Toyota 4Runner 2001-06

Camshaft Position Sensor

Print

Description & Operation



2RZ-FE And 3RZ-FE Engines

The Camshaft Position (CMP) sensor provides the G signal to the ECM. The rotating signal plate has one tooth on its circumference and is built into the distributor. When the camshafts rotate, the tooth on the signal plate comes close to the pick-up coil and the air gap on the pick-up coil changes. This causes fluctuations in the magnetic field, generating a small voltage in the pick-up coil. At the same time, the crankshaft position sensor signal plate (equipped with 34 teeth and mounted on the crankshaft) generates 34 signals for every engine revolution. The ECM detects the standard crankshaft angle based on the camshaft position sensor G signals and the actual crankshaft angle and engine speed by the NE signals.

5VZ-FE Engine

The Camshaft Position (CMP) sensor is installed on the front of the right cylinder head of the 5VZ-FE engine. The timing rotor has been integrated with the right bank camshaft timing pulley. While the camshaft rotates, the air gap between the protrusion on the timing rotor and the pick-up coil changes. This causes fluctuation in the magnetic field and generates a voltage signal in the pick-up coil.

Removal & Installation



3RZ-FE Engine


Click image to see an enlarged view

Fig. Camshaft Position (CMP) sensor component location-3RZ-FE engine

  1. Remove the throttle body. The cooling system has to be drained since the throttle body has two water hoses connected to it, to warm the throttle body and prevent icing. Tag for identification, all of the vacuum hoses that must be disconnected from the intake air connector and the throttle body.
  2.  
  3. Locate the Camshaft Position (CMP) sensor where it mounts to the left side of the engine. Detach the electrical connector. Remove the sensor hold-down bolt and remove the sensor.
  4.  
  5. Installation is the reverse of the removal procedure. Tighten the sensor hold-down bolt to 48 inch lbs. (5.4 Nm).
  6.  

5VZ-FE Engine


Click image to see an enlarged view

Fig. Location of the Camshaft Position (CMP) sensor-5VZ-FE engine



Click image to see an enlarged view

Fig. Exploded view of the CMP Sensor mounting-5VZ-FE engine

  1. Remove the timing belt cover that goes over the cam drive sprockets.
  2.  
  3. Locate the camshaft position sensor where it mounts to the right side cylinder head. Detach the electrical connector. Remove the sensor hold-down bolt and remove the sensor.
  4.  
  5. Installation is the reverse of the removal procedure. Tighten the sensor hold-down bolt to 69 inch lbs. (7.8 Nm).
  6.  

 
label.common.footer.alt.autozoneLogo