Circuit Description
When you first turn the ignition switch to the ON position, the inflatable restraint Sensing and Diagnostic Module (SDM) performs tests to diagnose critical malfunctions within itself. The SDM monitors the voltages at terminal 8 to calculate the combined resistance of the IP module and its associated wiring.
Conditions for Setting the DTC
The SDM detects low resistance in the passenger deployment loop.
Action Taken When the DTC Sets
| • | The SDM sets a Diagnostic Trouble Code. |
| • | The SDM turns ON the AIR BAG warning lamp. |
Conditions for Clearing the DTC
All DTCs are cleared with each ignition cycle.
Test Description
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This test checks for a short between the passenger side high and low circuits.
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This test determines if the malfunction is caused by the SDM.
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This test determines if the malfunction is caused by the inflatable restraint instrument panel module.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the SIR Diagnostic System Check performed? | -- | ||
Is the resistance measured equal to the specified value? | OL (Infinite) | |||
Is DTC 53 present? | -- | |||
Is DTC 53 present? | -- | |||
5 | Replace the inflatable restraint Sensing and Diagnostic Module (SDM). Refer to Inflatable Restraint Sensing and Diagnostic Module Replacement . Are all repairs complete? | -- | -- | |
6 | Replace the inflatable restraint IP module. Refer to Inflatable Restraint Instrument Panel Module Replacement . Are all repairs complete? | -- | -- | |
7 | Repair the IP wiring harness between the IP module and the SDM. Refer to Wiring Repair . Are all repairs complete? | -- | -- | |
8 | An intermittent exists in the passenger deployment loop. Refer to diagnostic aids. Are all repairs complete? | -- | -- | |
9 | Reconnect all SIR components. Make sure all components are properly mounted. Have all the SIR components been reconnected and properly mounted? | -- | -- |
