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. The SDM inspects the wiring connection to the passenger air bag module by letting the infinitesimal current flow through the internal circuit and verify the resistance.
Conditions for Setting the DTC
| • | The side air bag wiring of the passenger high is shorted to battery wiring. |
| • | The side air bag wiring of the passenger 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 passenger side air bag module and the ground. 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 059 still shown as a current fault? | -- | Go to Step 6 | |
6 | Replace the passenger side air bag module. Is the repair complete? | -- | -- | |
