B1054

Circuit Description
In the RUN position, the ignition switch applies battery voltage to the AIR BAG warning lamp and to the IGNITION 1 input terminal 10. The Inflatable Restraint Sensing and Diagnostic Module responds by flashing the AIR BAG warning lamp 7 times. The Inflatable Restraint Sensing and Diagnostic Module monitors the voltage levels at the PASSENGER AIR BAG ENABLE terminal 11 and PASSENGER AIR BAG DISABLE terminal 12 of the Inflatable Restraint Sensing and Diagnostic Module to determine the position of the Inflatable Restraint Instrument Panel (IP) module switch.

Conditions for Setting the DTC
^ The voltage detected at PASSENGER AIR BAG ENABLE terminal 11 and PASSENGER AIR BAG DISABLE terminal 12 are less than 1.0 volt when the AIR BAG ON lamp is commanded on.
^ The voltage detected at PASSENGER AIR BAG ENABLE terminal 11 and PASSENGER AIR BAG DISABLE terminal 12 are greater than 4.0 volts when the AIR BAG ON lamp is commanded OFF.
^ The voltage detected at PASSENGER AIR BAG ENABLE terminal 11 and PASSENGER AIR BAG DISABLE terminal 12 are greater than 1.0 volt when the AIR BAG OFF lamp is commanded ON.

Action Taken When the DTC Sets
^ The Inflatable Restraint Sensing and Diagnostic Module (SDM) attempts to illuminate the AIR BAG OFF lamp.
^ The Inflatable Restraint IP module switch is defaulted to the disabled state.
^ The SDM sets a diagnostic trouble code.
^ The SDM turns ON the AIR BAG warning lamp.

Conditions for Clearing the DTC
^ Current DTC: The voltage at PASSENGER AIR BAG ENABLE terminal 11 is greater than 4.0 volts for 500 milliseconds and the voltage at PASSENGER AIR BAG DISABLE terminal 12 is less than 1.0 volts for 500 milliseconds when the AIR BAG ON lamp is commanded ON.
^ History DTC:
- You issue a scan tool CLEAR CODES command.
- After 250 malfunction tree ignition cycles have occurred

Diagnostic Aids
Refer to AIR BAG Warning Lamp Comes On Steady and AIR BAG Warning Lamp Does Not Come On to diagnose warning lamp circuit malfunctions. When measurements are requested in this table, use the J 39200 DMM with the correct terminal adapter from the J 35616-A Connector Test Adapter Kit.
When an inspection for proper connection is requested, refer to Testing for Electrical Intermittents. When a wire, connector or terminal repair is requested, use the J 38125-B Terminal Repair Kit and refer to Wiring Repairs. AIR BAG Warning Lamp Comes On Steady AIR BAG Warning Lamp Does Not Come On

Test Description
The numbers below refer to the step numbers on the diagnostic table:
2. This test determines if the AIR BAG ON lamp illuminates when the IP module switch is in the ON position.
3. This test inspects for a poor connection at the yellow 6-way IP module switch harness connector.
8. This test determines whether the malfunction is in circuit 150.
10. This test determines whether the malfunction is in circuit 1139 between the fuse block and the IP module switch.
13. This test determines if the state of terminal 11 of the SDM (Pass Air Bag Enable) is correct when the IP module switch is in the ON position.
14. This test inspects for proper contact or corrosion of the SDM harness connector.
16. This test inspects for an open circuit in circuit 371.
18. This test inspects for a short to ground in circuit 371.
21. This test determines if the state of terminal 12 of the SDM (Pass Air Bag Disable) is correct when the IP module switch is in the ON position.
24. This test inspects for a short to voltage in circuit 353.
26. This test inspects for a short circuit between circuit 353 and 371.
28. This test determines if the AIR BAG OFF lamp illuminates when the IP module switch is in the OFF position.
39. This test inspects for a short to voltage in circuit 353.
41. This test inspects for a short to voltage in circuit 371.
43. This test inspects for an open circuit in circuit 353.
46. This test determines if the state of terminal 11 of the SDM (Pass Air Bag Enable) is correct when the IP module switch is in the OFF position.
47. This test determines if the state of terminal 12 of the SDM (Pass Air Bag Disable) is correct when the IP module switch is in the OFF position.
48. This test determines if the state of the internal SDM suppression lamp driver is correct when the IP module switch is in the OFF position.
49. This test inspects for a short to ground in circuit 353.