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Home >> GMC >> 2007 >> Acadia SLE, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 340 (Object Detection System) >> Diagnostic Information and Procedures >> Rear Parking Assist Inoperative - Red Indicator Flashes >> Circuit/System Testing >> Diagnostic Indicator Pattern 8 and 9
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Diagnostic Indicator Pattern 8 and 9

WARNING: This page is about a different car, the 2007 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: Diagnostic indicator patterns 8 or 9 are displayed in sequence of diagnostic indicator patterns 2, 3, 4 and 5.
  1. While still in the diagnostic mode, disconnect the rear object sensor(s) one at a time and verify that the indicator pattern 8 or 9 does not display after the suspect sensor(s) has been disconnected. When the suspect sensor(s) is disconnected, the indicator pattern 8 or 9 should no longer be displayed.
    • If the indicator pattern 8 or 9 continues to display after each sensor has been disconnected and reconnected, test the object sensor supply voltage circuit and the low reference circuit for a short to ground or an open/high resistance. If circuit tests normal, replace the rear object sensor control module.
    • If the indicator pattern 8 and 9 does not display after disconnecting the suspect sensor, replace the suspect sensor.
  2. If all circuits test normal, replace the object sensor control module.
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