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.
Each seat belt switch is cyclic monitored. The time of the buckle status change is 2 seconds. When the SDM cannot define the buckle status for 25 cycles, the SDM recognizes that the buckle is not stable and generates a buckle status settle fault.
Conditions for Setting the DTC
The driver seat belt switch is inoperative.
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 the connector and the wiring of the driver seat belt switch. Is the driver seat belt switch wiring damaged? | Go to Step 3 | Go to Step 4 |
3 | Replace the air bag wiring. Is the repair complete? | -- | |
4 | Replace the driver buckle assembly. Is the repair complete? | -- | |
