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.

Diagnostic Fault Information

Circuit

Short to Ground

Open or High Resistance

Short to Voltage

Signal Performance

Information Center Indicator Supply Voltage Circuit

B0968

1

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Information Center Indicator Control Circuits (Rear Left Amber, Center Amber and Red Indicator)

B0968

1

1

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1. Information Center Telltale Malfunction

Circuit/System Description

The object alarm system senses how close the vehicle is to an object. The distance is determined by the 4 ultrasonic sensors located in the rear bumpers. The object detection system will notify the driver when backing up while parking at speeds less than 8 km/h (5 mph). The object alarm system makes parking easier and helps avoid colliding with objects such as parked vehicles. The object alarm system will use the telltale assembly information center indicators and the radio speakers to notify the driver when an object is within the object alarm system field of view. Power is provided to the telltale assembly information center by the object alarm module via the telltale assembly supply voltage circuit. The telltale assembly information center indicators are controlled by the object alarm module via the indicator control circuits. The object alarm module provides the ground for the indicator control circuits.

Reference Information

Schematic Reference

Object Detection Schematics

Connector End View Reference

Object Detection Connector End Views

Description and Operation

Object Detection Description and Operation

Electrical Information Reference

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

Scan Tool Reference

    •  Scan Tool Output Controls
    •  Scan Tool Data List
    •  Scan Tool Data Definitions

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the object alarm module.
  2. Ignition ON, with the telltale assembly supply voltage circuit connected to B+, verify that each telltale assembly indicator illuminates when each indicator control circuit terminal(s) B, C and D is connected to ground.
  3. If one or two indicators of the telltale assembly does not illuminate, test the control circuit(s) for a short to ground or an open/high resistance. If the circuit(s) test normal, replace the telltale assembly information center.
    If all the indicators of the telltale assembly does not illuminate, test the supply voltage circuit for a short to ground or an open/high resistance. If the circuit(s) test normal, replace the telltale assembly information center.
  4. If all circuits test normal, test or replace the rear object alarm module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    •  Information Center Telltale Assembly Replacement
    •  Control Module References for the object alarm module replacement, setup, and programming