Chart F Indicator Flashes 7-9 Times Then Flashes DTC 12

3��PDiagnostic Chart:

Wiring Diagram:

CIRCUIT DESCRIPTION
When the ignition switch is first turned "ON," Ignition 1 voltage is applied from the GAGES fuse to "Redundant Indicator Ignition 1," terminal "B2" and to the "AIR BAG" warning tamp which is connected to "SIR Indicator," terminal "B1." The AIR BAG fuse applies system voltage to the "Ignition 1" inputs, terminals "A9" and "A10." The DERM responds by flashing the "AIR BAG" warning lamp times.

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

After cranking, the DERM will flash the "AIR BAG" warning lamp 6 times.

TEST DESCRIPTION
Number(s) below refer to circled number(s) on the diagnostic chart.
1. This test checks for a short to ground on the "Diagnostic Request" circuit. Since grounding of the "Diagnostic Request" circuit enables diagnostics, i.e. flashes DTC 12, this ground must be supplied by the DERM or the wiring.