Component Tests and General Diagnostics

CRANK ANGLE SENSOR




The crank angle sensor senses the crank angle (piston position) of each cylinder, converts it into a pulse signal. The ECU, computes the engine speed and controls the fuel injection timing and ignition timing based on the input signal.

Circuit Diagram





Troubleshooting Hints
1. If unexpected shocks are felt during driving or the engine stalls suddenly, shake the crank angle sensor harness. If this causes the engine to stall, check for poor contact of the sensor connector.
2. If the tachometer reads 0 rpm when the engine is cranked, check for faulty crank angle sensor, broken timing belt or ignition system problems.
3. If the engine can be run at idle even if the crank angle sensor reading is out of specification, check the followings:
1) Faulty engine coolant temperature sensor
2) Faulty idle speed control servo
3) Poorly adjusted reference idle speed

Using Multi-use Tester





Harness Inspection Procedures