Toyota Yaris: 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.
| 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) Reapir and Service Manual: Installation
INSTALLATION CAUTION / NOTICE / HINT NOTICE: After performing the update ECU security key procedure, make sure to perform the initialization procedure for when the cable has been disconnected and reconnected to the negative (-) auxiliary battery terminal...
Toyota Yaris XP210 (2020-2025) Reapir and Service Manual: Disassembly
DISASSEMBLY CAUTION / NOTICE / HINT NOTICE: Do not drop the power steering ECU assembly, strike it with tools or subject it to impacts. If the power steering ECU assembly is subjected to an impact, replace it with a new one. Do not pull the wire harness...
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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.
