The BCM does not turn the SERVICE ENGINE SOON malfunction indicator lamp (MIL) to the ON position. The BCM turns the SECURITY malfunction indicator lamp (MIL) to the ON position for Passlock-related malfunctions. The recommended method for reading DTCs that are stored in the memory is to use a scan tool plugged into the DTC connector. The DTC connector is located under the instrument panel on the left side. Follow the scan tool instructions that are supplied by the tool manufacturer. The DTCs are stored in the memory of the body control module (BCM) as a current or a history DTC.

The BCM sets the code as a current DTC when the following conditions exist:

All DTCs remain current until the following conditions exist:

The current code changes to a history code only when all of the above conditions are true.

When a DTC reports a failure and the failure is not in the current wake up cycle, that DTC is stored as a history DTC code. The BCM performs internal diagnostic tests in order to acknowledge that the related systems have reported a pass or fail condition. Each diagnostic test that fails is recorded in the BCM memory. The BCM memory may be accessed with a scan tool in order to determine which DTC circuit is at fault.

Clear a history DTC by using one of the following methods:

After you diagnose the problem and repair the discovered malfunction, clear any DTCs set and verify proper operation. In order to verify proper operation, duplicate the conditions when the customer's complaint occurred. If a DTC was set, duplicate the test conditions for that DTC. The test conditions are listed above the DTC table. Refer to Conditions for Setting the DTC. The DTC should not re-set after the repair has been made.