Parts for your 1999 Toyota Rav4-Camshaft sensor

1999 Toyota RAV4 Camshaft Sensor: What it does and how to look after it

Based on Toyota’s factory repair literature for the 3S‑FE engine (Engine Control section) and the 1999 RAV4 Electrical Wiring Diagram, this model absolutely uses a camshaft position signal. It’s not a separate sensor on the cam cover, instead, the camshaft sensor function (the “G” signal) is built into the distributor, alongside the “NE” engine speed pickup. Haynes-style service manuals covering the first‑gen RAV4 back this up as well, and even OBD‑II faults like P0340 refer to that distributor‑mounted cam signal circuit.

On the 1999 RAV4, the camshaft sensor’s job is to tell the engine computer which stroke each cylinder is on. That lets the ECU fire fuel injectors and spark at the right time for smooth starts, tidy idle and proper performance. Lose that “G” signal and it can crank longer, run rough, misfire, or refuse to start. The dash might stay quiet, or it may throw a code like P0340/P0341.

Here’s the twist for this year: because the sensor lives inside the distributor, you won’t find a separate cam sensor to swap on the cylinder head. Servicing usually means checking the distributor assembly, its internal pickup, and the wiring to the ECU. Many techs replace the distributor as a complete unit when the pickup fails, as it’s quicker and avoids mucking about with tiny internal components and air gaps.

Good maintenance is straightforward:

• Inspect the distributor plug and loom for brittle insulation, green crust or oil intrusion. Clean terminals and fix any dodgy wiring.
• If there’s oil inside the distributor, its shaft seal may be leaking—oil can contaminate the pickup and cause signal dropouts.
• When replacing the distributor, mark its position relative to the head before removal. Refit in the same orientation so base timing stays put, then verify timing per the Toyota procedure with a scan tool or service pins as specified in the manual.
• Use quality parts, cheap reman distributors can cause intermittent no‑start headaches.

There’s no scheduled replacement interval for the cam signal pickup—treat it as “inspect and replace if faulty.” If the RAV4 shows hard starts, stalling when warm, a dead tacho during cranking, or throws a cam sensor code, it’s time to test the distributor’s G/NE outputs and consider a replacement unit.

FAQs

Does a 1999 RAV4 have a separate camshaft sensor?
Not on this model. The camshaft position signal is generated inside the distributor. That’s why parts listings often show a distributor assembly rather than a standalone cam sensor for this year.

What are common signs the cam sensor (distributor pickup) is failing?
Long cranking, random stalling, rough running, misfires, a dead or jumpy tacho, and fault codes like P0340/P0341. Oil inside the distributor or damaged wiring can cause the same symptoms.

Can it be driven with a faulty cam signal?
Sometimes it may run in a limp mode or intermittently start, but it can also cut out without warning. Best bet is to diagnose and sort it promptly to avoid being stranded and to protect the catalytic converter from misfire damage.