JLG 1850SJ Service And Maintenance Manual page 127

Deutz Blink
SPN FMI
Code Code
752 136 107 0
772 223 102 2
774 223 102 1
776 223 102 3
777 223 102 4
791 693 411 0
792 693 411 1
3121619
Table 3-10. Engine Fault Codes
Description
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
Deviation between sensed intake manifold
pressure is not plausible compared to envi-
ronment pressure. Which sensor is not okay
can not be said.
charge air pressure below lower limit
Charge air pressure sensor: the measured
voltage of sensor by ECU is out of the target
range
Charge air pressure sensor: the measured
voltage of sensor by ECU is out of the target
range
delta pressure across venturi in EGR line
above physical high limit
delta pressure across venturi in EGR line
below physical low limit
SECTION 3 - CHASSIS & TURNTABLE
Possible Cause
Pressure loss above target range with system
reaction, air filter clogged or defective,
sensor not working, connection cable damaged
Pressure value above warning threshold
deviation between ambient pressure sensor
and charge air pressure sensor at not
running engine to high
measured charge air pressure below the thresh-
old.
The Sensor Voltage is above the Threshold.
The Sensor Voltage is below the Threshold.
sensed value of venturi difference pressure >
high limit
sensed value of venturi difference pressure <
low limit
Action
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
1) Exchange boost pressure sensor
2) Exchange ECU
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.
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.
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
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
Threshold for error detection is an internal ECU
threshold.
Check correct mounting of difference pressure
sensor at venturi tube
Exchange difference pressure sensor broken
3-77