Clearing Trouble Codes

Trouble codes should be cleared after repairs have been made. Also, some diagnostic charts will tell you to clear codes before using the chart. This allows the ECM to set the code while going through the chart, which will help to find the cause of the problem more quickly.

Turn ignition on and ground diagnostic test terminal at ALCL connector. Turn ignition off and remove ECM fuse from fuse block for 10 seconds or more. Remove test lead from ALCL connector.