JLG 450A_AJ Series II Service Manual - Manual (Page 106)

SECTION 3 - CHASSIS & TURNTABLE
3-66 – JLG Lift – 3121290
3.11 DEUTZ EMR 2
The EMR2 system consists of sensors, control unit, and an actu-
ator. Engine-side controls and the JLG Control System are con-
nected by separate cable harnesses to the EMR control unit.
Engine sensors provide control unit electronics with informa-
tion of the current condition of engine and preconditions
(throttle position etc.). The EMR2 controls an actuator that
operates the injection pump control rod and adjusts fuel
quantity to meet performance requirements.
Regulating rod position is reported back and corrected by the
control rod travel sensor, situated together with rotation mag-
nets in the actuator housing.
The EMR2 is equipped with safety devices and measures in the
hardware and software for emergency running (Limp home)
functions.
To switch engine off, the EMR2 is switched in a de-energized
fashion over the ignition switch. A strong spring in the actua-
tor presses the control rod in the de-energized condition to
the zero position. As a redundancy measure, an additional
solenoid serves for switching off and this, independently of
the actuator, also moves the control rod in the de-energized
condition into the zero position.
After programming over the ISO9141 interface, the EMR2 pos-
sesses a motor-specific data set matched by engine serial
number. Modules cannot be swapped between engines.
Figure 3-46. EMR 2 Engine Side Equipment
GLOW PLUG
POWER SUPPLY
COOLANT TEMPERATURE
SENSOR
CONTROL ROD POSITION
SENSOR/ACTUATOR
CAMSHAFT
SPEED
OIL PRESSURE
SENSOR
JLG SYSTEM USES JLG ANALYZER TO
REPORT FAULTS
DIAGNOSIS INTERFACE/CAN-BUS;
JLG SYSTEM USES THIS TO CONTROL
ENGINE & FAULT REPORTING.
JLG SYSTEM HANDLES ENGINE START/
STOP; EMR2 TAKES CONTROL OF THE
ENGINE AT 700RPM