Problem Symptoms Table
HINT:
Use the table below to help determine the cause of the problem symptom. 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.
Seat heater system
SEAT HEATER SYSTEM
| Symptom | Suspected area | See |
|---|---|---|
| Both front seat heaters do not warm up | 1. IG1 Relay | - |
| 2. P-IG Fuse | SEAT HEATER SYSTEM | |
| 3. SEAT HTR Fuse | SEAT HEATER SYSTEM | |
| 4. Front seat heater switch | INSPECTION | |
| 5. Wire harness | - | |
| Front seat cushion heater LH does not warm up | 1. Front seat heater switch | INSPECTION |
| 2. Seat heater control sub-assembly LH | ON-VEHICLE INSPECTION | |
| 3. Wire harness | - | |
| 4. Front seat cushion heater LH | INSPECTION | |
| Front seatback heater LH does not warm up | 1. Front seat heater switch | INSPECTION |
| 2. Seat heater control sub-assembly | ON-VEHICLE INSPECTION | |
| 3. Wire harness | - | |
| 4. Front seatback heater | INSPECTION | |
| Front seat cushion heater RH does not warm up | 1. Front seat heater switch | INSPECTION |
| 2. Seat heater control sub-assembly RH | ON-VEHICLE INSPECTION | |
| 3. Wire harness | - | |
| 4. Front seat cushion heater RH | INSPECTION | |
| Front seatback heater RH does not warm up | 1. Front seat heater switch | INSPECTION |
| 2. Seat heater control sub-assembly RH | ON-VEHICLE INSPECTION | |
| 3. Wire harness | - | |
| 4. Front seatback heater RH | INSPECTION |
HINT:
The seat heater system is part of the large-scale multiplex communication system. This system features shared communication wiring that reduces the wiring complexity of the communication lines. The first step in any repair is to confirm the proper operation of the communication system. Proceed with troubleshooting after the communication has been verified (see MULTIPLEX COMMUNICATION SYSTEM ).