DTC Troubleshooting: 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 Description
DTC
B1C62 Passenger's heater current abnormal high
  

1.
Problem verification:

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:

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
     
     
     
3.
DTC check 2:

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
     
     
     
4.
Shorted wire check (AS H/SEAT LO RLY COM line):

Shorted wire check (AS H/SEAT LO RLY COM line)
?1.
Disconnect the following connector.
Front seat heater control unit 24P connector

?2.
Check for continuity 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 continuity?

     
YES
     
     
     
Repair a short in the wire.?
     
NO