Note
If the battery voltage is low, the seat heater system may not operate due to operation of battery load control, 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 |
|---|---|---|
| Front seat heater does not operate for driver side and front passenger side seat | Refreshing seat switch | - |
| Air conditioning amplifier assembly | - | |
| S/HTR F/R relay | - | |
| Wire harness or connector | - | |
| Seat heater for front right seat does not operate | Refer to the "Seat Heater for Front Right Seat does not Operate". | |
| Seat heater for front left seat does not operate | Refer to the "Seat Heater for Front Left Seat does not Operate". | |
| Rear seat heater does not operate for LH side and RH side seat | Air conditioning system (for Automatic air conditioning system) | |
| IG1 NO. 4 relay | - | |
| Wire harness or connector | - | |
| Seat heater switch (Cooler control switch assembly) | - | |
| Seat heater for rear right seat does not operate | Rear seat cushion heater assembly (RH) | |
| Rear seatback heater assembly RH | ||
| Rear seat cushion heater assembly (LH) | ||
| Rear seatback heater assembly LH | ||
| Wire harness or connector | - | |
| Seat heater switch (Cooler control switch assembly) | - | |
| Seat heater for rear left seat does not operate | Rear seat cushion heater assembly (LH) | |
| Rear seatback heater assembly LH | ||
| Wire harness or connector | - | |
| Seat heater switch (Cooler control switch assembly) | - |