Sub Crank Angle Sensor

In the event optical crank angle sensor should fail, sub crank angle sensor acts as a back-up for that sensor. Sub crank angle sensor consists of is a magnetic pick-up and a signal rotor containing 8 machined grooves. Sensor produces a fluctuating AC voltage signal to the ECU.

Sensor is capable of producing an RPM signal only, not a No. 1 cylinder TDC signal. While sensor is providing RPM input (during crank angle sensor failure), ECU will operate in a fail-safe mode, resulting in simultaneous fuel injection rather than sequential.