Problem Symptoms Table [12/2019 - ]

2025 Toyota Highlander XLE, 4WDSECTION Problem Symptoms Table [12/2019 - ]

HINT: 

  • Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
  • Inspect the fuses and relays related to this system before inspecting the suspected areas below.
Symptom Suspected Area Link
Does not switch to AWD Disconnect system function check Refer to CALIBRATION [12/2019 - ] 
Brake control system Refer to VEHICLE CONTROL HISTORY [12/2019 - ]
Engine control system Refer to VEHICLE CONTROL HISTORY [12/2019 - ]
4WD ECU assembly Refer to TERMINALS OF ECU [12/2019 - ] 
Electro magnetic control coupling sub-assembly Refer to DISASSEMBLY [12/2019 - ]
Tight-corner braking phenomenon* 4WD ECU assembly Refer to TERMINALS OF ECU [12/2019 - ] 
Steering sensor circuit Refer to VEHICLE CONTROL HISTORY [12/2019 - ]
Brake control system Refer to VEHICLE CONTROL HISTORY [12/2019 - ]
Electro magnetic control coupling sub-assembly Refer to DISASSEMBLY [12/2019 - ]
AWD warning message remains displayed AWD warning circuit Refer to AWD Warning Remains ON [12/2019 - 11/2023] , or refer to AWD Warning Remains ON [11/2023 - ]
AWD warning message is not displayed AWD warning circuit Refer to AWD Warning does not Come ON [12/2019 - ]
Multi-terrain select switch (crawl control switch assembly) does not operate AWD control switch circuit Refer to AWD Control Switch Circuit [12/2019 - 10/2022] , or refer to AWD Control Switch Circuit [10/2022 - ]

HINT: 

*: Tight corner braking phenomenon: a phenomenon in which an AWD vehicle may lurch and decelerate due to a rotational speed difference between the front and rear wheels, such as during low-speed cornering in AWD mode.

RENDER: 1.0x

NO RELATED

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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.