The crankshaft position sensor senses the crank angle (piston position) of each cylinder and converts it into a pulse signal. Based on the input signal, the ECM computes the engine speed and controls the fuel injection timing andignition timing.
If unexpected shocks are felt during driving or the engine stalls suddenly, shake the crankshaft position sensor harness. If this causes the engine tostall, check for poor sensor connector contact.
If the tachometer reads 0 rpm when the engine is cranked, check for faulty crank angle sensor, broken timing belt or ignition system problems.
If the engine can be run at idle even if the crank angle sensor reading is out of specification, check the following:
● Faulty engine coolant temperature sensor ● Faulty idle speed control motor ● Poorly adjusted reference idle speed |
Check Item | Check conditions | Check content | Normal state |
Crankshaft position sensor | ● Engine cranking ● Tachometer connected (check on and off ignition coil by tachometer) | Compare cranking speed and multi-tester reading | Indicated speed agrees |
Check Item | Check conditions | Coolant temperature | Test specification |
Crankshaft position sensor | ● Engine: Running at idle ● Idle position switch: ON | When -20°C (-4°F) | 1,500 ~ 1,700 rpm |
When 0°C (-32°F) | 1,350 ~ 1,550 rpm | ||
When 20°C (-68°F) | 1,200 ~ 1,400 rpm | ||
When 40°C (-104°F) | 1,000 ~ 1,200 rpm | ||
When 80°C (-176°F) | 650 ~ 850 rpm |
