DTC B1C62

DTC B1C62  : Passenger's heater current abnormal high

NOTE: 

• If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A .
• The front seat heater control unit does not turn on the front seat heater until the seat core temperature is 185°F (85°C) or less. Make sure the seat core temperature is below 185°F (85°C) before troubleshooting.

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
   B1C62 Passenger's heater current abnormal high

   Is DTC B1C62 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

   -1. Disconnect the following connector.

   Front passenger's seat heater connector B (2P)

   -2. Turn the vehicle to the ON mode.

   -3. Clear the DTCs with the HDS.

   -4. Check for DTCs with the HDS.

   DTC Description	DTC
   B1C62 Passenger's heater current abnormal high

   Is DTC B1C62 indicated?

   YES 

   Go to step 3.

   NO 

   Replace the front passenger's seat-back heater .

3. DTC check 2

   -1. Disconnect the following connector.

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

   -2. Turn the vehicle to the ON mode.

   -3. Clear the DTCs with the HDS.

   -4. Check for DTCs with the HDS.

   DTC Description	DTC
   B1C62 Passenger's heater current abnormal high

   Is DTC B1C62 indicated?

   YES 

   Go to step 4.

   NO 

   Replace the front passenger's seat cushion heater .

4. Shorted wire check (AS_H/SEAT_LO_RLY_COM line)

   -1. Disconnect the following connector.

   Front seat heater control unit 24P connector

   -2. Measure the resistance between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode Front seat heater control unit 24P connector: disconnected Front passenger's seat heater connector A (4P): disconnected
   Test point 1	Front seat heater control unit 24P connector No. 3

   Test point 2

   Body ground

   Is there 1.0 MΩ or more?

   YES 

   Replace the front seat heater control unit .

   NO 

   Repair a short in the wire.