Test U

PINPOINT TEST U: LFC 33/DTC B1933 - PASSENGER AIR BAG CIRCUIT RESISTANCE HIGH

Test U1:

Test U2-U3:

Test U4-U5:

Normal Operation
The restraints control module (RCM) monitors the resistance of the passenger air bag ignitor by measuring the resistance between pins 6 and 7. If the RCM 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
A passenger air bag high resistance can 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.
- an RCM internal concern.