Navistar INTERNATIONAL DT 466 User Manual

1 ENGINE SYSTEMS 51
Crankshaft Position (CKP)
The C KP 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
requiremen ts. T he CKP is installed in the top left side
of the flywheel housing.
NOTE: This long CKP sensor, used with
International® DT 466, DT 570, and HT 570
diesel engines, is the C am shaft Position (CMP)
sensor used with other International® diesel engines.
Camshaft Position (CMP)
The CMP sensor provides the ECM with a signal that
indicates camshaft position. As the cam rotates, the
sensor identifies the position of the cam by locating
a peg on the c am. The CMP is installed in the front
cover, above and to the right of the water pump pulley.
NOTE: This short C MP sensor, used with
International® DT 466, DT 570, and HT 570 diesel
engines, is the Crankshaft Position (CKP) sensor
used with other International® diesel engines.
Vehicle Speed Sensor (VSS)
The VSS pr ovides the EC M with transmission tail shaft
speed by sensing the rotation of a 16 tooth gear on
the rear of the transmission. The detected sine wave
signal (AC), received by the ECM, is u se d with tire size
and axle ratio to calculate vehicle speed . The VSS is
on left side of the transmission.
Figure 43 P otentiometer
1. Gr ound
2. Electronic Control Modu le (ECM)
3. Microprocessor
4. Voltage reference (V
REF
)
5. Accelerator Position Sensor (APS)
Potentiometers
• APS
A potentiometer is a variable voltage divider that
senses the position of a mechanical component.
A referen ce voltage is applied to one e nd of the
potentiometer. Mechanical rotary or linear motion
moves the wiper along the resistance material,
changing voltag e at each point along the resistive
material. Voltage is proportional to the amount of
mechanical movement.
Accelerator Position Sensor (APS)
The APS provides the ECM with a feedback signal
(linear analog voltage) that indicates the operator’s
demand for power. The APS is mounted in the
accelerator peda l.
EGES-270-1
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.

Navistar INTERNATIONAL DT 466 Specifications

General

Brand	Navistar
Model	INTERNATIONAL DT 466
Category	Engine
Language	English