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 MANUALSTOYOTA2025HIGHLANDER HYBRID XLEREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTDRIVERS ASSISTANCE SYSTEMS - ADASLANE CONTROL SYSTEM - DIAGNOSTICS - INTRODUCTIONLANE CONTROL SYSTEMFAIL-SAFE CHART [12/2019 - 09/2020]FAIL-SAFE CHART [12/2019 - 09/2020]
2025 Toyota Highlander Hybrid XLE
Fail-Safe Chart [12/2019 - 09/2020]
2025 Toyota Highlander Hybrid XLESECTION Fail-Safe Chart [12/2019 - 09/2020]
- FAIL-SAFE FUNCTION
- When a malfunction occurs in the lane control system, a message will be displayed on the multi-information display and, depending on the malfunction, functions of the lane control system will be disabled.
Warning Message Cause Fail-safe Operation Conditions to Return to Normal Condition Lane Departure Alert Function Steering Assist Function Lane Centering Function Vehicle Sway Warning Function LTA Malfunction Visit Your Dealer*1
LDA Malfunction Visit Your Dealer*2Lane control system is malfunctioning
HINT:
Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ]X X X X After system returns to normal, ignition switch is turned off and then to ON or LTA/LDA main switch is turned off and then to on. Front Camera Unavailable Forward recognition camera temperature out of operating range X X X X Forward recognition camera temperature returns to normal Abnormal forward recognition camera voltage X X X X Forward recognition camera voltage returns to normal Forward recognition camera is temporarily unavailable (forward recognition camera recognition stopped) X X X X The conditions which prevent the forward recognition camera from performing recognition return to normal. Front Camera Unavailable See Owner's Manual - Area of windshield glass in front of forward recognition camera is dirty or fogged up
- Lens of forward recognition camera is dirty or fogged up
X X X X Forward recognition camera or area of windshield glass in front of forward recognition camera is cleaned LTA Unavailable*1
LDA Unavailable*2Sensor other than forward recognition camera sensor is temporarily unavailable
HINT:
Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ]X X X X Temporarily unavailable sensor becomes available *1: w/ Lane Centering Function*2: w/o Lane Centering Function X: Control is suspended
- When a malfunction occurs in the lane control system, a message will be displayed on the multi-information display and, depending on the malfunction, functions of the lane control system will be disabled.
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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.