B1036

Diagnostic Chart (Part 1 Of 2):

Diagnostic Chart (Part 2 Of 2):

Wiring Diagram:

CIRCUIT DESCRIPTION
When you first turn the ignition switch to the RUN position, the inflatable restraint Sensing and Diagnostic Module (SDM) performs tests to diagnose critical malfunctions within itself. Upon passing these tests the following circuits are measured to verify that they are within their respective normal voltage ranges:
^ IGNITION 1 voltage
^ 23 VLR
^ Deployment loop voltages

The SDM then proceeds to Continuous Monitoring. The SDM contains a resistor network connected to 5 volts, ground, and to the SDM front end discriminating sensor signal terminal 9. The 1.0 K ohm resistor located in the inflatable restraint front end discriminating sensor is parallel to the normally open switch and provides a parallel path to ground. This causes a specified percentage of voltage to appear at the SDM front end discriminating sensor signal input. The SDM monitors this voltage to detect shorts to ground or a closed discriminating sensor.

CONDITIONS FOR SETTING THE DTC
^ The SDM is configured for an inflatable restraint front end discriminating sensor.
^ The voltage at front end discriminating sensor signal terminal 9 is more than 5.0 volts for 500 milliseconds.

The CONTINUOUS MONITORING test inspects for this DTC. This test occurs when IGNITION 1 voltage is within the normal operating voltage range.

ACTION TAKEN WHEN THE DTC SETS
The SDM turns ON the AIR BAG warning lamp.

CONDITIONS FOR CLEARING THE DTC
^ Current DTC - The voltage at front end discriminating sensor signal terminal 9 is less than 3.2 volts for 500 milliseconds.
^ History DTC
- Issue a scan tool CLEAR CODES command.
- After 250 malfunction free ignition cycles have occurred.

DIAGNOSTIC AIDS
A broken or chafed wire in the inflatable restraint front end discriminating sensor circuit may cause an intermittent condition. Inspect CKT 1834 and CKT 1751 carefully for cutting or chafing.

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

TEST DESCRIPTION
The numbers below refer to the step numbers on the diagnostic table:
2. This test inspects for proper contact or corrosion of the yellow 2-way connector.
7. This test inspects for a malfunctioning discriminating sensor.
8. This test inspects for an open in CKT 1751.
11. This test isolates the open in CKT 1751 to one side of C 110.
14. This test inspects for proper contact or corrosion of the inflatable restraint Sensing and Diagnostic Module (SDM) connector.
19. This test inspects for an open in CKT 1834.
22. This test isolates the open in CKT 1834 to one side of C 110.
25. This test inspects for a short to voltage in CKT 1834.