Test Notes

Normal Operation
The air bag diagnostic monitor measures the resistance between Pin C1-16, Circuit 613 (DB/W) and Pin C1-3, Circuit 649 (BK/O), ground. If the air bag diagnostic monitor measures a difference of more than 2.0 ohms between Pin C1-16 and Pin C1-3, it will flash DTC 21 on the air bag indicator.

It is important to note that Circuit 613 (DB/W) is grounded to the side of the safing sensor case and the case of the safing sensor is grounded to the vehicle in the LH kick panel. A good ground connection, at both the case and the vehicle body, is important to proper circuit operation.

Possible Causes
High resistance at Pin C1-16, Circuit 613 (DB/W) to ground can be caused by:

1. A poor connection due to loose mounting or dirt at the LH kick panel safing sensor mounting surface.

2. An open or damaged wire in Circuit 613 (DB/W) from Pin C1-16 of the air bag diagnostic monitor connector to the LH kick panel safing sensor.

3. An open circuit inside the LH kick panel safing sensor.