SFI SYSTEM


  1. CONSTRUCTION


    1. The camshaft timing control motor assembly consists of a motor that operates the camshaft timing gear assembly in the advance or retard direction, an EDU that controls the rotation of the motor, and a Hall IC type rotation sensor that detects the rotation of the motor.

    2. The motor is a brushless type DC motor that is installed in the timing chain cover forward of the camshaft timing gear assembly. It rotates coaxially with the intake camshaft.

    3. In accordance with the target valve timing, the ECM transmits the motor speed and direction of rotation instruction signals to the EDU. Based on those signals, the EDU drives the motor to advance or retard the timing of the intake camshaft.

    4. The EDU always monitors the operation of the motor, and transmits the actual motor speed, direction of rotation, and the state of operation signals to the ECM. The ECM uses these signals to diagnose malfunctions.

      A01FJFQE01