Test Notes

Normal Operation
The air bag Electronic Crash Sensor (ECS) module monitors the resistance of the passenger air bag ignitor by measuring the resistance between Pins 14 and 28. If the ECS detects high resistance between these pins, it will store a Diagnostic Trouble Code (DTC) B1933 in memory and flash a Lamp Fault Code (LFC) 33 (or higher priority code if one exists) on the air bag indicator.

Possible Causes
Passenger air bag high resistance could be caused by:
^ a poor connection or corrosion in the passenger air bag module circuits.
^ an open circuit or high resistance in the wiring harness.
^ an open circuit or high resistance in the passenger air bag module.