Chart C Air Bag Warning Lamp Does Not Comes ON

CIRCUIT DESCRIPTION

When the ignition switch is first turned to RUN," "Ignition 1" voltage is applied from the "IGN 1" fuse to the "AIR BAG" warning lamp which is connected to "SIR Indicator" terminal "7." The "AIR BAG" fuse applies system voltage to the "Ignition 1" input, terminal "10." The SDM responds by flashing the "AIR BAG" warning lamp seven 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.

CHART TEST DESCRIPTION

Numbers below refer to circled numbers on the diagnostic chart.

1. This test determines whether the malfunction is in the SDM circuitry or in the instrument cluster power feed circuitry.

2. This test determines whether voltage is present in the warning lamp circuit.

3. This test determines if the malfunction is in the instrument cluster.

4. This test isolates an open in the warning lamp circuitry.

5. This test isolates CKT 358 and checks for a short in CKT 358 to B+.

5. This test checks whether power is available to the instrument cluster power feed circuit.

6. This test checks for a short from the instrument cluster power feed circuit to ground.

7. This test determines whether the short to ground is due to a short in the wiring.

8. This test determines whether the malfunction is due to an open power feed circuit from the "IGN 1" fuse or an open power feed to the "IGN 1" fuse.