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 MANUALSTOYOTA2025HIGHLANDER XSEREPAIR AND DIAGNOSISGENERAL INFORMATIONENGINE PERFORMANCEMAP - ENGINE PERFORMANCE & MAINTENANCEENGINE PERFORMANCE AND MAINTENANCETHROTTLE BODIES
2025 Toyota Highlander XSE
Throttle Bodies
2025 Toyota Highlander XSESECTION Throttle Bodies
| Condition | Code | Procedure |
|---|---|---|
| 15,000 miles or 12 months beyond most recent Chemical Engine Decarbonization | 5 | Suggest chemical engine decarbonization |
| Connector (Weatherpack type) leaking | A | Require repair or replacement |
| Connector broken | A | Require repair or replacement |
| Connector melted | A | Require repair or replacement |
|
NOTE:
Determine cause and correct prior to repair or replacement of part.
|
||
| Connector missing | C | Require replacement |
| Contaminated | A | Require repair or replacement |
|
NOTE:
Determine source of contamination, such as engine coolant, fuel, metal particles, or water. Require repair or replacement.
|
||
| Deposits on throttle body components | A | Require repair |
|
NOTE:
Some throttles are coated by manufacturer; follow OEM-recommended procedures.
|
||
| Leaking | A | Require repair or replacement |
| Restricted, affecting performance | A | Require repair |
|
NOTE:
Some components may be serviceable; check for accepted cleaning procedure.
|
||
| Terminal broken | A | Require repair or replacement |
| Terminal burned, affecting performance | A | Require repair or replacement |
|
NOTE:
Determine cause and correct prior to repair or replacement of part.
|
||
| Terminal burned, not affecting performance | 2 | Suggest repair or replacement |
| Terminal corroded, affecting performance | A | Require repair or replacement |
| Terminal corroded, not affecting performance | 2 | Suggest repair or replacement |
| Terminal loose, affecting performance | B | Require repair or replacement |
| Terminal loose, not affecting performance | 1 | Suggest repair or replacement |
| Threads damaged | A | Require repair or replacement |
| Threads stripped (threads missing) | A | Require repair or replacement |
| Throttle shaft binding, affecting performance | A | Require repair or replacement |
| Throttle shaft worn, affecting performance | A | Require repair or replacement |
| Throttle shaft worn, not affecting performance | 1 | Suggest repair or replacement |
| Wire lead conductors exposed | B | Require repair or replacement |
| Wire lead corroded | A | Require repair or replacement |
| Wire lead open | A | Require repair or replacement |
| Wire lead shorted | A | Require repair or replacement |
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.