Test Notes

Normal Operation
The diagnostic monitor measures the resistance across pin 8 and pin 9 every time the ignition switch is turned to the ON position. Normal resistance across these circuits is between 0.9 ohms and 1.1 ohms with a passenger air bag installed. Pin 7 of the diagnostic monitor should be connected to ground. Connecting pin 7 to ground programs the diagnostic monitor to ignore high resistance on the passenger air bag circuits. If the resistance across these two circuits exceeds 4.0 ohms and pin 7 is not grounded, the diagnostic monitor will flash a code 33 on the air bag lamp.

Possible Causes
A high resistance or open in the air bag circuit can be caused by the following:
1. Pin 7 not connected to ground.