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HOMESERVICE MANUALSHONDA2018RIDGELINE BLACK EDITIONREPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMESEATSSEATS - TESTING & TROUBLESHOOTINGTROUBLESHOOTINGDTC B1FB4
2018 Honda Ridgeline Black Edition

DTC B1FB4

2018 Honda Ridgeline Black EditionSECTION DTC B1FB4

DTC B1FB4  : Right rear heater not heating (rear seat)

DTC Description DTC
B1FB4 Right rear heater not heating (rear seat)  

DTC (Rear Seat Heater Control Unit)

NOTE: 

  • If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A .
  • The seat heater control unit does not turn on the seat heater until the seat core temperature is 85°ees or less. Make sure the seat core temperature is below 85°ees before troubleshooting.
  1. Problem verification

    -1. Clear the DTCs with the HDS.

    -2. Turn the vehicle to the OFF (LOCK) mode and then the ON mode.

    -3. Check for DTCs with the HDS.

    DTC Description DTC
    B1FB4 Right rear heater not heating (rear seat)  

    Is DTC B1FB4 indicated?

    YES 

    Go to step 2.

    NO 

    Intermittent failure, the system is OK at this time. Check for loose or poor connections.

  2. DTC check

    -1. Check for DTCs with the HDS.

    DTC Description DTC
    B1FA2 Right rear heater thermistor circuit open (rear seat)  
    B1FA3 Right rear heater thermistor circuit short (rear seat)  
    B1FAD Right rear heater current abnormal high (rear seat)  
    B1FAE Right rear heater current abnormal low (rear seat)  

    Are DTCs B1FA2, B1FA3, B1FAD, and/or B1FAE indicated?

    YES 

    Go to DTC B1FA2 troubleshooting .

    YES 

    Go to DTC B1FA3 troubleshooting .

    YES 

    Go to DTC B1FAD troubleshooting .

    YES 

    Go to DTC B1FAE troubleshooting .

    NO 

    Replace the right rear seat-back heater .

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.