Front View Camera Module Malfunction (UEU)
Front View Camera Module Malfunction (UEU)
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
The forward collision alert system is controlled by the front view camera module mounted on the windshield. The forward collision alert system is always active and operates at speeds above 40 km/h (25 mph). When the system detects a vehicle in the path ahead, the green vehicle ahead alert indicator in the vehicle direction display is illuminated. When approaching another vehicle too rapidly, the collision alert symbol will flash in the vehicle direction display and the radio will simultaneously give an audible alert sound. The red collision alert display will stay continuously illuminated if the vehicle ahead remains much too close. These actions are requested by the front view camera module via serial data. The forward collision alert switch is part of the left steering wheel controls and is used to adjust the timing sensitivity of the front collision alert system.
Diagnostic Aids
Certain factors will affect the operation of the forward collision alert system. Forward collision alert does not warn the driver of any objects that are not detected as a vehicle, like e.g. pedestrians, animals, signs, guard rails, bridges, construction barrels or other stationary or slow moving objects. In some cases the camera may detect a vehicle that is not in the path ahead, or the system may occasionally provide unrealistic alerts. This could respond to a turning vehicle ahead, guard rails, traffic signs, or other stationary objects. This is normal operation, the vehicle does not need service. When the system is operating properly, the green vehicle ahead alert indicator will illuminate on the vehicle direction display when the system detects a vehicle in the path ahead. This indicates that all of the required operating conditions are met. The green vehicle ahead alert indicator will not appear when the system is having difficulty seeing other vehicles on the road or if the view of the front view camera is blocked with mud, dirt, snow, ice, or slush, if the windshield is damaged, or when weather limits visibility, such as while driving in fog, rain, or snow conditions. This is normal operation, the vehicle does not need service.
Additionally, the Front View Camera Disable History can give useful hints about what affected the operation of the lane departure warning system. For the Front View Camera Disable History please refer to DTC B1011 B1011.
Reference Information
Schematic Reference
Object Detection Schematics [1][2]Collision Avoidance and Parking Assist Systems
Connector End View Reference
Component Connector End Views Sunshade - Left Front
Description and Operation
Object Detection Description and Operation (UD7) Object Detection (UD7)Object Detection Description and Operation (Front View Camera with UEU) Object Detection Description and Operation (Front View Camera with UEU)Object Detection Description and Operation (Front View Camera with UFL) Object Detection Description and Operation (Front View Camera with UFL)Object Detection Description and Operation (UVC) Object Detection (UVC)
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 Programming and Relearning for scan tool information
Circuit/System Verification
Note: Refer to Diagnostic Aids before performing Circuit/System Verification.
1. Observe the scan tool Forward Collision Alert Function Status parameter. The parameter should show Off, Disabled, Not Ready To Assist or Ready To Assist.
• If the parameter shows Malfunction, refer to Forward Collision Alert System Malfunction in Circuit/System Testing.
2. Drive the vehicle behind another vehicle with sufficient safety distance. The green vehicle ahead alert indicator in vehicle direction display should turn ON when the vehicle on the path ahead is detected. With no vehicle driving in front of the host vehicle, increasing the safety distance or changing the driving path, the green vehicle ahead alert indicator in the instrument panel should turn OFF.
• If the indicator does not turn ON and OFF, refer to Forward Collision Alert System Malfunction in Circuit/System Testing.
3. Inspect the area of the K109 Frontview Camera Module for contamination.
• If it needs to be cleaned, clean the windshield.
Circuit/System Testing
Note: You must perform the Circuit/System Verification before proceeding with Circuit/System Testing.
Forward Collision Alert System Malfunction
1. Verify no DTCs are set. If any DTCs are set, diagnose those first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle.
2. Ignition OFF, remove the ignition key, open the driver door and disconnect the scan tool, all vehicle systems OFF, this may take up to 2 min.
3. Disconnect the harness connector at the K109 Frontview Camera Module.
4. Connect a test lamp between the K109 Frontview Camera Module B+ circuit terminal 3 and ground.
• If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K109 Frontview Camera Module.
5. Test for less than 5 ohms between the ground circuit terminal 1 and ground.
• If greater than the specified value, test the ground circuit for an open/high resistance. If the circuit tests normal, replace the K109 Frontview Camera Module.
6. Test for infinite resistance between the forward collision alert switch signal circuit terminal 10 and ground with the forward collision alert switch not pressed.
• If less than infinite resistance, test the switch signal circuit for a short to ground. If the circuit tests normal, replace the S70L Steering Wheel Controls Switch - Left.
7. Test for 1.2-1.4 kohms between the forward collision alert switch signal circuit terminal 10 and ground with the forward collision alert switch pressed.
• If greater than the specified value, test the switch signal circuit for an open high resistance. If the circuit tests normal, replace the S70L Steering Wheel Controls Switch - Left.
8. If all circuits test normal, replace the K109 Frontview Camera Module.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Cruise Control Switch Replacement (NK5) Cruise Control Switch Replacement (NK5)Cruise Control Switch Replacement (NP5) Cruise Control Switch Replacement (NP5)
* Control Module References Programming and Relearning for front view camera replacement, programming and setup