Chart B Warning Lamp Comes On Steady
Diagnostic Chart:
Diagnostic Chart:
Diagnostic Chart:
Wiring Diagram:
CIRCUIT DESCRIPTION
When the ignition switch is first turned "ON," "Ignition 1" voltage is applied from the "GAUGES" fuse to "Redundant Indicator Ignition 1" terminal "B2", and to the "AIR BAG" warning lamp 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 7 times. If " Ignition 1" is outside of the normal operating voltage range, the "AIR BAG" warning lamp will come "ON" solid with no DTCs set.
When the engine is being cranked, "Ignition 1" voltage is applied from the "CRANK" fuse 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 "AIR BAG" warning lamp being "ON" during cranking.
After cranking, the DERM will flash the "AIR BAG1, warning lamp 6 times.
TABLE TEST DESCRIPTION
Number(s) below refer to step number(s) on the diagnostic table.
1. The "SIR DIAGNOSTIC SYSTEM CHECK" should be the starting point for all diagnosis. SIR Diagnostic System Check
2. An open "AIR BAG" fuse would cause the "AIR BAG" warning lamp to come "ON" steady.
3. A disconnected DERM harness connector will cause the warning lamp to come "ON" steady via the shorting bar from terminal "A1" to terminal "B1."
9. This test checks for an open in the ground circuitry to the DERM.
11. This test checks for a open circuit in the 1139 circuit.
14. This test checks for a short from the "Crank" input circuit to B+.
15. This step instructs you to repair the short to B+ in CKT 806.