DTC 33

Pinpoint Test 15: LFC 33/DTC B1933 - Passenger Air Bag Circuit Resistance High

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.

WARNING: The air bag diagnostic tool is for restraint system repair only. Remove from vehicle prior to road use. Failure to remove could result in injury and possible violation of vehicle safety standards.

NOTE: If a seat equipped with a seat-mounted side air bag and/or a safety belt pretensioner (if equipped) system is being serviced, the air bag system must be deactivated using the appropriate deactivation procedure in this section.

NOTE: Restraint system diagnostic tools MUST be installed under the seats in the side air bag and safety belt pretensioner to floor connectors.

NOTE: Diagnostics or repairs are not to be performed on a side air bag system and/or a safety belt pretensioner (if equipped) system with the seats in the vehicle. Prior to attempting to diagnose/repair the side air bag system and/or safety belt pretensioner (it equipped) system the seats must be removed from the vehicle and the restraint system diagnostic tools must be installed in the side air bag and the safety belt pretensioner (if equipped) connectors at the floor connectors. The restraint system diagnostic tools must be removed prior to operating the vehicle over the road.

NOTE:
Diagnostics may be performed on seat systems other than the side air bag or the safety belt pretensioner (if equipped) system (lumbar, climate controlled, heated, power seat track) with the seat installed in the vehicle as long as the restraint system diagnostic tools are installed under the seats in the side air bag and safety belt pretensioner to floor connectors.

NOTE: After diagnosing/repairing a seat system, the restraint system diagnostic tools must be removed before operating the vehicle over the road.

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TEST DESCRIPTION