Test Notes

NORMAL OPERATION
The air bag diagnostic monitor measures the resistance across Pin C2-10, Circuit 31S (BK/O) and Pin C2-11, Circuit 8 (W/BL) every time the ignition switch is turned to RUN. Normal resistance across these circuits is between 1.5 ohm and 2.0 ohms. This resistance comes from the air bag itself (approximately 1.0 ohm) and the air bag sliding contacts windings (approximately 0.25 to 0.5 ohm per winding, two windings in all). If the resistance across these two circuits exceeds 4.0 ohms, the air bag diagnostic monitor will flash Code 32.

NOTE: The connectors for the driver side air bag module and the air bag sliding contact have metal spring clips that act as shorting bars. These shorting bars are built into the plastic hard-shell connectors. The shorting bars are designed to short Circuits 29 and 31 together when the connectors are not mated. DO NOT attempt to remove the air bag shorting bar and measure the resistance of the air bag.

The air bag sliding contact shorting bar may be removed to measure the air bag sliding contact resistance. Use extreme care when reinstalling the shorting bar to ensure it is installed correctly.

POSSIBLE CAUSES
Excessive resistance across Pins C2-10 and C2-11 can be caused by:

1. A poor connection where the air bag sliding contact connects into the main wiring harness. The air bag sliding contact connector at the base of the steering column may have excessive resistance between the male and female terminals in the connector or across the terminal crimps.

2. An open circuit or high resistance in the air bag sliding contact windings inside the air bag sliding contact assembly.

3. An open circuit or high resistance in the wiring harness in either Circuit 8 (W/BL), 29 (O) or Circuit 31S (BK/O).

4. An open circuit or high resistance in the driver side air bag module. DO NOT attempt a direct resistance measurement of the driver side air bag module. Follow the diagnostic procedures to determine if the driver air bag resistance is higher than normal.