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 RH PRETENSIONER LOW terminal 6 to calculate the combined resistance of the seat belt pretensioner and its associated wiring.
Conditions for Setting the DTC
The SDM detects an open circuit or high resistance in the seat belt pretensioner deployment loop.
Action Taken When the DTC Sets
| • | The SDM sets a Diagnostic Trouble Code. |
| • | The SDM flashes 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 an open in the RH pretensioner high or low circuits.
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This test determines if the malfunction is caused by the SDM.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the SIR Diagnostic System Check performed? | -- | ||
Is the resistance measured less than the specified value? | 1ohms | |||
Is DTC 64 present? | -- | |||
4 | Replace the inflatable restraint Sensing and Diagnostic Module (SDM). Refer to Inflatable Restraint Sensing and Diagnostic Module Replacement . Are the repairs complete? | -- | -- | |
5 | Replace the passenger seat belt. Refer to Seat Belt Retractor Replacement - Right Front in Seat Belts. Are the repairs complete? | -- | -- | |
6 | Repair the wiring harness between the pretensioner and the SDM. Refer to Wiring Repair . Are the repairs complete? | -- | -- | |
7 | Reconnect all SIR components. Make sure all components are properly mounted. Have all the SIR components been reconnected and properly mounted? | -- | -- |
