DTC B1C63

DTC B1C63  : Front passenger's heater current abnormal low

DTC (Front Seat Heater Control Unit)

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
   B1C63 Front passenger's heater current abnormal low

   Is DTC B1C63 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. Turn the vehicle to the OFF (LOCK) mode.

   - 2. Disconnect the following connector.

   Front passenger's seat heater connector A (5P) - Refer to: Seat Heater Replacement (Seat Heaters), or Seat Heater Replacement - Ventilated Seats (Ventilated Seats), or Seat Heater Replacement (2017 2018 2019 2020)

   - 3. Connect terminals A and B with a jumper wire.

   Terminal A	Front passenger's seat heater connector A (5P) No. 4 (RED)
   Terminal B	Body ground

   Courtesy of HONDA, U.S.A., INC.

   - 4. Turn the vehicle to the ON mode.

   - 5. Clear the DTCs with the HDS.

   - 6. Check for DTCs with the HDS.

   DTC Description	DTC
   B1C63 Front passenger's heater current abnormal low

   Is DTC B1C63 indicated?

   YES 

   Repair an open or high resistance in the wire.

   NO 

   Go to step 3.

3. Seat heater check

   -1. Measure the resistance between test points 1 and 2, refer to the following table.

   Test condition	Vehicle OFF (LOCK) mode. Front passenger's seat heater connector A (5P): disconnected
   Test circuit	AS HEATER, GND
   Test point 1	Front passenger's seat heater connector A (5P) No. 4
   Test point 2	Front passenger's seat heater connector A (5P) No. 1

   Courtesy of HONDA, U.S.A., INC.

   Is there more than 6.1 Ω?

   YES 

   Replace the front passenger's seat cushion heater - Refer to: Seat Heater Replacement (2017 2018 2019 2020), or Seat Heater Replacement (Seat Heaters), or Seat Heater Replacement - Ventilated Seats (Ventilated Seats) .

   NO 

   Go to step 4.

4. Open wire check (BACK HEAT line)

   -1. Disconnect the following connector.

   Front passenger's seat heater connector B (2P) - Refer to: Seat Heater Replacement (Seat Heaters), or Seat Heater Replacement - Ventilated Seats (Ventilated Seats), or Seat Heater Replacement (2017 2018 2019 2020)

   - 2. Connect terminals A and B with a jumper wire.

   Terminal A	Front passenger's seat heater connector A (5P) No. 5 (WHT)
   Terminal B	Body ground

   Courtesy of HONDA, U.S.A., INC.

   - 3. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode. Front passenger's seat heater connector B (2P): disconnected
   Test circuit	BACK HEAT
   Test point 1	Front passenger's seat heater connector B (2P) No. 1 (WHT)
   Test point 2	Body ground

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   Replace the front passenger's seat-back heater - Refer to: Seat Heater Replacement (Seat Heaters), or Seat Heater Replacement - Ventilated Seats (Ventilated Seats), or Seat Heater Replacement (2017 2018 2019 2020) .

   NO 

   Repair an open or high resistance in the wire.