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 MANUALSTOYOTA2019SEQUOIA LIMITED, 4WDREPAIR AND DIAGNOSISRESTRAINTSRESTRAINTS CONTROL SYSTEMSPRE-COLLISION SYSTEM - DIAGNOSTIC CODES & CIRCUIT TESTS
2019 Toyota Sequoia Limited, 4WD
Pre-Collision System - Diagnostic Codes & Circuit Tests
2019 Toyota Sequoia Limited, 4WDSECTION Pre-Collision System - Diagnostic Codes & Circuit Tests
- Pre-Collision System
- Vehicle Control History [08/2017 - ]
- DTC C1A02: Vehicle Information Not Obtained [08/2017 - ]
- DTC C1A10: Front Radar Sensor [08/2017 - 08/2019]
- DTC C1A10: Front Radar Sensor [08/2019 - ]
- DTC C1A11: Front Radar Sensor Incorrect Axial Gap [08/2017 - 08/2019]
- DTC C1A11: Front Radar Sensor Incorrect Axial Gap [08/2019 - ]
- DTC C1A14: Front Radar Sensor Beam Axis Not Adjusted [08/2017 - ]
- DTC C1A46: Yaw Rate Sensor [08/2017 - ]
- DTC C1A47: Steering Angle Sensor [08/2017 - ]
- DTC C1A4A: Skid Control Buzzer Circuit [08/2017 - 08/2019]
- DTC C1A4A: Skid Control Buzzer Circuit [08/2019 - ]
- DTC C1A4B: Stop Light Relay Circuit [08/2017 - 08/2019]
- DTC C1A4B: Stop Light Relay Circuit [08/2019 - ]
- DTC C1A50: Brake System Malfunction [08/2017 - 08/2019]
- DTC C1A50: Brake System Malfunction [08/2019 - ]
- DTC C1A63: Other System Malfunction [08/2017 - 08/2018]
- DTC C1A63: Other System Malfunction [08/2018 - 08/2019]
- DTC C1A63: Other System Malfunction [08/2019 - ]
- DTC C1A69: Brake Control Signal Mismatch [08/2017 - 08/2019]
- DTC C1A69: Brake Control Signal Mismatch [08/2019 - ]
- DTC C1AA0: Front Camera Module Circuit [08/2017 - 08/2019]
- DTC C1AA0: Front Camera Module Circuit [08/2019 - ]
- DTC C1AA8: Front Camera Module Incorrect Axial Gap [08/2017 - ]
- DTC C1AA9: Front Camera Module Beam Axis Not Adjusted [08/2017 - ]
- DTC C1AAE: Heater Circuit [08/2017 - 08/2019]
- DTC C1AAE: Heater Circuit [08/2019 - ]
- DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0125: Lost Communication with Yaw Rate Sensor Module; DTC U0126: Lost Communication with Steering Angle Sensor Module; DTC U0129: Lost Communication with Brake System Control Module [08/2017 - 08/2019]
- DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0125: Lost Communication with Yaw Rate Sensor Module; DTC U0126: Lost Communication with Steering Angle Sensor Module; DTC U0129: Lost Communication with Brake System Control Module [08/2019 - ]
- DTC U0235: Lost Communication with Cruise Control Front Distance Range Sensor [08/2017 - 08/2019]
- DTC U0235: Lost Communication with Cruise Control Front Distance Range Sensor [08/2019 - ]
- DTC U023A: Lost Communication With Image Processing Module "A" [08/2017 - 08/2019]
- DTC U023A: Lost Communication With Image Processing Module "A" [08/2019 - ]
- DTC U1002: Lost Communication with Gateway Module [08/2017 - 08/2019]
- DTC U1002: Lost Communication with Gateway Module [08/2019 - ]
- ECU Power Source Circuit [08/2017 - 08/2019]
- ECU Power Source Circuit [08/2019 - ]
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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.