Problem Symptoms Table
WARNING: This page is about a different car, the 2011 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
HINT:
Use the table below, with suspected areas listed in numerical order, to determine the cause of the problem. Inspect and repair or replace parts as necessary according to the steps on the following pages.
SEAT VENTILATION/HEATING SYSTEM
| Symptom | Suspected area | Refer to |
|---|---|---|
| Seat heaters do not operate (without seat ventilator). | 1. S-HTR fuse | - |
| 2. Seat heater switch | Refer to INSPECTION | |
| 3. Front seat cushion heater assembly | Refer to INSPECTION | |
| 4. Front seatback heater assembly | Refer to INSPECTION | |
| 5. Seat heater circuit | Refer to ON-VEHICLE INSPECTION | |
| 6. Seat heater controller | - | |
| Seat heaters do not operate (with seat ventilator). | 1. S-HTR fuse | - |
| 2. Front seat cushion heater assembly | Refer to INSPECTION | |
| 3. Front seatback heater assembly | Refer to INSPECTION | |
| 4. Air conditioning amplifier (Seat ventilation/heating switch circuit) (for driver side) | Refer to DTC B1463/63: Driver Side Seat Heater Temperature Sensor Circuit | |
| 5. Air conditioning amplifier (Seat ventilation/heating switch circuit) (for front passenger side) | Refer to DTC B1464/64: Front Passenger Side Seat Heater Temperature Sensor Circuit | |
| 6. Seat heater controller | - | |
| Temperature of seat heater cannot be adjusted (without seat ventilator). | Seat heater switch | Refer to INSPECTION |
| Temperature of seat heater cannot be adjusted (with seat ventilator). | 1. Seat ventilator/heater switch (Heater control housing sub-assembly) (for driver side) | Refer to DTC B1463/63: Driver Side Seat Heater Temperature Sensor Circuit |
| 2. Seat ventilator/heater switch (Heater control housing sub-assembly) (for front passenger side) | Refer to DTC B1464/64: Front Passenger Side Seat Heater Temperature Sensor Circuit | |
| 3. Wire harness or connector | - | |
| Seat ventilators do not operate. | 1. S-HTR fuse | - |
| 2. Seat ventilator circuit | Refer to ON-VEHICLE INSPECTION | |
| 3. Air conditioning amplifier (Seat ventilation/heating switch circuit) | Refer to Seat Blower Control Circuit | |
| 4. Seat ventilator | - | |
| Intensity of seat ventilator cannot be adjusted. | 1. Seat ventilator/heater switch (Heater control housing sub-assembly) | Refer to Seat Blower Control Circuit |
| 2. Wire harness or connector | - |