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.
Camshaft Position Sensor
Camshaft sensor contains a pick-up coil. On GS430, LS430, LX470 and SC430, signal plate has one tooth on its outer circumference, and is mounted on camshaft. On ES300, GS300, IS300 and RX300, signal plate has three teeth on its outer circumference, and is mounted on camshaft. On all models, as camshaft rotates, a protrusion on signal plate passes near pick-up coil. This induces AC voltage in pick-up coil. ECM senses this voltage signal and interprets it as camshaft position.
The ECM uses input signal for determining ignition timing (spark advance) and for controlling fuel injection system, idle speed control system, heated oxygen sensor system and intake air control valve system. See CAMSHAFT POSITION SENSOR LOCATION table.
| Application | Location |
|---|---|
| ES300 & RX300 | At Rear Of Each Cylinder Head, Below Valve Cover |
| GS300 & IS300 | Left Rear Intake Side Of Cylinder Head |
| GS430, LS430, LX470 & SC430 | Mounted To Front Of Left Upper (No. 3) Timing Belt Cover |
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.