JLG 450A_AJ Series II Service Manual - Manual (Page 158)

SECTION 3 - CHASSIS & TURNTABLE
3-108 – JLG Lift – 3121180
3.16 DEUTZ EMR 2 (S/N 85332 TO PRESENT)
The EMR2 system consists of sensors, control unit, and
an actuator. Engine-side controls and the JLG Control
System are connected by separate cable harnesses to the
EMR control unit.
Engine sensors provide control unit electronics with infor-
mation of the current condition of engine and precondi-
tions (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 rota-
tion magnets 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-ener-
gized fashion over the ignition switch. A strong spring in
the actuator 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
possesses a motor-specific data set matched by serial
number to the engine. Modules cannot be swapped
between engines.
Figure 3-64. EMR 2 Engine Side Equipment
GLOW PLUG
POWER SUPPLY
COOLANT TEMPERATURE
SENSOR
CONTROL ROD POSITION
SENSOR/ACTUATOR
CAMSHAFT SPEED
SENSOR
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