the transmission is placed into REVERSE, a 12 volt signal is sent to the rearview camera image display module indicating that camera operation is requested. The rearview camera image display module then supplies ignition voltage and ground to the rearview camera. The rearview camera sends video information through the rearview camera image display module to the inside rearview mirror through a video signal + and a video signal - circuit. A grounded shielding also wraps the video signal circuits to reduce electronic interference which may degrade the video signal and cause a distorted or otherwise degraded image.

Diagnostic Aids

A poor video image can be caused by ice, snow, and mud buildup on the lens of the rearview 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 rearview camera system, refer to the Navigation System.

Reference Information
Schematic Reference

Object Detection Schematics ([1][2]Collision Avoidance and Parking Assist Systems)
Connector End View Reference

Component Connector End Views (Connector End Views By Name)
Description and Operation

Object Detection Description and Operation (UVF) (Object Detection Description and Operation (UVF))Object Detection Description and Operation (UVC) (Object Detection Description and Operation (UVC))
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Circuit/System Verification

1. Inspect the rearview camera and verify there are no debris on the lens or that the bezel or bezel seal is not damaged.

• If debris are found on the lens, clean the lens. If the lens, bezel, or bezel seal are damaged, replace as necessary.

2. Engine running, vehicle in PARK, verify the backup lamps are off.

• If the backup lamps are illuminated, refer to Rearview Camera System Always On.

3. Vehicle in REVERSE, verify a clear rear vision image is displayed on the inside rearview mirror.

• If a clear image is not displayed, refer to Rearview Camera System Does Not Display.

Circuit/System Testing

Rearview Camera System Always On
1. Ignition OFF, disconnect the harness connector at the rear view camera image display module.
2. Engine running, 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 tests normal, refer to Backup Lamps Malfunction (Backup Lamps Malfunction).

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

Rearview Camera System Does Not Display
1. Ignition OFF, disconnect the harness connector at the rearview camera image display module.
2. Test for less than 1.0 ohm between the ground circuit terminal 3 and ground.

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

3. Engine running, 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.

4. Park brake applied, transmission in REVERSE, test for B+ between the B+ circuit terminal 1 and ground.

• If less than the specified value, test the B+ 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 rearview camera image display module. 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 rearview camera image display module.

7. Engine running, park brake applied, vehicle in REVERSE, test for 5.8-6.2 volts between the 6-volt reference circuit terminal A and ground.

• If less than the specified range, test the 6-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the rearview camera image display module.
• If greater than the specified range, test the 6-volt reference circuit for a short to voltage. If the circuit tests normal, replace the rearview camera image display module.

8. Ignition OFF, disconnect the harness connector at the rearview camera image display module.
9. Test for less then 1 ohm between the shield ground circuit terminal 10 at the rearview camera display module harness connector and terminal D at the rearview camera harness connector.

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

10. Ignition ON, test for less than 1 volt between the signal circuit terminal 9 and ground.

• If greater than the specified range, test the signal circuit for a short to voltage.

11. Test for infinite resistance between the signal circuit terminal 9 and ground.

• If less than the specified value, test the signal circuit for a short to ground.

12. Test for less then 1 ohm between the signal circuit terminal 9 at the rearview camera display module harness connector and terminal C at the rearview camera harness connector.

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

13. Ignition OFF, disconnect the harness connector at the inside rearview mirror.
14. Ignition ON, test for less than 1 volt between the following signal circuits at the inside rearview mirror harness connector and ground:

* Video + signal circuit terminal 1
* Video - signal circuit terminal 2

• If greater than the specified range, test the signal circuit for a short to voltage.

15. Test for infinite resistance between the following signal circuits at the inside rearview mirror harness connector and ground:

* Video + signal circuit terminal 1
* Video - signal circuit terminal 2

• If greater than the specified value, test the signal circuit for a short to ground.

16. Test for less then 1 ohm between the following signal circuits:

* Signal circuit terminal 12 at the rearview camera image module and terminal 1 at the inside rearview mirror.
* Signal circuit terminal 11 at the rearview camera image module and terminal 2 at the inside rearview mirror.

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

17. If all circuits test normal, test or replace the rearview camera.
18. Engine running, park brake applied, vehicle in REVERSE, verify a clear rear vision image is displayed on the radio.

• If a clear rear vision image is not displayed, test or replace the inside rearview mirror.

Repair Instructions

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

* Rearview Camera Replacement (Rearview Camera Replacement)
* Control Module References (Programming and Relearning) for rearview camera image display module or inside rearview mirror replacement, setup, and programming