DTC 001

Diagnostic Trouble Code Chart (Part 1 Of 2):

Diagnostic Trouble Code Chart (Part 2 Of 2):

Wiring Schematic:

CIRCUIT DESCRIPTION
The Body Control Module (BCM) controls the operation of the fasten seat belt indicator. The fasten seat belt indicator is located in the instrument cluster. The BCM turns ON the fasten seat belt indicator by sending voltage through CKT 529. The fasten seat belt indicator receives ground through CKT 1450.

The BCM turns ON the fasten seat belt indicator for 63-77 seconds when the following conditions are met:
^ The ignition switch is in the RUN position.
^ The driver's seat belt releases (unfastens).

If the driver's seat belt is fastened during the 63-77 seconds period, the BCM turns OFF the fasten seat belt indicator. If the driver's seat belt releases anytime during the same ignition cycle, the BCM turns ON the fasten seat belt indicator again for 63-77 seconds.

CONDITIONS FOR SETTING THE DTC
The BCM detects a short to B+ or ground in CKT 529.

ACTION TAKEN WHEN THE DTC SETS
^ The BCM sets the Diagnostic Trouble Code (DTC) 1.
^ The fasten seat belt indicator lamp does not turn on when CKT 529 shorts to ground.
^ The fasten seat belt indicator lamp stays on at all times when CKT 529 shorts to B+.

CONDITIONS FOR CLEARING THE MIL/DTC
^ A short to B+ or ground in CKT 529 is no longer present between the BCM and the instrument cluster.
^ After you complete the repairs, the DTC is cleared by performing the Clearing Diagnostic Trouble Codes (DTCs) procedure.

DIAGNOSTIC AIDS
^ Inspect for a short to ground in CKT 529.
^ Inspect for a short to B+ in CKT 529.
^ Inspect for an internal short to ground in the instrument cluster circuity.
^ Attempt to perform the tests shown while moving the wiring and the connectors.
This procedure can show where the malfunction may appear.

TEST DESCRIPTION
The number(s) below refer to the step number(s) on the diagnostic table.
1. Always perform the BCM diagnostic system check before attempting to diagnose the DTC.
2. Perform the tests for the operation of the fasten seat belt indicator.
3. Perform the tests for a short to ground in CKT 529.
4. Perform the tests for a short to B+ in CKT 529.
5. Determine whether the BCM or the instrument cluster is faulty.
6. Perform the tests for a faulty BCM.