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.
The 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 side air bag wiring of driver high is shorted to battery wiring. |
| • | The side air bag wiring of driver low is shorted to battery wiring. |
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 complete? | -- | Go to Step 2 | |
2 |
Is the air bag wiring damaged? | -- | Go to Step 4 | Go to Step 3 |
3 | Measure the resistance between the SDM and the high, low terminal of the driver side air bag module and the battery. Is the resistance at the specified value? | 10 K ohms | Go to Step 5 | Go to Step 4 |
4 | Replace the air bag wiring. Is the repair complete? | -- | -- | |
5 |
Is DTC 055 still shown as a current fault? | -- | Go to Step 6 | |
6 | Replace the driver side air bag module. Is the repair complete? | -- | -- | |
