Circuit Description
When the ignition switch is turned to ON, the sensing and diagnostic module(SDM) will perform turn-on test to diagnose critical malfunctions within 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.
The SDM checks the wiring connection to the passenger side airbag 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 ground. |
| • | The side air bag wiring of the passenger low is shorted to ground. |
Step | Action | Values | Yes | No |
|---|---|---|---|---|
|
Caution: Refer to Sensing and Diagnostic Module Handling Caution in the Preface section. Caution: Refer to SRS Sensing and Diagnostic Module Handling Caution in the Preface section. | ||||
1 |
Has the SDM discharged? | ∞ | Go to Step 2 | -- |
2 | Visually inspect any damage for the air bag wiring. Is the air bag wiring damaged? | -- | Go to Step 4 | Go to Step 3 |
3 | Measure the resistance between the high, low terminal of the passenger side air bag module and the ground. Is the resistance equal to the specified value? | 10 K ohms | Go to Step 5 | Go to Step 4 |
4 | Replace the air bag wiring. Is the replacement complete? | -- | Go to Step 7 | -- |
5 |
Is the DTC removed? | -- | System OK | Go to Step 6 |
6 | Replace the passenger side air bag module. Is the replacement complete? | -- | Go to Step 7 | -- |
7 |
Does the DTC reset? | -- | Go to Step 2 | System OK |
