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

Engine control system

...

On-vehicle inspection

1. CHECK THROTTLE BODY (a) Listen to the throttle control motor operating sounds.  Turn the ignition switch ON.  When pressing the accelerator pedal position sensor lever, listen t ...

More about Toyota Highlander:

Horn system
LOCATION INSPECTION 1. INSPECT RELAY (HORN) (a) Remove the HORN relay from the engine room J/B. (b) Measure the HORN relay resistance. Standard: 2. INSPECT HIGH PITCHED HORN ASSY (a) Check operation of the horn. Standard: If the result is not as specified, replace the horn ...