DTC 01

DTC1 Fasten Belt Indicator Lamp Control Circuit Shorted To B+ Or Ground:

DTC1 Fasten Belt Indicator Lamp Control Circuit Shorted To B+ Or Ground (Part 1 Of 2):

DTC1 Fasten Belt Indicator Lamp Control Circuit Shorted To B+ Or Ground (Part 2 Of 2):

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 circuit 529. The fasten seat belt indicator receives ground through circuit 1450.
The BCM turns ON the fasten seat belt indicator for 70 (+/- 7) seconds when the following conditions are met:
^ The ignition switch is in the RUN position.
^ The driver's seat belt is released (unfastened).

If the driver's seat belt is fastened during the 70 (+/- 7) second period, the BCM turns OFF both the fasten seat belt indicator. If the driver's seat belt is released anytime during the same ignition cycle. the BCM turns ON the fasten seat belt indicator again for 70 (+/ 7) seconds.

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

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

CONDITIONS FOR CLEARING THE DTC
^ A short to B+ or ground in circuit 529 is no longer present between the BCM and the instrument cluster.
^ After repairs are completed, DTC is cleared by performing the Clearing DTCs procedure.

DIAGNOSTIC AIDS
^ Check for a short to ground in circuit 529.
^ Check for a short to B+ in circuit 529.
^ An internal short to ground in the instrument cluster circuitry.
^ Try performing the tests shown while moving wiring and connectors. This can often cause the malfunction to appear.

TEST DESCRIPTION
Numbers below refer to the step numbers on the diagnostic table.
1. Always perform the BCM diagnostic system check before attempting to diagnose this DTC.
2. Checks for operation of the fasten seat belt indicator.
3. Checks for a short to ground in circuit 529.
4. Checks for a short to B+ in circuit 529.
5. Determines whether the BCM or the instrument cluster is faulty.
6. Checks for a faulty BCM.