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 XLE, FWDREPAIR AND DIAGNOSIS (SINGLE PAGE)RESTRAINTSAIR BAG, SRSOCCUPANT CLASSIFICATION SYSTEM - DIAGNOSTIC CODES & SYMPTOM TESTSOCCUPANT CLASSIFICATION SYSTEMDTC U0125: LOST COMMUNICATION WITH MULTI-AXIS ACCELERATION SENSOR MODULE; DTC U0129: LOST COMMUNICATION WITH BRAKE SYSTEM CONTROL MODULE [12/2019 - 11/2023]DESCRIPTION
2025 Toyota Highlander XLE, FWD
DTC U0125: Lost Communication with Multi-axis Acceleration Sensor Module; DTC U0129: Lost Communication with Brake System Control Module [12/2019 - 11/2023]: Description
2025 Toyota Highlander XLE, FWDSECTION Description
The occupant detection ECU sends/receives signals to/from each ECU via CAN communication.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| U0125 | Lost Communication with Multi-axis Acceleration Sensor Module | CAN communication error between occupant detection ECU and acceleration sensor (CAN communication system malfunction) | CAN communication system |
| U0129 | Lost Communication with Brake System Control Module |
|
CAN communication system |
- *1: for Gasoline Model
- *2: for HV Model
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.