DTC B14C3: Rear Left Seat Heat Sensor Circuit [10/2017 - ]: Procedure

1. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [10/2017 - ]

   Body Electrical > Air Conditioner > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  2

1. Check for DTCs.

   Refer to DTC CHECK / CLEAR [10/2017 - ]

   Body Electrical > Air Conditioner > Trouble Codes 

   OK

   DTC B14C3 is not output.

   Result

   Result	Proceed to
   OK	A
   NG (w/ Rear Power Seat)	B
   NG (w/o Rear Power Seat)	C

Result: 

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2017 - 09/2018]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - 09/2019]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2019 - 10/2020]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2020 - 11/2021]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - 10/2022]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 10/2023]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2023 - ] 

Result: 

C 

See step  5

Result: 

B 

See step  3

1. Remove the separate type rear seat cushion cover LH.

   Refer to REMOVAL [10/2017 - 09/2018] , or refer to REMOVAL [09/2018 - 10/2020] , or refer to REMOVAL [10/2020 - 11/2021] , or refer to REMOVAL [11/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

2. Inspect the separate type rear seat cushion cover LH.

   Refer to INSPECTION [10/2017 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE SEPARATE TYPE REAR SEAT CUSHION COVER LH. Refer to  REMOVAL [10/2017 - 09/2018]  , or refer to  REMOVAL [09/2018 - 10/2020]  , or refer to  REMOVAL [10/2020 - 11/2021]  , or refer to  REMOVAL [11/2021 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023]  , or refer to  REMOVAL [10/2023 - ] 

Result: 

OK 

See step  4

1. Disconnect the G63 air conditioning amplifier assembly connector.
2. Disconnect the T9 separate type rear seat cushion cover LH connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G63-19 (TFAL) - T9-3	Always	Below 1 Ω
   G63-19 (TFAL) or T9-3 - Other terminals and body ground	Always	10 kΩ or higher
   G63-9 (SG-6) - T9-4	Always	Below 1 Ω
   G63-9 (SG-6) or T9-4 - Other terminals and body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to  REMOVAL [10/2017 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Remove the bench type rear seat cushion cover.

   Refer to REMOVAL [10/2017 - 09/2018] , or refer to REMOVAL [09/2018 - 10/2020] , or refer to REMOVAL [10/2020 - 11/2021] , or refer to REMOVAL [11/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

2. Inspect the bench type rear seat cushion cover.

   Refer to INSPECTION [10/2017 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE BENCH TYPE REAR SEAT CUSHION COVER. Refer to  REMOVAL [10/2017 - 09/2018]  , or refer to  REMOVAL [09/2018 - 10/2020]  , or refer to  REMOVAL [10/2020 - 11/2021]  , or refer to  REMOVAL [11/2021 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023]  , or refer to  REMOVAL [10/2023 - ] 

Result: 

OK 

See step  6

1. Disconnect the G63 air conditioning amplifier assembly connector.
2. Disconnect the R62 bench type rear seat cushion cover connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G63-19 (TFAL) - R62-9	Always	Below 1 Ω
   G63-19 (TFAL) or R62-9 - Other terminals and body ground	Always	10 kΩ or higher
   G63-9 (SG-6) - R62-3	Always	Below 1 Ω
   G63-9 (SG-6) or R62-3 - Other terminals and body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to  REMOVAL [10/2017 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR