JLG 1850SJ, Service And Maintenance Manual, Page: 127 / 712

SECTION 3 - CHASSIS & TURNTABLE
3121619 3-77
752 136 107 0 Air filter differential pressure: the pressure
difference of the intake air between the filter
inlet and outlet calculated by ECU is above
the target range and the ECU activates a
system reaction Pressure loss above target range with system
reaction, air filter clogged or defective,
sensor not working, connection cable damaged
Pressure value above warning threshold Check airfilter and if necessary clean or renew it,
check cabling, check sensor and if
necessary replace it, check connection cable
and if necessary repair or replace it
772 223 102 2 Deviation between sensed intake manifold
pressure is not plausible compared to envi-
ronment pressure. Which sensor is not okay
can not be said. deviation between ambient pressure sensor
and charge air pressure sensor at not
running engine to high 1) Exchange boost pressure sensor
2) Exchange ECU
774 223 102 1 charge air pressure below lower limit measured charge air pressure below the thresh-
old. Check complete air system of engine for mas-
sive leakage, especially from compressor
to intake air manifold.
Check air filter.
Exchange charge air presure sensor.
776 223 102 3 Charge air pressure sensor: the measured
voltage of sensor by ECU is out of the target
range The Sensor Voltage is above the Threshold. Check cabling, if charge air pressure/tempera-
ture sensor is not working, check sensor
and if necessary replace it, check connection
cable and if necessary repair or replace it.
777 223 102 4 Charge air pressure sensor: the measured
voltage of sensor by ECU is out of the target
range The Sensor Voltage is below the Threshold. Check cabling, if charge air pressure/tempera-
ture sensor is not working, check sensor
and
if necessary replace it, check connection cable
and if necessary repair or replace it
791 693 411 0 delta pressure across venturi in EGR line
above physical high limit sensed value of venturi difference pressure >
high limit Threshold for error detection is an internal ECU
threshold.
EGR-Valve blocked open
EGR-Valve actuator defect
EGR-cooler defect (check for coolant water)
Reed Valve defect
Intake throttle blocked in closed position =>
Check intake throttle
Exhaust pressure too high => Check Exhaust
pressure
Check Nox-sensor upstream SCR catalyst
dp venturi sensor defect
792 693 411 1 delta pressure across venturi in EGR line
below physical low limit sensed value of venturi difference pressure <
low limit Threshold for error detection is an internal ECU
threshold.
Check correct mounting of difference pressure
sensor at venturi tube
Exchange difference pressure sensor broken
Table 3-10. Engine Fault Codes
Deutz
Code
Blink
Code
SPN FMI Description Possible Cause Action