B1132

Circuit Description
When you first turn the ignition switch to the ON position, the Inflatable Restraint Sensing and Diagnostic Module (SDM) performs tests in order to diagnose critical malfunctions within itself. Next the SDM measures Ignition 1 and the deployment loop voltages in order to ensure that they are within their respective normal voltage ranges. Then the SDM proceeds with the Resistance Measurement test. During one portion of the Resistance Measurement test, the SDM does the following:
^ Grounds the Passenger Pretensioner Low terminal 11 through an internal current sink.
^ Connects the Passenger Pretensioner High terminal 12 to an internal constant current source. This current produces proportional voltage drops in the deployment loop.
^ Measures the voltage difference between Passenger Pretensioner High and Passenger Pretensioner Low.
^ Calculates the resistance of the passenger pretensioner deployment loop using the measured voltage.

Conditions for Setting the DTC
^ The passenger and driver pretensioner deployment loops are not open.
^ The passenger and driver pretensioner deployment loops are not shorted to voltage.
^ The passenger pretensioner deployment loops are not shorted to ground.
^ The passenger pretensioner deployment loop resistance is less than 1.3 ohms. The passenger pretensioner deployment loop consists of the following components:
- Passenger seat belt pretensioner.
- Harness wiring of circuit 2116.
- Harness wiring of circuit 2117.
- Connector terminal contact.

The Resistance Measurement test checks for this malfunction. This test only occurs once each ignition cycle when Ignition 1 is within the normal operating voltage range.

Action Taken When the DTC Sets
^ The SDM sets a Diagnostic Trouble Code (DTC).
^ The SDM commands the instrument cluster (IPC) to turn ON the AIR BAG warning lamp.

Conditions for Clearing the MIL/DTC
^ Current DTC
The resistance of the passenger pretensioner deployment loop is more than 1.3 ohms and the ignition switch is cycled.
^ History DTC
- You issue a scan tool Clear DTCs command.
- Once 250 malfunction tree ignition cycles have occurred.

When you issue a scan tool Clear DTCs command and the malfunction is still present, the DTC will not reappear until the next ignition cycle.

Diagnostic Aids
The following can cause an intermittent condition:
^ A short circuit between CKT2116 and CKT2118.
^ A short circuit between circuit 2116 and circuit 2119.
^ A short circuit between circuit 2116 and circuit 2117.
^ A malfunctioning shorting bar on the passenger seat belt pretensioner connector.

When measurements are requested in this table, use J 39200 Digital Multimeter with the correct terminal adapter from J 35616-A Connector Test Adapter Kit. When a check for proper connection is requested, refer to Diagrams. When a wire, connector or terminal repair is requested, use J 38125-B Terminal Repair Kit and refer to Wiring Repair.

Test Description
The numbers below refer to the step numbers on the diagnostic table:
2. This test checks for a short from circuit 2118 to circuit 2116.
4. This test checks for proper contact or corrosion of the side air bag/pretensioner yellow 6-way connector.
5. This test isolates the malfunction to one side of the side air bag/pretensioner yellow 6-way connector.
6. This test isolates the malfunction to the jumper harness or the pretensioner.
9. This test checks for a short from circuit 2116 to circuit 2117.
11. This test checks for a short from circuit 2116 to circuit 2118.