Supplemental Inflatable Restraint (SIR)

Diagnostic Chart:

Wiring Diagram:

CIRCUIT DESCRIPTION
When the ignition switch is first turned On, battery voltage is applied to the AIR BAG warning lamp and to the "Ignition 1" input terminal A7. The ADM responds by flashing the AIR BAG warning lamp seven times alternating between the primary and redundant lamp drivers. The Sensing & Diagnostics Module (SDM) monitors the redundant lamp driver output by comparing the output state at "SIR Indicator" terminal A9 to the microprocessor commanded state. When "Ignition 1" is above a specified value and the output state does not match the commanded state of the redundant lamp driver for 400 milliseconds, DTC 62 is set.

DTC WILL SET WHEN:
"Ignition 1" voltage is above a specified value and the output state at the "SIR Indicator" terminal A9 does not match the commanded state of the primary lamp driver for 400 milliseconds. This test is run every 100 milliseconds during "Continuous Monitoring" tests.

ACTION TAKEN:
SDM attempts to turns On the AIR BAG warning lamp using the redundant lamp driver and sets a diagnostic trouble code.

DTC WILL CLEAR WHEN:
The ignition switch is turned Off.

DIAGNOSTIC AIDS:
It is important that the ADM mounting surface is free of any dirt or foreign material and that the fasteners are properly torqued to ensure a good "Redundant Indicator Ground."

Was the "SIR Diagnostic System Check" performed?

When measurements are requested in this chart, use (Saturn Tool) SA 91114NE DVM with correct terminal adapter from SA 9206Z.