Honda HR-V Owners & Service Manuals

Honda HR-V: DTC B1C55, B1C57

NOTE : Refer to the DTC code shown on the display, and then inspect the connectors and terminals based on the instructions in the table below.

Seat Heater System - Diagnostics

DTC (Front 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 - Refer to: Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication and DTC Checks.
  • The seat heater control unit does not turn on the seat heater until the seat core temperature is 85 degrees or less. Make sure the seat core temperature is below 85 degrees before troubleshooting.

1. Problem verification:

  1. Clear the DTCs with the HDS.

Clear DTCs

  1. Turn the vehicle to the OFF (LOCK) mode and then the ON mode.
  2. Wait for at least 90 seconds.
  3. Check for DTCs with the HDS.

Seat Heater System - Diagnostics

Is DTC B1C55 or B1C57 indicated?

YES

Go to step 2.

NO

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

2. Seat heater check 1:

  1. Turn the vehicle to the OFF (LOCK) mode.
  2. Disconnect the following connector.

Front seat heater control unit 14P connector

  1. Check for continuity between the terminals as specified in the table while in the vehicle OFF (LOCK) mode.

Seat Heater System - Diagnostics

Seat Heater System - Diagnostics

Is resistance value within the range?

YES

Replace the front seat heater control unit.

NO

Go to step 3.

3. Seat heater check 2:

  1. Disconnect the following connectors.

Driver's seat cushion heater connector A (4P)

Front passenger's seat cushion heater connector A (4P)

  1. Check for continuity between the terminals as specified in the table while in the vehicle OFF (LOCK) mode.

Seat Heater System - Diagnostics

Seat Heater System - Diagnostics

Seat Heater System - Diagnostics

Is resistance value within the range?

YES

Replace the front seat heater control unit.

NO

Go to step 4.

4. Open wire check (FR DR H/SEAT TH+, FR AS H/SEAT TH+ line):

  1. Connect terminals A and B with a jumper wire.

Seat Heater System - Diagnostics

Seat Heater System - Diagnostics

  1. Disconnect the following connector.

Front seat heater control unit connector (14P)

  1. Check for continuity between the terminals as specified in the table while in the vehicle OFF (LOCK) mode.

Seat Heater System - Diagnostics

Is there continuity?

YES

Repair an open or high resistance in the FR DR H/SEAT TH- or FR AS H/SEAT TH- wire.

NO

Repair an open or high resistance in the FR DR H/SEAT TH+ or FR AS H/SEAT TH+ wire.

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