Test Notes

Air Bag Diagnostic Monitor Pin 21 Not Connected to Ground

NORMAL OPERATION
The air bag diagnostic monitor measures the resistance between Pin 21 (Circuit 618, P/LG) and Pin 3 (Circuit 57, BK, diagnostic monitor reference ground). If the air bag diagnostic monitor measures a difference of more than 2.0 ohms between Pin 21 and Pin 3, it will flash out diagnostic trouble code 45.

Note that Circuit 618 (P/LG) is spliced to a wire which is attached to the RH primary crash sensor case. In addition, the case is grounded to the vehicle. If the splice is open, diagnostic trouble code 45 will flash.

POSSIBLE CAUSES
High resistance on Pin 21 (Circuit 618, P/LG) to ground can be caused by:

1. A poor connection due to loose mounting or dirt at the RH primary crash sensor mounting location.

2. A poor splice.

3. A poor connection at Pin 21 of the air bag diagnostic monitor connector.