Diagnostic Indicator Pattern 1

WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

Enter the diagnostic mode. Refer to Diagnostic Trouble Code (DTC) Displaying .
Verify that the Diagnostic Indicator Pattern 1 does not display as shown in the diagnostic indicator list. Refer to Diagnostic Trouble Code (DTC) Displaying .
- If the Diagnostic Indicator Pattern 1 displays after entering the diagnostic mode, proceed to the next Diagnostic Indicator Pattern displayed.

If the Diagnostic Indicator Pattern 1 does not display after successfully entering the diagnostic mode, test the rear park assist diagnostic input circuit terminal 16 for a short to voltage or an open/high resistance. If the circuit tests normal, test or replace the rear object sensor control module.