DTC B14C1: Front Left Seat Heat Sensor Circuit [03/2017 - ]: Procedure

1. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [03/2017 - ]

   Body Electrical > Air Conditioner > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  2

1. Check for DTCs.

   Refer to DTC CHECK / CLEAR [03/2017 - ]

   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 [03/2017 - 04/2020]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [04/2020 - 05/2023]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [05/2023 - ] 

Result: 

C 

See step  5

Result: 

B 

See step  3

1. Remove the front seat cushion heater assembly LH.

   Refer to REMOVAL [03/2017 - 05/2023] , or refer to REMOVAL [05/2023 - ]

2. Inspect the front seat cushion heater assembly LH.

   Refer to INSPECTION [03/2017 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE FRONT SEAT CUSHION HEATER ASSEMBLY LH. Refer to  REMOVAL [03/2017 - 05/2023]  , or refer to  REMOVAL [05/2023 - ] 

Result: 

OK 

See step  4

1. Disconnect the P56 and P57 air conditioning amplifier assembly connectors.
2. Disconnect the w5 front seat cushion heater assembly LH connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   P56-17 (TSL) - w5-4	Always	Below 1 Ω
   P56-17 (TSL) or w5-4 - Other terminals and body ground	Always	10 kΩ or higher
   P57-8 (SG-5) - w5-5	Always	Below 1 Ω
   P57-8 (SG-5) or w5-5 - 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 [03/2017 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Remove the front seat cushion pad with cover LH.

   Refer to REMOVAL [03/2017 - 05/2023] , or refer to REMOVAL [05/2023 - ]

2. Inspect the front seat cushion pad with cover LH.

   Refer to INSPECTION [03/2017 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE FRONT SEAT CUSHION PAD WITH COVER LH. Refer to  REMOVAL [03/2017 - 05/2023]  , or refer to  REMOVAL [05/2023 - ] 

Result: 

OK 

See step  6

1. Disconnect the P56 and P57 air conditioning amplifier assembly connectors.
2. Disconnect the w5 front seat cushion pad with cover LH connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   P56-17 (TSL) - w5-4	Always	Below 1 Ω
   P56-17 (TSL) or w5-4 - Other terminals and body ground	Always	10 kΩ or higher
   P57-8 (SG-5) - w5-5	Always	Below 1 Ω
   P57-8 (SG-5) or w5-5 - 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 [03/2017 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR