Toyota Highlander Service Manual: Location

Toyota Highlander Service Manual / Seat / Seat heater system / Location

LOCATION

PROBLEM SYMPTOMS TABLE

Symptom	Suspected Area
Driver's and passenger's seat heaters do not warm up	SEAT HTR fuse IG1 fuse Seat heater relay Wire harness
Only driver's seat heater does not warm up	Seat heater (front) switch LH Front seat cushion Cover LH (seat cushion heater assy LH) Front seatback cover LH (seatback heater assy LH) Wire harness
Only passenger's seat heater does not warm up	Seat heater (front) switch RH Front seat cushion Cover RH (seat cushion heater assy RH) Front seatback cover RH (seatback heater assy RH) Wire harness

Inspection

1. INSPECT SEAT HEATER (FRONT) SWITCH LH (a) Check the resistance between the terminals when the switch is operated. Standard: If the result is not as specified, replace the seat heater sw ...

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Symptom simulation
HINT: The most difficult case in troubleshooting is when no problem symptoms occur. In such cases, a thorough customer problem analysis must be carried out. A simulation of the same or similar conditions and environment in which the problem occurred in the customer's vehicle should be carried ...