Rear Vision Camera System Malfunction (without UVB)
Rear Vision Camera System Malfunction (without UVB)
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) 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 inside rearview mirror and rearview camera indicating that camera operation is requested. Ignition voltage and ground are supplied to the rearview camera; the inside rearview mirror is supplied a common ignition voltage and ground source that is shared with other mirror operations. The rearview camera sends video information 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.
Reference Information
Schematic Reference
Object Detection Schematics ([1][2]Collision Avoidance and Parking Assist Systems)
Connector End View Reference
Component Connector End Views (Connector Views)
Description and Operation
Object Detection Description and Operation (Rear Parking Assist) (Object Detection Description and Operation (Rear Parking Assist))Object Detection Description and Operation (Rear Vision Camera) (Object Detection Description and Operation (Rear Vision Camera))
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 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.
2. Ignition ON, 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 rearview camera.
2. Ignition ON, transmission in PARK, verify a test lamp does not illuminate between the control circuit terminal 3 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, test or replace the rearview camera.
Rearview Camera System Does Not Display
1. Ignition OFF, disconnect the harness connector at the rearview camera.
2. Test for less than 10 Ohms between the ground circuit terminal 5 and ground.
• If greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify a test lamp illuminates between the ignition circuit terminal 6 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, verify a test lamp illuminates between the control circuit terminal 3 and ground.
• If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
5. Ignition OFF, disconnect the harness connector at the inside rearview mirror.
6. Ignition ON, test for less than 1 V between the following signal circuit terminals at the rearview camera harness connector and ground:
* Signal (+) circuit terminal 1
* Signal (-) circuit terminal 4
• If greater than the specified range, test the signal circuit for a short to voltage.
7. 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
• If not the specified value, test the circuit for a short to ground.
8. Test for less than 2 Ohms between the signal (+) circuit terminal 1 at the rearview camera harness connector and the signal (+) circuit terminal 6 at the inside rearview mirror harness connector.
• If greater than the specified range, test the signal circuit for an open/high resistance.
9. Test for less than 2 Ohms between the signal (-) circuit terminal 4 at the rearview camera harness connector and the signal (-) circuit terminal 7 at the inside rearview mirror harness connector.
• If greater than the specified range, test the signal circuit for an open/high resistance.
10. If all circuits test normal, test or replace the rearview camera.
11. Ignition ON, transmission in REVERSE, verify a clear rear vision image is displayed on the inside rearview mirror.
• If a clear rear vision image is not displayed, replace the inside rearview mirror.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Rearview Camera Replacement (Service and Repair)
* Control Module References (Programming and Relearning) for inside rearview mirror replacement, setup, and programming