Test Notes

Normal Operation

NOTES:
- The air bag module connector, air bag diagnostic monitor harness connector, and the air bag sliding contact connector have metal spring clips that act as shorting bars. These shorting bars are built into the plastic hardshell connectors. The shorting bars are designed to short Circuit 614 (GY/O) and 615 (GY/W) 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 module.
- The air bag sliding contact shorting bar may be removed to measure the air bag sliding contact resistance. Likewise, the shorting bar(s) in the air bag diagnostic monitor harness connector may be removed by removing the black spacer (locking wedge) from the connector. Use extreme caution when reinstalling the shorting bars to make sure they are installed correctly. While the ignition switch is in the RUN position, the air bag diagnostic monitor runs periodic checks on the resistance of the driver and passenger air bag module circuits.

Normal resistance from Pin C232-2, Circuit 614 (GY/O) (driver air bag module feed) to Pin C232-3, Circuit 615 (GY/W), (driver air bag module return) is between 1.4 ohms and 2.0 ohms. This resistance total results from the sum of the components in the circuit: the air bag module (approximately 1 ohm) and the air bag sliding contact (0.20 ohm to 0.35 ohm per winding, 2 windings total) plus a small amount of resistance due to the wire itself, crimps, etc.

If the resistance across these two pins is less than 1 ohm, the air bag diagnostic monitor will interpret this as a low resistance and the air bag diagnostic monitor will store in memory the Diagnostic Trouble Code (DTC) B1934 and flash a Lamp Fault Code (LFC) 34 on the air bag indicator.

If the low resistance is later repaired or otherwise rises into the normal range, a DTC B1934 will be stored in memory.

Possible Causes
Low resistance across Pin C232-2, Circuit 614 (GY/O) and Pin C232-3, Circuit 615 (GY/W) can be caused by:
- a poorly mated air bag connector, air bag diagnostic monitor harness connector, or air bag sliding contact connector not pushing the shorting bars back into their fully retracted position.
- a damaged or worn shorting bar causing a short in Circuits 614 (GY/O) and 615 (GY/W).
- a short in the air bag sliding contact windings or harness wires between Circuits 614 (GY/O) and 615 (GY/W).
- a short circuit or low resistance in the driver air bag module. Do not attempt a direct resistance measurement of the air bag module. Follow the diagnostic procedure to determine if the air bag module resistance is lower than normal.