Circuit Description

WARNING: This page is about a different car, the 2003 Lexus ES 300. However, it is still accessible from the selected car via links, so may be relevant.

VVT sensor LH (camshaft position sensor No. 1 (Bank 2)) consists of a magnet and IC circuit board in which MR device is built. On signal plate for VVT signal, there are 3 convex sides on its outer circumference. When camshaft turns, air-gap between protrusion on signal plate and sensor will change, and magnetic field applied to MR device in sensor will change. A signal is output based on change in resistance of MR device caused by these changes. In addition, VVT sensor LH adopts a sensor using a signal plate and a magnetic resistance element. By switching air-gap of signal plate and sensor, ECM voltage will be converted to a rectangular waveform or pattern and output as a signal.

If DTCs are set, there has been no VVT sensor (camshaft position sensor No. 1 (Bank 2)) signal to ECM for 5 seconds or more. Possible causes are:

Open or short in VVT sensor.
Faulty VVT sensor.
Faulty camshaft timing gear.
Faulty ECM.