Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA2013SEQUOIA LIMITED, 5.7L ENG VIN WREPAIR AND DIAGNOSISHEATING, VENTILATION & A/C (HVAC)HVAC CONTROL SYSTEMSAIR CONDITIONING SYSTEM (DIAGNOSTIC CODES & CIRCUIT TESTS)
2013 Toyota Sequoia Limited, 5.7L Eng VIN W
Air Conditioning System (Diagnostic Codes & Circuit Tests)
2013 Toyota Sequoia Limited, 5.7L Eng VIN WSECTION Air Conditioning System (Diagnostic Codes & Circuit Tests)
- Air Conditioning System
- DTC B1411/11: Room Temperature Sensor Circuit
- DTC B1412/12: Ambient Temperature Sensor Circuit
- DTC B1413/13: Evaporator Temperature Sensor Circuit
- DTC B1417/17: Rear Evaporator Temperature Sensor Circuit
- DTC B1419/19: Rear Room Temperature Sensor Circuit
- DTC B1421/21: Solar Sensor Circuit (Passenger Side)
- DTC B1422/22: Compressor Lock Sensor Circuit
- DTC B1423/23: Pressure Sensor Circuit
- DTC B1424/24: Solar Sensor Circuit (Driver Side)
- DTC B1441/41: Air Mix Damper Control Servo Motor Circuit (Passenger Side)
- DTC B1442/42: Air Inlet Damper Control Servo Motor Circuit
- DTC B1443/43: Air Outlet Damper Control Servo Motor Circuit
- DTC B1445/45: Passenger Side Cool Air Bypass Damper Control
- DTC B1446/46: Air Mix Damper Control Servo Motor Circuit (Driver Side)
- DTC B1447/47: Rear Air Mix Damper Control Servo Motor Circuit
- DTC B1449/49: Rear Air Outlet Damper Control Servo Motor Circuit
- DTC B1497/97: BUS IC Communication Malfunction
- DTC B1499/99: Communication Malfunction (Engine and Meter ECU)
- Symptom Tests
- Circuit Tests
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.