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:

    Toyota Yaris XP210 (2020-2025) Owner's Manual: Curtain Air Bags


    The curtain air bags are mounted in the front and rear window pillars, and the roof edge along both sides. When the air bag crash sensors detect a side impact of greater than moderate force, the curtain air bag inflates quickly and helps to reduce injury mainly to the rear outboard passenger’s head caused by directly hitting interior parts such as a door or window...

    Toyota Yaris XP210 (2020-2025) Reapir and Service Manual: On-vehicle Inspection


    ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT STOP LIGHT SWITCH ASSEMBLY (a) Disconnect the stop light switch assembly connector. (b) Measure the voltage and resistance on the wire harness side connector according to the value(s) in the table below. Standard Voltage: Tester Connection Condition Specified Condition A63-7 (B) - A63-2 (GND) Always 11 to 14 V A63-6 (B) - A63-2 (GND) Ignition switch on (IG) 11 to 14 V Standard Resistance: Tester Connection Condition Specified Condition A63-2 (GND) - Body ground Always Below 1 Ω If the result is not as specified, repair or replace the wire harness or connector...

    Categories

    Front Seat Belt Pretensioners

    The front seat belt pretensioners are designed to deploy in moderate or severe frontal, near frontal collisions.

    In addition, the pretensioners operate when a side collision or a rollover accident is detected. The pretensioners operate differently depending on what types of air bags are equipped. For more details about the seat belt pretensioner operation, refer to the SRS Air Bag Deployment Criteria.

    read more

     
    Copyright © 2025 www.toyaris4.com