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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSTOYOTA2009SEQUOIA LIMITED, 5.7 Y, RWDREPAIR AND DIAGNOSISBODY & FRAMEDOOR LOCKSTHEFT DETERRENT & KEYLESS ENTRYENGINE IMMOBILIZER SYSTEMPROBLEM SYMPTOMS TABLE
2009 Toyota Sequoia Limited, 5.7 Y, RWD
Problem Symptoms Table
2009 Toyota Sequoia Limited, 5.7 Y, RWDSECTION Problem Symptoms Table
HINT:
- 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.
Engine Immobilizer System
PROBLEM SYMPTOMS CHART
| Symptom | Suspected Area | Reference |
|---|---|---|
| Engine does not start | Ignition switch (for 2UZ-FE) | INSPECTION |
| Ignition switch (for 3UR-FE) | INSPECTION | |
| ECU power source circuit | ECU POWER SOURCE CIRCUIT | |
| Transponder key ECU | PROBLEM SYMPTOMS TABLE | |
| SFI system (for 2UZ-FE) | HOW TO PROCEED WITH TROUBLESHOOTING | |
| SFI system (for 3UR-FE) | HOW TO PROCEED WITH TROUBLESHOOTING | |
| Security indicator light malfunction | Security indicator light circuit | SECURITY INDICATOR LIGHT CIRCUIT |
| ECU power source circuit | ECU POWER SOURCE CIRCUIT | |
| Transponder key ECU | PROBLEM SYMPTOMS TABLE | |
| Accessory meter assembly | - | |
| No code is output | Diagnosis circuit | - |
| ECU power source circuit | ECU POWER SOURCE CIRCUIT | |
| Transponder key ECU | PROBLEM SYMPTOMS TABLE | |
| Unable to register the key | Door courtesy switch circuit | DOOR COURTESY SWITCH CIRCUIT |
| Ignition switch (for 2UZ-FE) | INSPECTION | |
| Ignition switch (for 3UR-FE) | REASSEMBLY | |
| ECU power source circuit | ECU POWER SOURCE CIRCUIT | |
| Key | - | |
| Transponder key ECU | PROBLEM SYMPTOMS TABLE |
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.