Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA2009SIENNA XLE, FWDREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTSEATSREAR NO. 2 SEAT ASSEMBLY (W/ POWER STOWING FUNCTION)PROBLEM SYMPTOMS TABLE
2009 Toyota Sienna XLE, FWD
Problem Symptoms Table
2009 Toyota Sienna XLE, FWDSECTION 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 "Suspect 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 fuse and relays related to the system before inspecting the suspected areas below.
POWER REAR NO. 2 SEAT with STOWING FUNCTION
PROBLEM SYMPTOMS
| Symptom | Suspected area | See |
|---|---|---|
| No functions operate. | 1. Power source circuit | POWER SOURCE CIRCUIT |
| 2. Fold seat control ECU | - | |
| The folding-down function does not operate. | 1. Park/Neutral position switch circuit | PARK / NEUTRAL POSITION SWITCH CIRCUIT |
| 2. Back door courtesy switch circuit | BACK DOOR COURTESY SWITCH CIRCUIT | |
| 3. Lock switch circuit | LOCK SWITCH CIRCUIT | |
| 4. Reclining motor circuit | RECLINING MOTOR CIRCUIT | |
| 5. Fold seat switch circuit | FOLD SEAT SWITCH CIRCUIT | |
| 6. Folding motor circuit | FOLDING MOTOR CIRCUIT | |
| 7. Folding motor | - | |
| 8. Fold seat control ECU | - | |
| The return function does not operate. | 1. Park/Neutral position switch circuit | PARK / NEUTRAL POSITION SWITCH CIRCUIT |
| 2. Back door courtesy switch circuit | BACK DOOR COURTESY SWITCH CIRCUIT | |
| 3. Reclining motor circuit | RECLINING MOTOR CIRCUIT | |
| 4. Folding motor circuit | FOLDING MOTOR CIRCUIT | |
| 5. Fold seat switch circuit | FOLD SEAT SWITCH CIRCUIT | |
| 6. Release actuator circuit | RELEASE ACTUATOR CIRCUIT | |
| 7. Folding motor | - | |
| 8. Release actuator | - | |
| 9. Fold seat control ECU | - | |
| The stowing function does not operate. | 1. Park/Neutral position switch circuit | PARK / NEUTRAL POSITION SWITCH CIRCUIT |
| 2. Back door courtesy switch circuit | BACK DOOR COURTESY SWITCH CIRCUIT | |
| 3. Reclining motor circuit | RECLINING MOTOR CIRCUIT | |
| 4. Folding motor circuit | FOLDING MOTOR CIRCUIT | |
| 5. Fold seat switch circuit | FOLD SEAT SWITCH CIRCUIT | |
| 6. Fold lock switch circuit | FOLD LOCK SWITCH CIRCUIT | |
| 7. Folding motor | - | |
| 8. Fold seat control ECU | - | |
| The reclining function does not operate. | 1. Lock switch circuit | LOCK SWITCH CIRCUIT |
| 2. Reclining motor circuit | RECLINING MOTOR CIRCUIT | |
| 3. Rear power seat switch circuit | REAR POWER SEAT SWITCH CIRCUIT | |
| 4. Fold seat control ECU | - | |
| The indicator does not come on or blink. | 1. Indicator circuit | INDICATOR CIRCUIT |
| 2. Fold seat control ECU | - |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.