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 supplemental restraint sensing and diagnostic module responds by flashing the AIR BAG warning lamp 7 times. The supplemental 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 supplemental restraint sensing and diagnostic module to determine the position of the supplemental restraint 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 1 land 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 1 land 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 supplemental restraint sensing and diagnostic module (SDM) attempts to illuminate the AIR BAG OFF lamp.
- The supplemental 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 free 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 J 39200 Digital Multimeter with the correct terminal adapter from J 35616-A Connector Test Adapter Kit. When an inspection for proper connection is requested, refer to Intermittents and Poor Connections. When a wire, connector or terminal repair is requested, use J 38125-B Terminal Repair Kit and refer to Wiring Repair.
Step 1:
Steps 2 - 5:
Steps 6 - 10:
Steps 11 - 13:
Steps 14 - 17:
Steps 18 - 21:
Steps 22 - 24:
Steps 25 - 29:
Steps 30 - 34:
Steps 35 - 40:
Steps 41 - 45:
Steps 46 - 50:
Steps 51 - 53:
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 CKT 1050.
10. This test determines whether the malfunction is in CKT 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 CKT 371.
18. This test inspects for a short to ground in CKT 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 fora short to voltage in CKT 353.
26. This test inspects for a short circuit between CKT 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 CKT 353.
41. This test inspects for a short to voltage in CKT 371.
43. This test inspects for an open circuit in CKT 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 CKT 353.