Toyota Yaris: Seat Heater System / Problem Symptoms Table

Toyota Yaris XP210 (2020-2025) Reapir and Service Manual / Vehicle Interior / Seat / Seat Heater System / Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

HINT:

Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.

Seat Heater System

Symptom	Suspected Area	Link
Seat heater for front left seat does not operate	Seat heater switch LH
	Terminals of ECU
	Wire harness or connector	-
	Front seat cushion heater assembly LH
	Front seatback heater assembly LH
	Power distribution box assembly
Seat heater for front right seat does not operate	Seat heater switch RH
	Terminals of ECU
	Wire harness or connector	-
	Front seat cushion heater assembly RH
	Front seatback heater assembly RH
	Power distribution box assembly

Operation Check

OPERATION CHECK CHECK FRONT SEAT HEATER (a) for LH Side: (1) Turn the ignition switch to ON. (2) Set the seat heater switch LH to "HI" or "LO" and check that the seat heater operates...

Terminals Of Ecu

TERMINALS OF ECU CHECK POWER DISTRIBUTION BOX ASSEMBLY (a) Remove the power distribution box assembly. Click here (b) Reconnect the power distribution box assembly connectors...

Other information:

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