With UB3

Circuit Description
When the ignition switch is first turned to RUN, the CHIME Fuse applies battery voltage to the AIR BAG warning lamp that is connected to SIR Indicator, terminal 7. The AIR BAG Fuse applies battery voltage to the Ignition Positive Voltage input, terminal 10. The Inflatable Restraint Sensing and Diagnostic Module (SDM) responds by flashing the AIR BAG warning lamp seven times.

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

Test Description
The numbers below refer to the step numbers on the diagnostic table:
2. This test determines whether the malfunction is in the Inflatable Restraint Sensing and Diagnostic Module (SDM) circuitry or in the remote indicator bank power feed circuitry.
3. This test determines whether voltage is present in the warning lamp circuit.
4. This test isolates circuit 358 (BRN) and checks for a short in circuit 358 (BRN) to voltage.
6. This test determines if the malfunction is in the remote indicator bank connector.
8. This test isolates an open in the warning lamp circuitry.
11. This test checks whether power is available to the remote indicator bank power feed circuit.
12. This test checks for a short from the remote indicator bank power feed circuit to ground.
13. This test determines whether the short to ground is due to a short in the wiring or internal to the remote indicator bank.
17. This test determines if the malfunction is in the remote indicator bank connector.
19. This test determines whether the malfunction is due to an open power feed circuit from the CHIME Fuse.