GM Service Manual Online
For 1990-2009 cars only

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

DTC Descriptor

DTC B0968 00: Park Assist Indicator Circuit Malfunction

Circuit/System Description

The park assist switch is equipped with a light that indicates when the park assist system is enabled or disabled. When the park assist system is enabled the light is turned on.

Conditions for Running the DTC

    • DTC B1325 is not set
    • Ignition is in RUN mode

Conditions for Setting the DTC

The object alarm module detects a malfunction with the park assist switch light.

Action Taken When the DTC Sets

    • The park assist system is disabled.
    • The park assist switch light will not turn on.

Conditions for Clearing

    • The object alarm module clears the history DTC when a current DTC is not detected in 100 ignition cycles.
    • The condition for the DTC is no longer present.

Reference Information

Schematic Reference

Object Detection Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Object Detection Description and Operation

Electrical Information Reference

    •  Circuit Testing
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs
    •  Connector Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Park brake OFF, transmission in REVERSE, the park assist switch light should turn on.

Circuit/System Testing

  1. Ignition OFF, disconnect the park assist switch.
  2. Test for less than 5 Ω between the low reference circuit terminal 8 and ground.
  3. If greater than the specified range, test the ground circuit for an open/high resistance. If the circuit tests normal, replace the object alarm module.
  4. Ignition ON, transmission in REVERSE, test for 1.7 - 3.3 V between the voltage reference circuit terminal 7 and ground.
  5. If greater than the specified range, test the voltage reference circuit for a short to voltage. If the circuit tests normal, replace the body control module.
    If less than the specified range, test the voltage reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the body control module.
  6. If the circuit tests normal, replace the park assist switch.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

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