DTC 001

DTC 1 Fasten Seat Belt Indicator Control Circuit Shorted B+ or Ground

Schematic:

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

The BCM turns ON the seat belt indicator for 55 seconds when the following conditions are met:
^ The ignition switch is ON
^ The driver's seat belt releases (unfastens).

If the driver's seat belt is fastened during the 55 second period, the BCM turns OFF the seat belt indicator. If the driver's seat belt releases anytime during the same ignition cycle, the BCM turns ON the seat belt indicator again for 55 seconds.

CONDITIONS FOR RUNNING THE DTC
Ignition voltage is within the normal operating voltage range.

CONDITIONS FOR SETTING THE DTC
The BCM detects a short to B+ or ground in the seat belt indicator supply voltage circuit.

ACTION TAKEN WHEN THE DTC SETS
^ The seat belt indicator lamp does not turn on when the seat belt indicator supply voltage circuit shorts to ground.
^ The seat belt indicator lamp stays on at all times when the seat belt indicator supply voltage circuit shorts to B+.

CONDITIONS FOR CLEARING THE DTC
^ A short to B+ or ground in the seat belt indicator supply voltage circuit is no longer present between the BCM and the instrument cluster.
^ After you complete the repairs, clear the DTC. Refer to Diagnostic Trouble Code (DTC) Clearing.

DIAGNOSTIC AIDS
^ Inspect for a short to ground in the seat belt indicator supply voltage circuit.
^ Inspect for a short to B+ in the seat belt indicator supply voltage circuit.
^ Inspect for an internal short to ground or short to B+ within the instrument cluster circuity.

TEST DESCRIPTION

Diagnostic Chart:

The number(s) below refer to the step number(s) on the diagnostic table.
2. This step determines if there is a short to ground or a short to B+ in the seat belt indicator supply voltage circuit.
3. This step determines if there is a short to B+ in the seat belt indicator supply voltage circuit or if there is a malfunctioning BCM.
5. This step determines if there is a short to B+ in the seat belt indicator supply voltage circuit or if there is a malfunctioning instrument cluster.
8. This step determines if there is a short to ground in the seat belt indicator supply voltage circuit or if there is a malfunctioning instrument cluster.