B1B55 1st Passanger Seat Belt Sensor Circuit High

B1B55 Code - this DTC sets when the ORC detects the seat belt switch circuits have become shorted to voltage for more than 2.5 seconds. This DTC transition from active to stored when the module sees recovery from the shorted to voltage condition for greater than five seconds.

B1B55


Possible causes B1B55 Code

  • Passanger seat belt switch signal circuit shorted to voltage
  • Passanger seat belt switch ground circuit shorted to voltage
  • Passanger seat belt switch signal circuit open
  • Passanger seat belt switch ground circuit open
  • Passanger seat belt switch
  • Occupant Restraint Controller (ORC)

Diagnostic test B1B55 code


Step 1. Verify active DTC
Make sure the battery is fully charged. Turn the ignition on, with the scan tool read all ORC DTCs.

Does the scan tool display active B1B55 1st Row Passanger Seat Belt Sensor Circuit High?

Yes, go to step 2.

Step 2. Check the Passanger seat belt switch signal circuit for a short to voltage
Turn the ignition off, disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury. Disconnect the Passanger seat belt buckle tensioner harness connector containing the seat belt switch circuits. Disconnect the ORC harness connector, connect the SRS load tool adapter to the ORC harness connectors. Turn the ignition on, then reconnect the 12-volt battery and wait two minute before proceeding. Failure to follow these instructions may result in possible serious or fatal injury. Measure the voltage of the Passanger seat belt switch signal circuit between the appropriate terminal of the SRS load tool adapter and ground.

Is there any voltage present on the circuit?

Yes, turn the ignition off, disconnect the 12-volt battery and wait two minutes before proceeding. Failre to follow these instructions may result in possible serious or fatal injury. Repir the Passanger seat belt switch signal circuit for a short to voltage.
No, go to step 3.

Step 3. Check the Passanger seat belt switch ground circuit for a short to voltage
Measure the voltage of the Passanger seat belt switch ground circuit between the appropriate terminal of the SRS load tool adapter and ground.

Is there any voltage present on the circuit?

Yes, turn the ignition off, disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury. Repair or replace the Passanger seat belt switch ground circuit for a short to voltage.
No, go to step 4.

Step 4. Check the Passanger seat belt switch signal circuit for an open
Turn the ignition  off, disconnect the 12-volt battery and wait two minutes before proceeding. Failure too follow these instruction may result in possible serious or fatal injury. Measure the resistance of the Passanger seat belt switch signal circuit between the Passanger seat belt buckle tensioner connector and the appropriate terminal of the SRS load too adapter.

Is the resistance below 1.0 Ohm?

Yes, go to step 5.
No, repair or replace Passanger seat belt switch signal circuit for an open or high resistance.

Step 5. Check the Passanger seat belt switch ground circuit for an open
Measure the resistance of the Passanger seat belt switch ground circuit between the Passanger seat belt buckle tensioner connector and the appropriate terminal of the SRS load tool adapter.

Is the resistance below 1.0 Ohms?

Yes, go to step 6.
No, repair or replace the Passanger seat belt switch ground circuit for an open or high resistance.

Step 6. Check operation of the 1st Row Passanger Seat Belt switch
Turn the ignition off, diconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury. Replace the Passanger seat belt switch. Reconnect the vehicle body harness to the switch. Turn the ignition on, then reconnect 12-volt battery and wait  two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury. Connect the scan tool to DLC, use the most current software available. Use the scan tool and erase all codes in the ORC Module. Turn the ignition off, and wait 15 seconds before returning the ignition On. Wait on minute and read active codes.

Did the active B1B55 Code return?

Yes, if the Occupant Restraint Controller (ORC) is dropped at any time, it must be replaced. Failure to take the proper precautions can result in accidential airbag deployment. Failure to follow these instructions may result in possible serious or fatal injury. Turn the ignition off, disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instruction may result in possible serious or fatal injury. Replace the ORC Module, perform the Airbag system verification.

No, repair is complete.

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