Toyota Highlander Service Manual: Power steering system

Power steering

...

Precaution

1. HANDLING PRECAUTIONS FOR STEERING SYSTEM (a) Care must be taken when replacing parts. Incorrect replacement could affect the performance of the steering system and result in a driving hazard. ...

More about Toyota Highlander:

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 (212 F). 1. INSPECT IGNITION COIL ASSY (WITH IGNITER) AND PERFORM SPARK TEST (a) Check for DTCs. ...