What are the Possible Causes of the DTC B1BB4 Mitsubishi?
NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
Faulty Passenger Air Bag Disable Switch
Passenger Air Bag Disable Switch harness is open or shorted
Passenger Air Bag Disable Switch circuit poor electrical connection
Faulty Occupant Restraint Controller (ORC)
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How to Fix the DTC B1BB4 Mitsubishi?
Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
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What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B1BB4 Mitsubishi code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.
What are Code Possible Symptoms?
Air Bag Warning Light ON
Code B1BB4 Mitsubishi Description
When the ignition is on, the Passenger Airbag MUX Switch Sense circuit supplies a 3 to 10 ms pulse every 100 ms across the On or Off switch resister to the Passenger Airbag MUX switch return circuit. Once the code is active, the Occupant Restraint Controller (ORC) will disable the indicator for the duration of the ignition cycle. The code will set if the ORC senses constant voltage over approximately 4.0 volts on the Passenger Airbag MUX Switch circuits.
B1BB4 Mitsubishi Code - Passenger Air Bag Disable Switch Circuit High
Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service
Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed,
it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.
Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.
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