Chart C - "Air Bag" Warning Lamp Does Not Comes "ON" Steady

Chart C "AIR BAG" Warning Lamp Does Not Comes "ON" Steady






Circuit Description
When the ignition switch is first turned "ON", "ignition 1" voltage is applied from the "MA01" meter fuse to the "AIR BAG" warning lamp which is connected to "Supplemental Restraint System (SRS) warning lamp", terminal "7". The "SRS" fuse apply system voltage to the "ignition 1" inputs, terminals "12". The SRS CONTROL UNIT responds by flashing the "AIR BAG" warning lamp seven times. If "ignition 1" voltage is more than 16 volts, the "AIR BAG" warning lamp will be still "OFF" solid with no DTCs set.

Step 1 - 2:

Step 3 - 8:

Step 9 - 10:

Chart Test Description
Number(s) below refer to step number(s) on the diagnostic chart:
1. This test decides whether power is available to SRS CONTROL UNIT warning lamp power feed circuit.
2. This test determines whether the voltage is present in the warning lamp circuit.
3. This test determines if the malfunction is in the instrument cluster.
4. This test checks for open in the warning lamp circuitry.
5. This test isolates the "SRS warning lamp" circuit and checks for a short in the "SRS warning lamp" circuit to B+.
8. This test checks for a short from the SRS CONTROL UNIT warning lamp power feed circuit to ground.
9. This test determines whether the short to ground is due to a short in the wiring.