DTC 22

OPERATION
The crank angle of each cylinder is detected by the light emitting diode and photo diode, and according to the signals sent from the diodes, ECU calculates the engine revolution speed and intake air amount per stroke, and also calculates the ignition advance angle. Then, ECU sends the primary current shutdown signal to the power transistor unit.

TROUBLESHOOTING HINTS
If circuit is shorted or a wire is broken in the crank angle sensor circuit, the engine will stop and not restart.

INSPECTION








Using Multi-use tester





Using Oscilloscope
(1) Run the engine at idle speed.
(2) Connect the probe to the oscilloscope pick-up point as shown in the circuit diagram, and check the waveform.











HARNESS INSPECTION