Home » International DT466 » International DT466 – ELECTRONIC CONTROL SYSTEMS DIAGNOSTICS – CKP Sensor (Crankshaft Position)

International DT466 – ELECTRONIC CONTROL SYSTEMS DIAGNOSTICS – CKP Sensor (Crankshaft Position)

The function diagram for the CKP sensor includes the following:
• CKP sensor
• Electronic Control Module (ECM)
• Injector Driver Module (IDM)
• Fuel injector
• ENGINE lamp (amber)

Function
The CKP sensor provides the ECM with a signal that indicates crankshaft speed and position. As the crankshaft turns the CKP sensor detects a 60 tooth timing disk on the crankshaft. Teeth 59 and 60 are missing. By comparing the CKP signal with the CMP signal, the ECM calculates engine rpm and timing requirements. The CKP is installed in the top left side of the flywheel housing.

The sensor produces pulses for each tooth edge that passes it. Crankshaft speed is derived from the frequency of the CKP sensor signal. The crankshaft position is determined by synchronizing the SYNC tooth with the SYNC gap signals from the target disk. From the CKP signal frequency, the ECM can calculate engine rpm and timing requirements.
Diagnostic information on the CKP input signal is obtained by performing accuracy checks on frequency, and duty cycle with software strategies.

NOTE: The long CKP sensor, used with International® DT 466, DT 570, and HT 570 diesel engines, is the Camshaft Position (CMP) sensor used with other International® diesel engines.