ASC Diagnostic Troubleshooting Strategy

ASC DIAGNOSTIC TROUBLESHOOTING STRATEGY
Use these steps to plan your diagnostic strategy. If you follow them carefully, you will be sure that you have exhausted most of the possible ways to find an ASC fault.

1. Gather information about the problem from the customer.
2. Verify that the condition described by the customer exists.
3. Check the vehicle for any ASC DTC.
4. If you cannot verify the condition and there are no ASC DTCs, the malfunction is intermittent.
5. If you can verify the condition but there are no ASC DTCs, or the system cannot communicate with the scan tool, check that the basic brake system is operating properly.
^ If the basic brake system is not operating properly, refer to the Basic Brake System Diagnostic troubleshooting strategy Basic Brake System Diagnostic Troubleshooting Strategy.
^ If the basic brake system is operating properly, refer to Symptom Chart.
6. If there is an ASC DTC, record the number of the DTC, then erase the DTC from the memory using the scan tool.
7. Recreate the ASC DTC set conditions to see if the same ASC DTC will set again.
^ If the same ASC DTC sets again, perform the diagnostic procedures for the DTC. Refer to Diagnostic Trouble Code Descriptions.
^ If you cannot get the same ASC DTC to set again, the malfunction is intermittent.