Ckp Sensor (Crankshaft Position) - Navistar International DT 466 Diagnostic/Troubleshooting Manual

7 ELECTRONIC CONTROL SYSTEMS DIAGNOSTICS

CKP Sensor (Crankshaft Position)

Figure 406 Function diagram for the CKP sensor
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
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
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.
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:
International® DT 466, DT 570, and HT 570
diesel engines, is the Camshaft Position (CMP)
sensor used with other International® diesel engines.
EGES-270-1
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.
From the CKP signal frequency, the ECM
The long CKP sensor,
351
used with