Test U: LFC 33/DTC B1933 - Passenger Air Bag Circuit Resistance High

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

U1-U3:

U3-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 could be caused by:
- wiring, terminals, or connectors.
- an open circuit or high resistance in the passenger air bag module.
- a faulted RCM.