B1017

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. Next the SDM measures IGNITION 1 voltage to make sure it is within its 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 Passenger Side High and Passenger Side Low,

Conditions for Setting the DTC
^ The voltage difference between the Passenger Side High terminal 4 and the Passenger Side Low terminal 3 is more than or equal to 400 millivolts.
^ The malfunction must be present for at least 500 milliseconds during one of the following tests:
- The Deployment Loop Continuity Test-If the malfunction is detected in this test, the Resistance Measurement test will not be performed.
- The Continuous Monitoring Test.

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
^ Clear the Current DTC when the voltage difference between the Passenger Side High terminal 4 and Passenger Side Low terminal 3 is less than 400 millivolts for 500 milliseconds.
^ Clear the History DTC under the following conditions:
- You issue a scan tool CLEAR CODES command.
- 250 malfunction free ignition cycles have occurred.

Diagnostic Aids
The following can cause and intermittent condition:
^ A poor connection at the Inflatable Restraint Instrument Panel (IP) module harness connector terminal 1 and terminal 2.
^ A poor connection at the SDM terminal 4 and terminal 3.
^ An open in the YEL /RED wire.
^ An open in the YEL wire.

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.

Test Description
The numbers below refer to step numbers on the diagnostic table.
2. This determines the passenger deployment loop voltage difference measured by the Inflatable Restraint Sensing and Diagnostic Module (SDM).
3. The test checks for proper contact and/or corrosion of the yellow connector.
10. This test isolates the malfunction to one side of the Inflatable Restraint IP module yellow connector. This is done by substituting the known good resistance of the load tool and then observing if the malfunction is still present.
12. This test checks for proper contact and/or corrosion of the SDM connector.
17. This test determines whether the malfunction is in the YEL/RED wire.
19. This test determines whether the malfunction is in the YEL wire.