'99 ranger air bag code 33, help
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'99 ranger air bag code 33, help
I have a "99 ranger that the air bag light blinks code 33. can anybody tell me what I can do to correct this. I think the code means pass air bag resistance high. thanks
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Airbag Lamp Code 33 — Passenger Air Bag Circuit Resistance High
Airbag Lamp Code 33 — 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 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.
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 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.
There is essentially only one pinpoint test for the circuit, and it looks fairly straightforward:
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?
Yes
REPAIR the circuit(s) as necessary.
No
INSTALL a new RCM.
NOTE: Zero the multimeter prior to taking the measurements.
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?
Yes
REPAIR the circuit(s) as necessary.
No
INSTALL a new RCM.
NOTE: Zero the multimeter prior to taking the measurements.
WARNING: To avoid accidental deployment and possible personal injury, the backup power supply must be depleted before repairing or replacing any front or side air bag supplemental restraint system (SRS) components and before servicing, replacing, adjusting or striking components near the front or side air bag sensors, such as doors, instrument panel, console, door latches, strikers, seats and hood latches.
To deplete the backup power supply energy, disconnect the battery ground cable and wait at least one minute. Be sure to disconnect auxiliary batteries and power supplies (if equipped).
Last edited by Rockledge; Aug 27, 2005 at 08:39 AM.
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