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)ACCESSORIES & EQUIPMENTDRIVERS ASSISTANCE SYSTEMS - ADASDYNAMIC RADAR CRUISE CONTROL SYSTEM (EXCEPT HV) - DIAGNOSTIC CODES & CIRCUIT TESTSDYNAMIC RADAR CRUISE CONTROL SYSTEM (FOR GASOLINE MODEL)DTC U0300-51: INTERNAL CONTROL MODULE SOFTWARE INCOMPATIBILITY NOT PROGRAMMED [09/2020 - ]DESCRIPTION
2025 Toyota Highlander XLE, FWD
DTC U0300-51: Internal Control Module Software Incompatibility Not Programmed [09/2020 - ]: Description
2025 Toyota Highlander XLE, FWDSECTION Description
If the forward recognition camera cannot verify the vehicle information sent from the ECM, the forward recognition camera stores DTC U0300-51.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | DTC Output from |
|---|---|---|---|---|---|
| U0300-51 | Internal Control Module Software Incompatibility Not Programmed | When the ignition switch is ON for 3 seconds, the vehicle information sent from the ECM cannot be verified by the forward recognition camera for approximately 3 seconds or more. | Pre-collision system | Does not come on | Radar Cruise 2 |
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.