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 power seat does not operate with position control ECU and switch assembly (except cushion length function) | Position control ECU and switch assembly | |
| Wire harness or connector | - | |
| One or more power seat motors do not operate | Front seat adjuster assembly (driver seat) | |
| Front seatback frame sub-assembly (driver seat) | - | |
| Lumbar support adjuster assembly (driver seat) | - | |
| Power seat switch assembly | - | |
| Position control ECU and switch assembly | - | |
| Wire harness or connector | - | |
| Power seat position is not memorized | Position control ECU and switch assembly | |
| Outer mirror control ECU assembly (driver door) | - | |
| Main body ECU (Multiplex network body ECU) | - | |
| Seat memory switch (driver door) | - | |
| Wire harness or connector | - | |
| Power seat does not return to memorized position | Automatic transaxle system | |
| Lighting system (int) | - | |
| Position control ECU and switch assembly | - | |
| Main body ECU (Multiplex network body ECU) | - | |
| Outer mirror control ECU assembly (driver door) | - | |
| Wireless transmitter memory function does not operate | Power door lock control system | |
| Lighting system (int) | - | |
| Smart entry and start system (for start function) | - | |
| Position control ECU and switch assembly | - | |
| Main body ECU (Multiplex network body ECU) | - | |
| Certification ECU (Smart key ECU assembly) | - | |
| Wireless-linked return function does not operate | Wireless door lock control system | |
| Lighting system (int) | - | |
| Smart entry and start system (for entry function) | - | |
| Main body ECU (Multiplex network body ECU) | - | |
| Position control ECU and switch assembly | - | |
| Certification ECU (Smart key ECU assembly) | - | |
| Cushion length function does not operate with seat variable cushion switch | Seat variable cushion switch | |
| Cushion length motor (Front seat adjuster assembly (driver seat)) | ||
| Wire harness or connector | - |