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.
Determine possible failure area (front passenger's seat heater, others):
Determine possible failure area (front passenger's seat heater, others)
?1.
Turn the vehicle to the OFF (LOCK) mode.
?2.
Disconnect the following connector.
Front passenger's seat cushion heater 4P connector
?3.
Turn the vehicle to the ON mode.
?4.
Clear the DTCs with the HDS.
?5.
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
Go to step 4.
3.
Shorted wire check (+B HEATER(AS) line):
Shorted wire check (+B HEATER(AS) line)
?1.
Turn the vehicle to the OFF (LOCK) mode.
?2.
Disconnect the following connector.
Front seat heater control unit 14P connector
?3.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode Front seat heater control unit 14P connector: disconnected Front passenger's seat cushion heater 4P connector: disconnected
