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
The resistance of the 1st stage driver air bag deployment loop is higher than 4.5 ohms.
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 | Visually inspect the connector and the wiring of driver air bag. Is the connector disconnected? | -- | Go to Step 2 | Go to Step 3 |
2 | Perform the Diagnostic System Check - SIR. Is the SIR Diagnostic System Check complete? | -- | Go to Step 3 | -- |
3 |
Is the resistance equal to the specified value? | 0 ohms | Go to Step 4 | Go to Step 5 |
4 |
Is the DTC removed? | -- | Go to Step 8 | |
5 |
Is the resistance equal to the specified value? | 0 ohms | Go to Step 6 | Go to Step 7 |
6 | Replace the clock spring. Refer to Inflatable Restraint Steering Wheel Module Coil Replacement . Is the replacement complete? | -- | -- | |
7 | Replace the air bag wiring. Is the replacement complete? | -- | -- | |
8 | Replace the driver air bag module. Refer to Inflatable Restraint Steering Wheel Module Replacement . Is the replacement complete? | -- | -- | |
