Circuit Description
When the ignition switch is turned to ON, the sensing and diagnostic module (SDM) will perform a turn-on test to diagnose critical malfunctions within the SDM itself.
Upon passing these test ignition and deployment loop voltages are measured to ensure that they are within their normal voltage ranges. The SDM monitors the voltages at the driver low and the passenger low to detect shorts to ground or voltage in the deploy loops.
Conditions for Setting the DTC
The resistance of driver air bag deployment loop is higher than 4.7 ohms.
Step | Action | Values | Yes | No |
|---|---|---|---|---|
|
Caution: Refer to Sensing and Diagnostic Module Voltage after Ignition is Turned Off Caution in the Preface section. Caution: Refer to Sensing and Diagnostic Module Handling Caution in the Preface section. | ||||
1 | Perform the Diagnostic System Check - SIR. Is the Diagnostic System Check - SIR completed? | -- | Go to Step 2 | |
2 | Examine the wiring and the connector at the driver air bag module. Is the connector disconnected? | -- | Go to Step 3 | Go to Step 4 |
3 |
Did you complete the repair? | -- | -- | |
4 |
Is the resistance as specified? | 0 ohms | Go to Step 5 | Go to Step 7 |
5 |
Is DTC 001 still shown as a current fault? | -- | Go to Step 6 | System OK |
6 | Replace the driver air bag module. Refer to Inflatable Restraint Steering Wheel Module Replacement . Did you complete the repair? | -- | -- | |
7 |
Does the ohmmeter show the specified value? | 0 ohms | Go to Step 8 | Go to Step 9 |
8 | Replace the clock spring. Refer to Inflatable Restraint Steering Wheel Module Coil Replacement . Did you complete the repair? | -- | -- | |
9 | Replace the supplemental inflatable restraints (SIR) wiring harness. Did you complete the repair? | -- | -- | |
