Note
If the battery voltage is low, the seat heater system may not operate. When "High Power Consumption / Partial Limit On AC/Heater Operation" is displayed on the multi-information display in the combination meter assembly, inspect the battery, referring to On-vehicle Inspection for the charging system.
Tech Tips
If the battery voltage is low, "Operation Limitation Control History Count (Level 1)" and "Operation Limitation Control History Count (Level 2) is counted.
for 8AR-FTS: Click here
for 3ZR-FAE: Click here
If the battery voltage is low, the seat heater system may not operate. Refer to Data List for power steering system.
for Manual Tilt and Manual Telescopic Steering Column: Click here
for Power Tilt and Power Telescopic Steering Column: Click here
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 | Harness and connector | - |
| Air conditioning control assembly | ||
| Air conditioning amplifier assembly | ||
| Driver side seat heater does not operate | Proceed to "Seat Heater for Front Left Seat does not Operate"*1 | |
| Proceed to "Seat Heater for Front Right Seat does not Operate"*2 | ||
| Front passenger side seat heater does not operate | Proceed to "Seat Heater for Front Right Seat does not Operate"*1 | |
| Proceed to "Seat Heater for Front Left Seat does not Operate"*2 | ||
| Rear seat LH heater does not operate*3 | Proceed to "Seat Heater for Rear Left Seat does not Operate" | |
| Rear seat RH heater does not operate*3 | Proceed to "Seat Heater for Rear Right Seat does not Operate" | |
| Rear seat LH and RH heaters do not operate*3 | Proceed to "Seat Heater Switch Circuit" |
*1: for LHD
*2: for RHD
*3: w/ Rear Seat Heater