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 passenger seat belt switch wiring is opened or shorted to battery wiring.
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 the connector and the wiring of the passenger seat belt switch. Is the passenger seat belt switch wiring damaged? | -- | Go to Step 5 | Go to Step 3 |
3 |
Is the resistance equal to the specified value? | 10 K ohms | Go to Step 4 | Go to Step 5 |
4 |
Is the DTC removed? | -- | Go to Step 6 | |
5 | Replace the air bag wiring. Is the replacement complete? | -- | -- | |
6 | Replace the passenger buckle assembly. Is the replacement complete? | -- | -- | |
