DTC 034

DTC 24/34 Seatbelt Indicator Shorted To Ground Or Battery:

CIRCUIT DESCRIPTION
The Body Control Module (BCM) provides a 12 volt output to the FASTEN SEATBELT indicator lamp on the instrument cluster while the driver's seatbelt is unfastened.

CONDITIONS FOR SETTING THE DTC
The FASTEN SEATBELT output has been detected by the BCM to be shorted to the ground, or shorted to B+ for greater than 50 milliseconds.

ACTION TAKEN WHEN THE DTC SETS
The FASTEN SEATBELT indicator lamp does not illuminate when the following conditions exist:
^ The ignition is in the ON position.
^ The driver side seatbelt is not fastened.

CONDITIONS FOR CLEARING THE DTC
The fault is corrected and the DTC memory clearing procedure is completed.

DIAGNOSTIC AIDS
If the only DTC that flashes is a HISTORY code (DTC 34), the problem may be intermittent. Perform the lest shown while "wiggling" the wiring and connectors. This can often cause the fault to appear. Test for a poor connections at the BCM connector, which could cause an open or an intermittent fault. Refer to Intermittent/History DTCs in Diagnostic Trouble Code (DTC) Displaying DTCs Reading and Clearing Diagnostic Trouble Codes

TEST DESCRIPTION
The number(s) below refer to the step number(s) on the diagnostic table.
1. This step tests the FASTEN SEATBELT indicator for operation with the body control module (BCM) disconnected, which would reveal a short to B+ in circuit 237.
2. This step determines if there is a short to the ground in the instrument cluster.
4. If the instrument cluster is OK, this step determines if circuit 237 is shorted to the ground or if the BCM is defective.
7. If there is a short to B+, this step determines if the short is in the instrument cluster or in circuit 237.