Part 2 of 2

Test C: Inflatable Restraint Warning Lamp Does Not Come ON (Part 2 Of 2):

Supplemental Inflatable Restraint (SIR):

OPERATION:
When the ignition switch is first turned "ON," "Ignition 1" voltage is applied from the "IGN" fuse 1D to "Redundant Indicator Ignition 1," terminal "B2" and to the "INFLATABLE RESTRAINT" warning lamp which is connected to "SIR Indicator," terminal "B1." The "AIR BAG" fuse 1C applies system voltage to the "Ignition 1" Inputs, terminals "A9" and "A10." The DERM responds by flashing the "INFLATABLE RESTRAINT" warning lamp 7 times.

When the engine is being cranked, "Ignition 1" voltage is applied from the "CRANK" fuse 1A to the DERM at the "Crank" input. The DERM responds by grounding the "SIR Indicator" output until "Ignition 1" voltage is removed from the "Crank" input. This results in the "INFLATABLE RESTRAINT" warning lamp being "ON" during cranking.

After cranking, the DERM will flash the "INFLATABLE RESTRAINT" warning lamp 6 times.

POSSIBLE CAUSES:
Test Description: Number(S) below refer to circled number(S) on the diagnostic chart.
7. This test checks whether power is available to the Instrument Cluster power feed circuit.
8. This test checks for a short from the instrument cluster power feed circuit to ground.
9. This test determines whether the short to ground is due to a short in the wiring.
10. This test determines whether the malfunction is due to an open power feed circuit from the "IGN" fuse 1D to the instrument cluster or an open power feed to the "IGN" fuse 1D.