DTC B1C56 (Ventilated Seat Control Unit)

WARNING: This page is about a different car, the 2022 Honda Accord, 2021 Honda Accord, 2020 Honda Accord, 2019 Honda Accord, and 2018 Honda Accord. However, it is still accessible from the selected car via links, so may be relevant.

DTC B1C56 : Driver's Heater Thermistor Circuit Short

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A .

DTC Description	DTC
B1C56 Driver's heater thermistor circuit short

DTC (Ventilated Seat Control Unit)

Problem verification

-1. Clear the DTCs with the HDS.

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

-3. Turn the driver's seat heater switch ON.

-4. Wait for at least 90 seconds.

-5. Check for DTCs with the HDS.

DTC Description	DTC
B1C56 Driver's heater thermistor circuit short

Is DTC B1C56 indicated?

YES

Go to step 2.

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

DTC check

-1. Turn the vehicle to the OFF (LOCK) mode.

-2. Disconnect the following connector.

Driver's seat heater connector A (4P)

-3. Clear the DTCs with the HDS.

-4. Turn the vehicle to the OFF (LOCK) mode and then the ON mode.

-5. Turn the driver's seat heater switch ON.

-6. Check for DTCs with the HDS.

DTC Description	DTC
B1C56 Driver's heater thermistor circuit short

Is DTC B1C56 indicated?

YES

Repair a short in the TH+ DR wire.

Faulty driver's seat heater thermistor; replace the driver's seat cushion heater .