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Circuit/System Testing

WARNING: This page is about a different car, the 2008 Buick Lucerne. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at each of the object sensors.
  2. Ignition ON, transmission in REVERSE, test for 7.5-9.0 volts between 8-volt reference circuit terminal 1 and ground.
    • If less than the specified range, test the 8-volt reference circuit for a short to ground. If the circuit tests normal, replace the object alarm module.
    • If greater than the specified range, test the 8-volt reference circuit for a short to voltage. If circuit tests normal, replace the object alarm module.
  3. Connect each rear object sensor one at a time while monitoring the scan tool Sensor Voltage Feed Output parameter. The parameter should be 7.2-9.2 volts.
    • If not within the specified range, test or replace the appropriate object alarm sensor.
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