DTC B14C3: Rear Left Seat Heat Sensor Circuit [11/2020 - ]: Procedure

1. Clear the DTCs.

   Body Electrical > Air Conditioner > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  2

1. Check for DTCs.

   Body Electrical > Air Conditioner > Trouble Codes 

   Result

   Result	Proceed to
   B14C3 is not output	A
   B14C3 is output	B

Result: 

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2020 - ] 

Result: 

B 

See step  3

Pre-procedure1

• Disconnect the D78 air conditioning amplifier assembly connector.
• Disconnect the M1 seatback heater assembly LH connector.

• Measure the resistance according to the value(s) in the table below.

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  D78-4 (TFAL) - M1-2	Always	Below 1 Ω	Ω
  D78-4 (TFAL) or M1-2 - Body ground	Always	10 kΩ or higher	kΩ
  D78-19 (SG) - M1-3	Always	Below 1 Ω	Ω
  D78-19 (SG) or M1-3 - Body ground	Always	10 kΩ or higher	kΩ

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  4

Refer to INSPECTION [11/2020 - ]

Result

Result: 

NG 

REPLACE SEAT CUSHION HEATER ASSEMBLY LH. Refer to  REMOVAL [11/2020 - ] 

Result: 

OK 

See step  5

Refer to INSPECTION [11/2020 - ]

Result

Result: 

OK 

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to  REMOVAL [11/2020 - ] 

Result: 

NG 

REPAIR SEAT HEATER ASSEMBLY. Refer to  REMOVAL [11/2020 - ]