B1054

Wiring Diagram:

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 (SDM) responds by flashing the AIR BAG warning lamp seven times. The SDM monitors the voltage levels at the PASSENGER AIR BAG ENABLE terminal 11 and PASSENGER AIR BAG DISABLE terminal 12.

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 illuminated.
^ 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 illuminated.
^ The voltage detected at PASSENGER AIR BAG ENABLE terminal ii and PASSENGER AIR BAG DISABLE terminal 12 are greater than 1.0 volts when the AIR BAG OFF lamp is illuminated.

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 I/P module enable 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 illuminated.
^ History DTC.
- You issue a scan tool CLEAR CODES command.
- Once 250 malfunction free ignition cycles have occurred.

DIAGNOSTIC AIDS
Refer to TABLES B and C to diagnose warning lamp circuit malfunctions. Table B Air Bag Warning Lamp Comes On Steady
Table C Air Bag Warning Lamp Does Not Come On

DTC TABLE TEST DESCRIPTION
Number(s) below refer to step number(s) on the diagnostic table.
2. This test determines if the AIR BAG ON lamp illuminates when the enable switch is in the ON position.
3. This test checks for a disconnected enable switch.
8. This test checks for an open in CKT 150.
10. This test checks for an open in CKT 1139 between the fuse block and the enable switch.
13. This test determines if the state of terminal 11 (Pass Air Bag Enable) of the SDM is correct when the enable switch is in the ON position.
14. This test checks for proper contact and/or corrosion of the SDM harness connector.
16. This test checks for an open in CKT 902.
18. This test checks for a short-to-ground in CKT 902.
21. This test determines if the state of terminal 12 of the SDM is correct when the enable switch is in the ON position.
24. This test checks for a short-to-B+ in CKT 901.
26. This test checks for a short circuit between CKT 901 and CKT 902.
28. This test determines if the AIR BAG OFF lamp illuminates when the enable switch is in the OFF position.
39. This test checks for a short-to-B+ in CKT 901.
41. This test checks for a short-to-B+ in CKT 902.
43. This test checks for an open in CKT 901.
46. This test determines if the state of terminal 11 of the SDM is correct when the enable switch is in the OFF position.
47. This test determines if the state of terminal 12 of the SDM is correct when the enable switch is in the OFF position.
48. This test determines if the state of the SDM suppression lamp driver is correct when the enable switch is in the OFF position.
49. This test checks for a short-to-ground in CKT 901.