Rear Vision Camera System Malfunction

/ 9-5 (9650) / 2011 / 3. Electrical System / Traffic safety system / Fault diagnosis, fault symptoms / 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.

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

Connector End View Reference

Component Connector End Views

Description and Operation

Object Detection Description and Operation (Traffic Sign Assist) Object Detection Description and Operation (Parking Assist with Parallel Parking) Object Detection Description and Operation (Parking Assist) Object Detection Description and Operation (Lane Departure Warning) Object Detection Description and Operation (UFT) Object Detection Description and Operation (UVC)

Electrical Information Reference

•	Circuit Testing

•	Connector Repairs

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1.	Verify that DTC B2545 is not present.

2.	If DTC is set, refer to DTC B2545 .

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

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

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

6.	If the backup lamps are illuminated, refer to Backup Lamps Malfunction .

7.	Vehicle in REVERSE, verify the backup lamps are on.

8.	If the backup lamps are not illuminated, refer to Backup Lamps Malfunction .

9.	Engine running, transmission in REVERSE, verify a clear rear vision image is displayed on the radio.

10.	If a clear image is not displayed, refer to Circuit/System Testing.

Circuit/System Testing

Note

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

1.	Ignition OFF, disconnect the harness connector at the rearview camera.

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

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

4.	Ignition ON, verify a test lamp illuminates between the ignition circuit terminal 6 and ground.

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

6.	Engine running, park brake applied, transmission in REVERSE, test for greater than 11 V between the control circuit terminal 3 and ground.

7.	If less than the specified value, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 Body Control Module.

8.	Ignition OFF, disconnect the X4 harness connector at the A11 Radio.

9.	Ignition ON, test for less than 0.3 V between the following signal circuit terminals at the rearview camera harness connector and ground:

•

Signal (+) circuit terminal 1

•

Signal (-) circuit terminal 4

10.	If greater than the specified value, test the signal circuit for a short to voltage.

11.	Test for infinite resistance between the following circuit terminals at the rearview camera harness connector and ground:

•

Signal (+) circuit terminal 1

•

Signal (-) circuit terminal 4

12.	If not the specified value, test the circuit for a short to ground.

13.	Test for less than 5 Ω between the signal (+) circuit terminal 1 at the rearview camera harness connector and the signal (+) circuit terminal 5 X4 at the A11 Radio harness connector.

14.	If greater then the specified value, test the signal circuit for an open circuit/high resistance.

15.	Test for less than 5 Ω between the signal (-) circuit terminal 4 at the rearview camera harness connector and the signal (-) circuit terminal 15 X4 at the A11 Radio harness connector.

16.	If greater then the specified value, test the signal circuit for an open circuit/high resistance.

17.	If all circuits test normal, replace the rearview camera.

18.	Engine running, transmission in REVERSE, verify a clear rear vision image is displayed on the radio.

19.	If a clear rear vision image is not displayed, replace the A11 Radio.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

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

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