System Description

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

TROUBLESHOOTING HINTS
1. If unexpected shocks are felt during driving or the engine stalls suddenly, shake the crankshaft position 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 crankshaft position sensor, broken timing belt or ignition system problems.
3. If the engine can be run at idle even if the crankshaft position sensor reading is out of specification, check the following:
- Faulty engine coolant temperature sensor
- Faulty idle speed control motor
- Poorly adjusted reference idle speed