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.
If driver side impact module inflation was caused by side impact, the SDM maintains warning lamp ON and the entire air bag system should be inspected, including pretensioners. The side air bag sensor and wiring should be replaced. If the driver side impact module inflation by side impact counts over 5, the SDM should also be replaced.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC 033
Conditions for Running the DTC
Ignition voltage is within the normal operating voltage range.
Conditions for Setting the DTC
The history of the air bag inflation or belt pretensioner explosion is in the SDM.
Action Taken When the DTC Sets
The SDM commands the AIR BAG indicator ON.
Conditions for Clearing the DTC
The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: SIR Schematics Connector End View Reference: SIR Connector End Views Caution: Refer to Sensing and Diagnostic Module Voltage after Ignition is Turned Off Caution in the Preface section. Caution: Refer to Sensing and Diagnostic Module Handling Caution in the Preface section. | |||
1 | Did you perform a Diagnostic System Check - Vehicle? | Go to Step 2 | |
2 |
Is there any visible damage to the SIR harness? | Go to Step 4 | Go to Step 3 |
3 | Replace the SDM. Refer to Inflatable Restraint Sensing and Diagnostic Module Replacement . Did you complete the repair? | Go to Step 5 | -- |
4 | Replace the SIR wiring harness. Did you complete the repair? | Go to Step 5 | -- |
5 |
Does the DTC reset? | Go to Step 2 | System OK |
