Retrieving and Displaying DTCS

If a malfunction occurs in a system monitored by the BCM, the BCM stores a diagnostic trouble code (DTC) in memory. A current DTC means that the fault is present when the diagnostic mode was entered. Current DTCs are displayed with a beginning number 2 (2X). A history DTC means that the fault occurred sometime after the DTCs were last cleared from the BCM memory. History DTCs are displayed with a beginning number 3 (3X).

The DTCs are displayed as flash codes through the security indicator lamp on the instrument cluster when the BCM is in diagnostic mode. Perform the following steps in order to enter the BCM diagnostic mode:
1. Turn the ignition switch to the RUN position.
2. Turn the ignition switch to the OFF position.
3. Remove the Radio fuse from the I/P fuse block.
4. Turn the ignition switch to the ACCY position.
5. The BCM sounds 1 or 2 audible warning tones.
6. Within five seconds, turn the ignition switch to the OFF position and immediately (within 1 second) back to the ACCY position.
7. The BCM sounds 3 audible warning tones.

The BCM will begin flashing trouble codes using the security indicator 4 seconds after entering the diagnostic mode. Each series of quick flashes followed by a pause of the security indicator lamp on the instrument cluster represents a number in a 2 digit DTC. Each 2 digit DTC is displayed three times before the next DTC is displayed. DTCs are displayed in numerical order. Once the last DTC is displayed, the list begins again with the first DTC. This display rotation continues until the diagnostic mode is exited.