Auto Engine Warm-Up Device Does Not Work - Komatsu Galeo PC800-8 Shop Manual

SEN00793-02
E-3 Auto engine warm-up device does not work
Failure
• The auto engine warm-up device does not work.
phenomenon
• The auto engine warm-up device is activated, when the engine coolant temperature is below 30°C,
and raise the engine rotation up to 1,200 rpm.
Relative • The auto engine warm-up device is released by keeping the fuel dial opening at above 70% for more
information than 3 seconds, when the engine starting switch is in the ON position or after the engine is started.
• If the engine coolant temperature is below 10°C, the turbocharger protection function operates to keep
the engine speed below 1,000 rpm for up to 5 seconds after the engine is started.
Possible causes Engine coolant tempera-
1
and standard ture signal fault
value in normal
state
2 Defective engine controller
16
Cause Standard value in normalcy and references for troubleshooting
a Turn the starting switch ON for the troubleshooting (monitoring).
Monitoring code
If the display on the monitor panel is abnormal, carry out troubleshooting
in "Engine coolant thermometer does not display normally".
If cause 1 is not detected, the engine controller may be defective. (Since
trouble is in the engine controller, troubleshooting cannot be carried
out.)
Item
Engine coolant
04107 temperature
(low temperature)
40 Troubleshooting
Normal display
Compare the monitor
indication with the
actual engine coolant
temperature.
PC800, 850-8