Note
If the auxiliary battery voltage is low, the seat heater system may not operate. When "Operation of Electrical Items Restricted." is displayed on the multi-information display in the combination meter assembly, inspect the auxiliary battery, referring to On-vehicle Inspection for the charging system.
If the auxiliary battery voltage is low, the seat heater system may not operate. When "Operation of Electrical Items Restricted." is not displayed on the multi-information display in the combination meter assembly, check the Data List item "Battery Control Count (Body ECU)".
Tech Tips
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 does not operate for driver side and front passenger side seat | Refreshing seat switch | - |
| Air conditioning amplifier assembly | - | |
| Wire harness or connector | - | |
| Driver side seat heater does not operate | Refreshing seat switch | |
| Separate type front seat cushion cover (front right seat)*1 | - | |
| Separate type front seatback cover (front right seat)*1 | - | |
| Front seat cushion pad with cover RH*2 | - | |
| Front seatback pad with cover RH*2 | - | |
| Seat heater control sub-assembly RH | - | |
| Air conditioning amplifier assembly | - | |
| Wire harness or connector | - | |
| Front passenger side seat heater does not operate | Refreshing seat switch | |
| Separate type front seat cushion cover (front left seat)*1 | - | |
| Separate type front seatback cover (front left seat)*1 | - | |
| Front seat cushion pad with cover LH*2 | - | |
| Front seatback pad with cover LH*2 | - | |
| Seat heater control sub-assembly LH | - | |
| Air conditioning amplifier assembly | - | |
| Wire harness or connector | - |
*1: for Standard Seat Type
*2: for Sports Seat Type