Troubleshooting; Engine Troubleshooting - Hitachi EX1900-5 Operator's Manual

ENGINE TROUBLESHOOTING

Engine troubleshooting switch (2) is located inside left con-
sole side cover (1) in the cab. If any trouble occurs in the
engine and/or the engine related parts, and either engine
warning indicator (4) or engine stop indicator (3) illuminates
or flashes continuously, the fault codes (indicating an en-
gine problem by flashing the engine warning indicator) can
be displayed by operating engine troubleshooting switch
(2).
Turn engine troubleshooting switch (2) ON so that the en-
gine controller makes the engine stop indicator or the en-
gine warning indicator flash in the specified pattern (fault
code) depending on the trouble encountered.
Trouble Status
Abnormal Throttle Sensor
Abnormal Boost Pressure
Abnormal Engine Speed
Sensor
Abnormal Actuator Power
Source
Abnormal Actuator Sensor
Abnormal Sensor Power
Source
NOTE: Flashing pattern (fault code) * (2-5) means that
the engine warning indicator flashes twice,
pauses for a short time, and flashes 5 more
times.
IMPORTANT: When the engine warning indicator or
the engine stop indicator illuminates,
immediately contact your nearest Hitachi
dealer for inspection.
NOTE: Depending on electrical signals arriving from the
sensors described below, the engine controller
drives the engine governor so that the fuel injec-
tion volume is regulated by the governor to meet
the operating conditions.

TROUBLESHOOTING

Fault Code Display Indicator
(Flashing Pattern)
Engine Warning Indicator
*(2-5)
Engine Warning Indicator
(2-3)
Engine Stop Indicator (2-1)
Engine Stop Indicator (4-1)
Engine Stop Indicator (4-5)
Engine Warning Indicator
(4-3)
11-1
1
M146-07-048
2
M18C-01-029
4
3
M146-01-039