Parking Assist Indicator Malfunction

Parking Assist Indicator Malfunction

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

The parking assist indicator is located in the interior rear of the vehicle as part of the information center telltale assembly. The indicator contains three LEDs: two amber and one red. The object alarm module controls these three LEDs as a visual indicator of how close the vehicle bumper is to an object. The object alarm module supplies voltage to each of the LEDs and commands each LED on by supplying an individual ground.

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 (PIDS) (Object Detection Description and Operation (PIDS))Object Detection Description and Operation (Rear Parking Assist) (Object Detection Description and Operation (Rear Parking Assist))
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)

Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information

Circuit/System Verification

Ignition ON, perform the scan tool LED Test. Each of the three LEDs should illuminate during the test cycle.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the information center telltale assembly.
2. Ignition ON, test for B+ between the supply voltage circuit terminal A and ground.

• If less than the specified range, test the supply voltage circuit terminal for a short to ground or an open/high resistance. If the circuit tests normal, replace the object alarm module.
• If greater than the specified range, test the control circuit terminal for a short to voltage. If the circuit tests normal, replace the object alarm module.

3. Command the appropriate LED ON with a scan tool and test for B+ between the appropriate control circuit listed below and ground:

* Amber 1 LED - terminal B
* Amber 2 LED - terminal C
* Red LED - terminal D

• If less than the specified range, test the control circuit terminal for a short to ground or an open/high resistance. If the circuit tests normal, replace the object alarm module.
• If greater than the specified range, test the control circuit terminal for a short to voltage. If the circuit tests normal, replace the object alarm module.

4. If all circuits test normal, test or replace the information center telltale assembly.

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Information Center Telltale Assembly Replacement (Service and Repair)
* Control Module References (Programming and Relearning) for the object alarm module replacement, setup, and programming