T-TT-0622-20

Service Bulletin Details

Public Details for: T-TT-0622-20

Tt: some 2021 model year tacoma vehicles equipped with dual-zone automatic climate control without the seat heater option may have dtc B14C0 and B14C1 (right/left front seat heater circuit) stored in the air conditioning amplifier.


- 2021 -

Models from 2021
2021 TOYOTA TACOMA 
Tech Tip T-TT-0622-20
September 10, 2020
Subject
Market
DTC B14C0, B14C1 Present on Vehicles without Seat
Heaters
USA
Service Category
Section
Vehicle Interior
Seat
Applicability
2021 Tacoma
APPLICABLE VEHICLES
2021
Tacoma
CONDITION
Some 2021 model year Tacoma vehicles equipped with Dual-Zone Automatic Climate Control without
the Seat Heater Option may have DTC B14C0 and B14C1 (Right/Left Front Seat Heater Circuit)
stored in the Air Conditioning Amplifier.
RECOMMENDATIONS
DTC B14C0 and B14C1 are designed to indicate if there is a problem with the seat heater circuit. The
software logic in the Air Conditioning Amplifier may result in these DTCs present on vehicles which are
not equipped with seat heaters. Use the procedure below to determine if troubleshooting is
necessary.
Check for seat heater switches (located below the radio).
Confirm if switches are present:
Yes – Troubleshoot DTC per RM:
 SEAT: SEAT HEATER SYSTEM: B14C0; Front Right Seat Heat Sensor Circuit; 2016 2021 MY Tacoma [08/2015 ]
 SEAT: SEAT HEATER SYSTEM: B14C1; Front Left Seat Heat Sensor Circuit; 2020 2021 MY Tacoma [09/2019 ]
No – No Further Diagnosis or Repair Required. This vehicle does not have seat heaters and
these DTCs do not indicate a concern with the vehicle.
Expires on
Ver. 2.12 01/01/2020 T
09/10/2021
© 2020, Toyota Motor Sales, USA
Page 1 of 2
Tech Tip T-TT-0622-20
September 10, 2020
Subject
Market
DTC B14C0, B14C1 Present on Vehicles without Seat
Heaters
USA
Applicability
LINK REFERENCES
1.
2.
SEAT: SEAT HEATER SYSTEM: B14C0; Front Right Seat Heat Sensor Circuit; 2016 - 2021
MY Tacoma [08/2015 - ???????]
SEAT: SEAT HEATER SYSTEM: B14C1; Front Left Seat Heat Sensor Circuit; 2020 - 2021 MY
Tacoma [09/2019 - ???????]
Expires on
Ver. 2.12 01/01/2020 T
09/10/2021
© 2020, Toyota Motor Sales, USA
Page 2 of 2

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