AIR BAG Warning Lamp Comes On Steady

AIR BAG Warning Lamp Comes On Steady (part 1 Of 3):

AIR BAG Warning Lamp Comes On Steady (part 2 Of 3):

AIR BAG Warning Lamp Comes On Steady (part 3 Of 3):

Wiring Diagram:

CIRCUIT DESCRIPTION
The ignition switch supplies Ignition 1 voltage to the inflatable restraint Sensing And Diagnostic Module (SDM) at the Ignition Positive Voltage power circuit using the SIR Fuse. The ignition switch also supplies Ignition 1 voltage to the AIR BAG warning lamp using the IP-IGN Fuse. The AIR BAG warning lamp is connected to the INFLATABLE RESTRAINT INDICATOR at the Inflatable Restraint Indicator feed circuit of the SDM. When the ignition switch is first turned to the RUN position, the SDM responds by flashing the AIR BAG warning lamp seven times. If IGNITION 1 is outside of the normal operating voltage range (9.0 volts-16.0 volts) for more than 40 ms, the AIR BAG warning lamp will come ON solid with no DTCs set.

DIAGNOSTIC AIDS
In order to disable the shorting bar from the Inflatable Restraint Indicator feed circuit and the ground circuit inside the inflatable restraint Sensing And Diagnostic Module (SDM) wiring harness connector, the following two conditions must be met:
^ The SDM wiring harness connector must be properly connected to the SDM.
^ The Connector Position Assurance (CPA) must be properly installed in the SDM wiring harness connector.

TEST DESCRIPTION
The numbers below refer to the step numbers on the diagnostic table:
2. This step checks to see if the scan tool can communicate with the inflatable restraint sensing and diagnostic module (SDM).
3. This step checks to see if sufficient IGNITION voltage is applied to the SDM.
4. This step checks to see if excessive IGNITION voltage is applied to the SDM.
5. This step checks to see if the retainer assembly or the shorting bar is damaged or corroded.
7. This step checks to see if the SDM wiring harness connector terminals are damaged or corroded.
9. This step checks to see if the SDM terminals are damaged or corroded or if the lifting tab on the SDM is damaged.
10. This step checks to see if the SDM wiring harness connector properly connects to the SDM and if the Connector Position Assurance (CPA) is properly installed.
13. This step checks to see if there is a short to ground in the Inflatable Restraint Indicator control circuit.
14. This step determines if there is a short between the Inflatable Restraint Indicator control circuit and the ground circuit or if there is a short to ground in the Inflatable Restraint Indicator control circuit.
18. This step checks to see if the SIR Fuse is OK. An open SIR Fuse would cause the AIR BAG warning lamp to come ON steady.
19. This step checks to see if a short to ground caused the SIR Fuse to open.
20. This step checks for a short to ground in the Ignition Positive Voltage power circuit.
23. This step checks to see if the SDM wiring harness connector properly secures to the SDM.
29. This step checks to see if there is an open in the Ignition Positive Voltage power circuit.
31. This step determines if there is an open or a high resistance in the B+ feed circuit to the input side of the SIR Fuse or if there is a malfunctioning SDM.