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.
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
A communication error occurs between the SDM and the driver side air bag sensor.
Step | Action | 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 driver side air bag sensor wiring. Is the driver side air bag sensor wiring damaged? | Go to Step 3 | Go to Step 4 |
3 | Replace the air bag wiring. Is the replacement complete? | -- | |
4 |
Is the DTC removed? | Go to Step 5 | |
5 | Replace the SDM. Refer to Inflatable Restraint Sensing and Diagnostic Module Replacement . Is the replacement complete? | -- | |
