Chevrolet Trax: Rear vision camera system malfunction

Diagnostic Instructions

• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
• 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

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 (Encore), Object Detection Schematics (Trax)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - TRAX

Description and Operation

Object Detection Description and Operation (Rearvision Camera, UVC), Object Detection Description and Operation (Rear Park Assist, UD7), Object Detection Description and Operation (Side Blind Zone Alert, UFT), Object Detection Description and Operation (Rear Cross Traffic Alert, UFG)

Electrical Information Reference

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Circuit/System Verification

1. Ignition ON.
2. Verify that DTC B2545 is not set.

• If the DTC is set

Refer to DTC B2545 .

• If the DTC is not set

3. Verify there is no debris on the rearview camera lens and that the bezel and bezel seal are 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. Engine running, transmission in REVERSE.
5. Verify the backup lamps are On.

• If the backup lamps are not ON

Refer to Backup Lamps Malfunction (Manual Transmission) , Backup Lamps Malfunction (Automatic 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 and all vehicle systems OFF, disconnect the harness connector at the B87 Rearview Camera. It may take up to 2 min for all vehicle systems to power down.
2. Test for less than 10 ohms between the ground circuit terminal 5 and ground.

If 10 ohms or greater

1. 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 and the circuit fuse is good

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.
• If the test lamp does not illuminate and the circuit fuse is open

1. Ignition OFF.
2. Test for infinite resistance between the ignition circuit and ground.

• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance, refer to Power Mode Mismatch .
• If the test lamp illuminates

5. Engine running, park brake applied, transmission in REVERSE.
6. Verify a test lamp illuminates between the control circuit terminal 3 and ground.

• If the test lamp does not illuminate

1. Ignition OFF, disconnect the X7 harness connector at the K9 Body Control Module and remove both E5 Backup Lamps.
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 the test lamp illuminates

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:

• B87 Rearview Camera signal (+) circuit terminal 1.
• B87 Rearview Camera signal (-) circuit terminal 4.
• 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:

• B87 Rearview Camera signal (+) circuit terminal 1.
• B87 Rearview Camera signal (-) circuit terminal 4.
• 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 following signal (+) circuits end to end.

• B87 Rearview Camera signal (+) circuit terminal 1 to A11 Radio X4, terminal 5
• B87 Rearview Camera signal (-) circuit terminal 4 to A11 Radio X4, terminal 15
• If 2 ohms or greater

Repair the open/high resistance in the appropriate circuit.

• If less than 2 ohms

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

• B87 Rearview Camera signal (+) circuit terminal 1 to A11 Radio X4, terminal 5
• B87 Rearview Camera signal (-) circuit terminal 4 to A11 Radio X4, terminal 15
• If 2 ohms or greater

Test the appropriate signal circuit for an open/high resistance.

• If less than 2 ohms

12. Replace the B87 Rearview Camera.
13. Engine running, transmission in REVERSE.
14. Verify a clear rear vision image is displayed on the driver information display.

• If a clear rear vision image is not displayed

Refer to Radio Information Display Malfunction (Monochrome Display) , Radio Information Display Malfunction (Color Display) .

• If a clear rear vision image displayed

15. All Ok.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Rearview Camera Image Display Module Replacement

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