JLG 510AJ Service Manual - Manual (Page 114)

SECTION 3 - CHASSIS AND TURNTABLE
3-72 – JLG Lift – 3121181
3.11 DEUTZ EMR 2 (S/N 1300000981 TO PRESENT)
The EMR2 consists of sensors, control unit, and actuator.
Engine-side controls and the JLG Control System are con-
nected by a separate cable harnesses to the EMR control unit.
Engine sensors provide the control unit with all relevant physi-
cal parameters. In accordance with information of current con-
dition of the engine and preconditions (throttle position etc.),
the EMR2 controls an actuator that operates the control rod of
the injection pump and adjusts fuel quantity to match perfor-
mance requirements.
The exact position of the regulating rod is reported back and
corrected, by means of the control rod travel sensor, situated
together with rotation magnets in a housing of the actuator.
The EMR2 is equipped with safety devices and programming
to ensure emergency running (Limp home) functions.
To switch engine off, the EMR2 is switched in a de-energized
fashion over the ignition switch. A spring in the actuator
presses the control rod in the de-energized condition to the
zero position. As a redundancy measure, an additional sole-
noid independently of the actuator, also moves the control
rod in the de-energized condition to the zero position.
After programming is done over the ISO9141 interface, the
EMR2 possesses a motor-specific data set fixedly assigned to
the engine.
Each EMR2 module is matched by serial number to the engine.
Modules cannot be swapped between engines.
Figure 3-56. 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 SYS-
TEM USES THIS TO CONTROL THE ENGINE &
FAULT REPORTING.
JLG SYSTEM HANDLES ENGINE START/
STOP; EMR2 TAKES CONTROL OF THE
ENGINE AT 700RPM