A power voltage of 5 V is applied to the crank angle
sensor power terminal (terminal No. 3) from the engine-ECU (terminal No. 68) and earthed to
engine-ECU (terminal No. 91) from the crank angle sensor (terminal No. 1).
The sensor signal is inputted to the engine-ECU (terminal No. 67) from the crank
angle sensor output terminal (terminal No. 2).
The crank angle sensor detects the crank angle (position)
and inputs a pulse signal to the engine-ECU.
In response to the signal, the engine ECU detects the engine speed, controls the
fuel injection timing and fuel injection quantity, etc.
Battery positive voltage is 6 – 16 V.
The number of output pulses from the crank angle sensor per engine rotation is one
Failed crank angle sensor
Open/short circuit in crank angle sensor circuit or loose connector contact