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Circuit/System Testing

  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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