DTC 026

CIRCUIT DESCRIPTION

SIR Schematics: Power, Ground, Serial Data, Indicator and Front Inflatable Restraint Modules:

SIR Schematics: Seat Belt Pretensioners, Side Inflatable Restraint Modules, and Sensors:

The seat belt pretensioner - RF deployment loop consists of the seat belt pretensioner - RF, the seat belt pretensioner - RF high circuit and the seat belt pretensioner - RF low circuits. A shorting bar is used in the seat belt pretensioner - RF connector which will short together the seat belt pretensioner - RF high and the seat belt pretensioner - RF low circuits when the connector is disconnected. This will help prevent unwanted deployment of the seat belt pretensioner - RF during servicing. When the ignition is turned ON, the Inflatable Restraint Sensing And Diagnostic Module (SDM) performs continuous diagnostic tests on the deployment loop to check for proper circuit continuity and for shorts to ground or voltage. If a malfunction is detected, the SDM will store a Diagnostic Trouble Code (DTC).

CONDITIONS FOR RUNNING THE DTC
Ignition 1 voltage is within the normal operating voltage range.

CONDITIONS FOR SETTING THE DTC
The measured leakage current to voltage is above the specified value in the seat belt pretensioner - RF deployment loop.

ACTION TAKEN WHEN THE DTC SETS
The SDM turns 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.
^ A history DTC will clear once 255 malfunction free ignition cycles have occurred.

DIAGNOSTIC AIDS
Thoroughly inspect the wiring and the connectors An incomplete inspection of the wiring and the connectors may result in misdiagnosis, causing a part replacement with the reappearance of the malfunction

The following are possible causes of the malfunction:
^ A short to voltage in the seat belt pretensioner - RF high or the seat belt pretensioner - RF low circuits
^ The seat belt pretensioner - RF connector
^ A malfunctioning seat belt pretensioner - RF
^ The SDM connector
^ An internal SDM malfunction

If an intermittent condition exists, refer to Testing for Intermittent and Poor Connections in Diagrams.

TEST DESCRIPTION

Steps 1-3:

Steps 4-10:

The number(s) below refer to the step number(s) on the diagnostic table.
4. Tests to see if the malfunction is intermittent.
5. Tests to see if the malfunction is caused by the seat belt pretensioner - RF.
8. Tests to see if there is a short to voltage in the seat belt pretensioner - RF high or the seat belt pretensioner - RF low circuits.