DTC B14C1: Front Left Seat Heat Sensor Circuit [08/2021 - ]: 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 

   OK

   DTC B14C1 is not output.

   Result

   Result	Proceed to
   OK	A
   NG (for Standard Seat Type)	B
   NG (for Sports Seat Type)	C

Result: 

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ] 

Result: 

C 

See step  5

Result: 

B 

See step  3

1. Remove the front seat cushion heater assembly LH.

   Refer to REMOVAL [08/2021 - 09/2022] , or refer to REMOVAL [09/2022 - ]

2. Inspect the front seat cushion heater assembly LH.

   Refer to INSPECTION [06/2018 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE FRONT SEAT CUSHION HEATER ASSEMBLY LH. Refer to  REMOVAL [08/2021 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

Result: 

OK 

See step  4

1. Disconnect the G41 air conditioning amplifier assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G41-17 (TSL) - U39-4	Always	Below 1 Ω
   G41-17 (TSL) or U39-4 - Body ground	Always	10 kΩ or higher
   G41-9 (SG-6) - U39-5	Always	Below 1 Ω
   G41-9 (SG-6) or U39-5 - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to  REMOVAL [08/2020 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Remove the front seat cushion heater (front seat cushion pad with cover LH).

   Refer to REMOVAL [08/2021 - 09/2022] , or refer to REMOVAL [09/2022 - ]

2. Inspect the front seat cushion heater (front seat cushion pad with cover LH).

   Refer to INSPECTION [06/2018 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE FRONT SEAT CUSHION HEATER (FRONT SEAT CUSHION PAD WITH COVER LH). Refer to  REMOVAL [08/2021 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

Result: 

OK 

See step  6

1. Disconnect the G41 air conditioning amplifier assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G41-17 (TSL) - U39-4	Always	Below 1 Ω
   G41-17 (TSL) or U39-4 - Body ground	Always	10 kΩ or higher
   G41-9 (SG-6) - U39-5	Always	Below 1 Ω
   G41-9 (SG-6) or U39-5 - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to  REMOVAL [08/2020 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR