Toyota Highlander Service Manual: Ignition system (2AZ-FE)

Ignition

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On-vehicle inspection

NOTICE: In this section, the terms "cold" and "hot" refer to the temperature of the coils. "Cold"means approximately -10 C (14 F) to 50 C (122 F). "Hot" means approximately 50 C (122 F) to 100 C ...

More about Toyota Highlander:

Checking and replacing fuses
If any of the electrical components do not operate, a fuse may have blown. If this happens, check and replace the fuses as necessary. Vehicles without a smart key system: turn the engine switch to the "lock" position. Vehicles with a smart key system: turn the engine switch off. ...