Diagnostic Detection Logic

DIAGNOSTIC DETECTION LOGIC
Background Information
- When the engine is running, the crankshaft position sensor outputs a pulse signal.
- The engine control module checks whether the pulse signal is input while the engine is cranking.
- The engine control module checks the pulse signal patterns of the crankshaft position sensor.

When a Fault May Be Recorded
- Ignition switch: ON
- Engine is not cranking.

What Abnormality Sets This Code
- Regular signal patterns for cylinder discrimination from the crankshaft position sensor signal and the camshaft position sensor signal are not input 20 times in a 10 seconds period.

Other Times a Fault May Be Recorded
- Engine is cranking.

What Abnormality Sets This Code
- Sensor output voltage does not change for 4 seconds (no pulse signal input).

Effect on the Vehicle Systems
NO limp-in
Vehcile will not start or run.

Probable Causes
- Crankshaft position sensor failed.
- Open or shorted crankshaft position sensor circuit, or loose connector.
- Engine control module failed.

TROUBLESHOOTING HINTS
1. If an impact is suddenly felt during driving or the engine suddenly stalls during idling, try shaking the crankshaft position sensor during idling. If the engine stalls, the cause is probably improper or incomplete contact of the crankshaft position sensor's connector.
2. If the crankshaft position sensor output rpm is 0 rpm during cranking when the engine cannot be started, the cause is probably a malfunction of the crankshaft position sensor or a broken timing belt.
3. If the indicated value of the crankshaft position sensor output rpm is 0 rpm during cranking when the engine cannot be started, the cause is probably a failure of the ignition coil's primary current to intermittently pulse correctly, so a malfunction of the ignition system circuitry, the ignition coil and/or the power transistor is the probable cause.