Rear Vision Camera System Malfunction

Rear Vision Camera System Malfunction

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 V signal is sent to the rearview camera indicating that camera operation is requested. Ignition voltage and ground are supplied to the rearview camera. The rearview camera sends video information to the radio 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. An open in the shield of the video signal circuit can also cause a distorted screen.

Reference Information

Schematic Reference

Object Detection Schematics [1][2]Collision Avoidance and Parking Assist Systems

Connector End View Reference

Component Connector End Views Fuel Pump and Level Sensor Assembly

Description and Operation

Object Detection Description and Operation Description and Operation

Electrical Information Reference

* Circuit Testing Circuit Testing

* Connector Repairs Connector Repairs

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Control Module References for scan tool information

Circuit/System Verification

1. Ignition ON.

2. Verify that DTC B2545 is not set.

• If the DTC is set
Refer to DTC B2545 B2545.

• If the DTC is not set

3. Verify the rearview camera there is no debris on the lens and 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.

• If no debris on the lens

4. Ignition ON, transmission in REVERSE.

5. Verify the backup lamps are On.

• If the backup lamps are not ON
Refer to Backup Lamps Malfunction (Automatic Transmission) Backup Lamps Malfunction (Automatic Transmission)Backup Lamps Malfunction (Manual Transmission) Backup Lamps Malfunction (Manual Transmission).

• If the backup lamps are ON

6. Engine running, transmission in REVERSE.

7. Verify a clear rear vision image is displayed on the radio.

• If a clear image is not displayed
Refer to Circuit/System Testing.

• If a clear image is displayed

8. All OK.

Circuit/System Testing

Note: Circuit/System Verification must be performed before Circuit/System Testing.

1. Ignition OFF, disconnect the harness connector at the B87 Rearview Camera.

2. Test for less than 10 ohms between the ground circuit terminal 5 and ground.

• If 10 ohms or greater
Test for less than 2 ohms in the ground circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.

• If less than 2 ohms, repair the open/high resistance in the ground connection.

• If less than 10 ohms

3. Ignition ON.

4. Verify a test lamp illuminates between the ignition circuit terminal 6 and ground.

• If the test lamp does not illuminate

1. Ignition OFF.

2. Test for less than 2 ohms in the ignition circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.

• If less than 2 ohms, verify the fuse is OK and there is voltage at the fuse.

3. If the circuit tests normal, test or replace the KR74 Ignition Run Relay.

• If the test lamp illuminates

5. Engine running, park brake applied, transmission in REVERSE.

6. Test for greater than 11 V between the control circuit terminal 3 and ground.

• If less than 11 V

1. Ignition OFF, disconnect the X7 harness connector at the K9 Body Control Module.

2. Test for infinite resistance between the control circuit and ground.

• If less than infinite resistance, repair the short to ground on the circuit.

• If infinite resistance

3. Test for less than 2 ohms in the control circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.

• If less than 2 ohms, replace the K9 Body Control Module.

• If greater than 11 V

7. Ignition OFF, disconnect the X4 harness connector at the A11 Radio, ignition ON.

8. Test for less than 1 V between the signal circuit terminal listed below and ground:

* Signal (+) circuit terminal 1 at the B87 Rearview Camera.

* Signal (-) circuit terminal 4 at the B87 Rearview Camera.

• If 1 V or greater
Repair the short to voltage on the circuit.

• If less than 1 V

9. Test for infinite resistance between the signal circuit terminal listed below and ground:

* Signal (+) circuit terminal 1 at the B87 Rearview Camera.

* Signal (-) circuit terminal 4 at the B87 Rearview Camera.

• If less than infinite resistance
Repair the short to ground on the circuit.

• If infinite resistance

10. Test for less than 2 ohms in the signal (+) circuit end to end.

• If 2 ohms or greater
Repair the open/high resistance in the circuit.

• If less than 2 ohms

11. Test for less than 2 ohms in the signal (-) circuit end to end.

• If 2 ohms or greater
Test the signal circuit for an open/high resistance.

• If less than 2 ohms

12. Replace the B87 Rearview Camera.

13. Engine running, transmission in REVERSE, verify a clear rear vision image is displayed on the A11 Radio.

• If a clear rear vision image is not displayed on the A11 Radio
Replace the A11 Radio.

• If a clear rear vision image displayed on the A11 Radio

14. All Ok.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

* Rearview Camera Image Display Module Replacement Service and Repair

* Control Module References Control Module References for body control module or radio replacement, programming and setup