code 33 can only be caused by either (1) a bad airbag module, (2) a bad RCM, or (3) a problem in the circuit.
Airbag Lamp Code 33 — Passenger Air Bag Circuit Resistance High
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 on the air bag indicator.
A passenger air bag high resistance could be caused by:
- a poor connection or corrosion in the passenger air bag module circuit.
- 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.
CHECK THE PASSENGER AIR BAG MODULE CIRCUIT
1. Disconnect the harness connector from the RCM.
NOTE: By disconnecting the RCM connector, circuit 607 (LB/OG) and circuit 616 (PK/BK) of the RCM connector are shorted together with a shorting bar. Do not remove the shorting bar.
2. Disconnect the harness connector from the passenger side airbag module. At the airbag module connector, measure the resistance between passenger air bag circuit 607 (LB/OG), harness side, and passenger air bag circuit 616 (PK/BK), harness side.
Is the resistance greater than 0.5 ohm?
REPAIR the circuit(s) as necessary.
INSTALL a new RCM.
NOTE: Zero the multimeter prior to taking the measurements.