Camshaft & Crankshaft Position Sensors

Camshaft & Crankshaft Position Sensors

Cam Position Sensors Operation for 1UZ-FE VVT-i Engines

Camshaft position sensor (G2 signal) consist of a signal plate and pickup coil.
The G2 signal plate has 1 tooth, on its outer circumference and is mounted on the left bank camshafts. When the camshafts rotate, the protrusion on the signal plate and the air gap on the pickup coil change, causing fluctuations in the magnetic field and generating an electromotive force in the pickup coil. The NE signal plate has 34 teeth and is mounted on the crankshaft. The NE signal sensor generates 34 signals for every engine revolution. The ECM detects the standard crankshaft angle based on the G2 signal and the actual crankshaft angle and the engine speed by the NE signals.

V8 Lexus VVT Position Sensor

Lexus V8 Position Sensor For 98 Model

Cam Position Sensors Operation for 1UZ-FE Non VVT-i Engines

Camshaft Position Sensor Signal

Camshaft Position Sensor Signal

PURPOSE 
The camshaft position sensors report camshaft rotation to the ECU. By overlapping the signal from the engine speed signal (NE) with that of the camshaft (G1 and G2) sensors, very accurate recording of cylinder position is possible.

LOCATION 
Mounted inside both distributor housings.

CONSTRUCTION 
Each sensor is a simple magnetic pickup.

Camshaft Position non vvt

Camshaft Position non vvt

OPERATION 
Each sensor reads a protrusion on the camshaft drive sprocket. As the protrusion passes over the sensor tip, the sensors magnetic field collapses and causes a voltage spike. The spike is read by the ECU.

ON-VEHICLE INSPECTION

NOTE: “Cold” and “Hot” in these sentences express the temperature of the coils themselves. “Cold” is from -10 °C (14 °F) to 50 °C (122 °F) and “Hot” is from 50 °C (122 °F) to 100 °C (212 °F) .

 

 

INSPECT CRANKSHAFT POSITION SENSOR

  

  1. Remove the sensor.
Resistance

  

  1. Using an ohmmeter, measure the resistance between the terminals.

If the resistance is not as specified, replace the sensor.

  1. Reinstall the sensor.
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