B1017

Circuit Description

When you first turn the ignition switch to the RUN position, the Inflatable Restraint Sensing and Diagnostic Module (SDM) performs tests in order to diagnose critical malfunctions within the module. Next the SDM measures the ignition positive voltage in order to ensure that the voltage is within the respective normal voltage range. Then the SDM proceeds with the deployment loop continuity test. During the deployment loop continuity test, the SDM measures the voltage difference between the PASSENGER HIGH and the PASSENGER LOW.

Conditions for Setting the DTC

^ The voltage difference between the PASSENGER HIGH terminal 1 and the PASSENGER LOW terminal 4 is more than or equal to 400 millivolts.

^ The malfunction must be present for at least 500 milliseconds during one of the following tests:

- Deployment loop continuity

If the malfunction is detected in this test, the resistance measurement test will not be performed.

- Continuous monitoring

Action Taken When the DTC Sets

^ The SDM sets a diagnostic trouble code.

^ The SDM turns ON the AIR BAG Warning Indicator.

Conditions for Clearing the MIL/DTC

^ Current DTC

The voltage difference between PASSENGER HIGH terminal 1 and PASSENGER LOW terminal 4 is less than 400 millivolts for 500 milliseconds.

^ History DTC

- You issue a scan tool CLEAR CODES command.

- Once 250 malfunction free ignition cycles have occurred.

Diagnostic Aids

The following conditions may cause an intermittent condition:

^ A poor connection at the Inflatable Restraint I/P module harness connector terminals A and B

^ A poor connection at the SDM terminals 1 and 4

^ An open in circuit 1403

^ An open in circuit 1404

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 Intermittents and Poor Connections. 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 determines the deployment loop voltage difference measured by the Inflatable Restraint Sensing and Diagnostic Module (SDM).

3. This test checks for proper contact or corrosion of the yellow 2-way connector.

10. This test isolates the malfunction to one side of the Inflatable Restraint Instrument Panel (IP) module yellow 2-way connector.

12. This test checks for proper contact or corrosion of the SDM harness connector.

17. This test determines whether the malfunction is in circuit 1403.

19. This test determines whether the malfunction is in circuit 1404.