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:

Precaution
(b) HINTS ON OPERATIONS 1 Looks Always wear a clean uniform. Hat and safety shoes must be worn 2 Vehicle protection
Prepare a grille cover, fender cover, seat cover and floor mat before starting the operation. ...