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 MANUALSTOYOTA2018SIENNA LIMITED, AWDREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTCOLLISION/AVOIDANCEINTUITIVE PARKING ASSIST SYSTEM - DIAGNOSTIC CODES & CIRCUIT TESTS
2018 Toyota Sienna Limited, AWD
Intuitive Parking Assist System - Diagnostic Codes & Circuit Tests
2018 Toyota Sienna Limited, AWDSECTION Intuitive Parking Assist System - Diagnostic Codes & Circuit Tests
- Intuitive Parking Assist System
- Diagnostic Codes
- DTC C1AE1: Front Left Sensor Malfunction [12/2015 - ]
- DTC C1AE4: Front Right Sensor Malfunction [12/2015 - ]
- DTC C1AE6: Rear Left Sensor Malfunction [12/2015 - ]
- DTC C1AE7: Rear Left Center Sensor Malfunction [12/2015 - ]
- DTC C1AE8: Rear Right Center Sensor Malfunction [12/2015 - ]
- DTC C1AE9: Rear Right Sensor Malfunction [12/2015 - ]
- DTC C1AEC: Front Sensor Communication Malfunction [12/2015 - 11/2017]
- DTC C1AEC: Front Sensor Communication Malfunction [11/2017 - ]
- DTC C1AED: Rear Sensor Communication Malfunction [12/2015 - 11/2017]
- DTC C1AED: Rear Sensor Communication Malfunction [11/2017 - ]
- DTC C1AEF: Shift Position Information [12/2015 - ]
- DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0101: Lost Communication with TCM; DTC U0142: Lost Communication with Body Control Module "B"; DTC U0155: Lost Communication with Instrument Panel Cluster Control Module (Combination Meter) [11/2017 - ]
- DTC U0101: Lost Communication with TCM; DTC U0155: Lost Communication with Instrument Panel Cluster Control Module (Combination Meter) [12/2015 - 11/2017]
- Circuit Tests
- Clearance Sonar Main Switch Circuit [12/2015 - 11/2017]
- Clearance Sonar Main Switch Circuit [11/2017 - ]
- Clearance Warning Buzzer Circuit [12/2015 - 11/2017]
- Clearance Warning Buzzer Circuit [11/2017 - ]
- Clearance Warning ECU Power Source Circuit [12/2015 - 11/2017]
- Clearance Warning ECU Power Source Circuit [11/2017 - ]
- Symptom Tests
- Diagnostic Codes
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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.