DTC 043

Schematic:

CIRCUIT DESCRIPTION
When you first turn ON the ignition, the CLAMP 15 CRUISE Fuse applies battery voltage to the AIR BAG warning lamp. The AIR BAG warning lamp is controlled by the inflatable restraint sensing and diagnostic and seat belt pretensioner module (SDM). The ignition switch supplies battery voltage to the SDM, at terminal 5. The SDM responds by flashing the AIR BAG warning lamp seven times and then turning it OFF. The SDM monitors the AIR BAG warning lamp control circuit by comparing the output state of the AIR BAG warning lamp control circuit, at terminal 6 of the SDM, to the microprocessor commanded state.

CONDITIONS FOR RUNNING THE DTC
When the ignition voltage is within the normal operating voltage range, the SDM monitors the output state of the AIR BAG warning lamp control circuit, at terminal 6 of the SDM, to determine a mismatch between the output state and the commanded state.

CONDITIONS FOR SETTING THE DTC
The output state of the AIR BAG warning lamp control circuit, at terminal 6 of the SDM, does not match the commanded state for 1.25 seconds.

ACTION TAKEN WHEN THE DTC SETS
The SDM attempts to turn ON the AIR BAG warning lamp.

CONDITIONS FOR CLEARING THE DTC
^ You can issue a CLEAR CODES command
^ A history DTC will clear once 255 malfunction free ignition cycles have occurred.

DIAGNOSTIC AIDS
These malfunctions are addressed in A Diagnostic System Check - SIR. Perform A Diagnostic System Check SIR before continuing with this table.

TEST DESCRIPTION

Steps 1 - 10:

Steps 11 - 18:

2. This step checks the instrument cluster wiring harness connector.
4. This step checks the instrument cluster terminals.
6. This step checks the AIR BAG warning lamp.
8. This step checks the AIR BAG warning lamp socket within the instrument cluster.
9. This step checks for a short between the B+ feed circuit to the instrument cluster and the AIR BAG warning lamp control circuit.
11. This step checks for a short within the instrument cluster.
12. This step checks the SDM wiring harness connector.
16. This step determines if there is a short to B+ in the AIR BAG warning lamp control circuit or if there is a malfunctioning SDM.