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)ELECTRICALSTARTERSTOP AND START SYSTEM - DIAGNOSTIC CODES (1 OF 3)STOP AND START SYSTEMDTC P0604-44: INTERNAL CONTROL MODULE RANDOM ACCESS MEMORY (RAM) ERROR DATA MEMORY FAILURE [11/2023 - ]CAUTION / NOTICE / HINT
2025 Toyota Highlander XLE, FWD
Caution / Notice / Hint
2025 Toyota Highlander XLE, FWDSECTION Caution / Notice / Hint
NOTE:
- After turning ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.
- To prevent the key from being locked in the vehicle, make sure to enter e-latch inspection mode and enable the manual release handle before disconnecting the cable from the negative (-) battery terminal.
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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.