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.
The SDM inspects the wiring connection to the passenger air bag module by letting the perpetual current flow through the internal circuit and verify the resistance.
Conditions for Setting the DTC
The resistance of the passenger air bag deployment loop is over 3 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 passenger air bag. Is the connector disconnected? | -- | Go to Step 2 | Go to Step 3 |
2 | Connect the connector and perform the Diagnostic System Check - SIR. Has the Diagnostic System Check - SIR been performed? | -- | Go to Step 3 | |
3 |
Is the resistance equal to the specified value? | 0 ohms | Go to Step 4 | Go to Step 6 |
4 |
Is the DTC removed? | -- | Go to Step 5 | |
5 | Replace the passenger air bag module. Refer to Inflatable Restraint Instrument Panel Module Replacement . Is the replacement complete? | -- | -- | |
6 | Replace the air bag wiring. Is the replacement complete? | -- | -- | |
