Case CX240 - Electronic Control System Details

CX210/CX240 ELECTRONIC FUEL SYSTEM
8 - 3
CX EXCAVATORS
ELECTRONIC CONTROL SYSTEM
The electronic control system for the Case 24 valve 5.9 Liter Engine uses input information
from a number of sensors to determine the quantity and timing of the fuel delivery to the
engine.
The engine control module (ECM) is located on the left side of the engine and has two 50 pin
connectors for inputs and outputs. All engine electrical connections are made to the rear 50
pin connector with the exception of the throttle, idle validation and water in the fuel (WIF)
sensors, which connect at the front 50 pin connector.
Inputs:
• The engine speed sensor (ESS) is a three wire sensor, located on the lower left side of
the engine, just above the oil pan rail. It is a three wire magnetic sensor that measures
speed and timing for fuel injection from a removable two piece multiple tooth speed ring
mounted on the crankshaft between #5 and #6 cylinders.
• The engine position sensor is a three wire sensor, located at the left rear of the timing
gear cover, below the injection pump. The purpose of this sensor is to verify the position
of the #1 piston during diagnostic testing.
• The intake manifold temperature sensor is a two wire sensor, located at the left rear of the
cylinder head and indicates the temperature of the intake manifold air.
• The intake manifold pressure sensor is a three wire sensor, located at the left rear of the
cylinder head and indicates the turbocharger boost pressure.
• The coolant temperature sensor is a two wire sensor, located at the top front right of the
cylinder head and indicates the coolant temperature in the engine.
• The engine oil pressure sensor is a three wire sensor, located at the left center of the
engine, just below the electronic control module.
• A "water in the fuel" sensor alerts the operator to drain the water from the filter.
• A throttle potentiometer provides desired speed information to the ECM.
• An idle validation switch on the throttle assembly provides low idle position information to
the ECM.
• A data buss connector (J1939) transmits communication between the Electronic Control
Module (ECM) and other onboard controllers.
24 volt power for the system is provided by the battery through the rear connector of the
Electronic Control Module.