DTC B1FBB

DTC B1FBB  : Left rear main heater switch failure (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
   B1FBB Left rear main heater switch failure (rear seat)

   Is DTC B1FBB indicated?

   YES 

   Replace the rear seat heater control unit .

   NO 

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