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.
Diagnostic Fault Information
Circuit/System Description
When the transmission is placed into REVERSE, a 12 V signal is sent to the B87 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 K74 Human Interface Control Module 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 (with Active Safety System - UGN) Object Detection Description and Operation (with Active Safety System - UGN)Object Detection Description and Operation (with rear vision camera - UVC) Object Detection Description and Operation (with rear vision camera - UVC)Object Detection Description and Operation (with front and rear park assist - UD5) Object Detection Description and Operation (With Front and Rear Park Assist - UD5)Object Detection Description and Operation (with rear park assist - UD7) Object Detection Description and Operation (With Rear Park Assist - UD7)Object Detection Description and Operation (with side blind zone alert - UFT) Object Detection Description and Operation (with side blind zone alert - UFT)Object Detection Description and Operation (with rear cross traffic alert - UFG) Object Detection Description and Operation (With Rear Cross Traffic Alert - UFG)Object Detection Description and Operation (with lane departure warning - UFL) Object Detection Description and Operation (With Lane Departure Warning - UFL)Object Detection Description and Operation (with forward collision alert - UEU) Object Detection Description and Operation (With Forward Collision Alert - UEU)Object Detection Description and Operation (with Haptic Signal Motor Seat) Object Detection Description and Operation (with Haptic Signal Motor Seat)
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 has no debris on the lens and that the bezel and bezel seal are not damaged.
• If debris is 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 R.
5. Verify the backup lamps are illuminated.
• If the backup lamps are not illuminated
Refer to Backup Lamps Malfunction Backup Lamps Malfunction.
• If the backup lamps are illuminated
6. Engine running, transmission in R.
7. Verify a clear rear vision image is displayed on the P17 Info Display Module.
• 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.
* Under normal operating conditions the Human Interface Machine Control Module will become very hot. The module should be allowed to cool down prior to removal for any service procedure.
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
1. Ignition OFF.
2. 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. Refer to Power Mode Mismatch Power Mode Mismatch.
• 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, replace the B87 Rearview Camera.
• If the test lamp illuminates
5. Engine running, park brake applied, transmission in R.
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 X2 harness connector at the K74 Human Interface Control Module, 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 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 R, verify a clear rear vision image is displayed on the P17 Info Display Module.
• If a clear rear vision image is not displayed
Replace the K74 Human Interface Control Module.
• If a clear rear vision image is displayed
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, rearview camera module, or human interface control module replacement, programming and setup