Automatic Warming-Up System Does Not Operate - Komatsu ecot3 PC300LC-8 Shop Manual

SEN02632-02
E-3 Automatic warming-up system does not operate
Trouble

• Automatic warming-up system does not operate.

• When engine coolant temperature is below 30°C, automatic warm-up system raises engine speed to
Related infor- 1,250 rpm.
mation • If fuel control dial is opened more than 70% for 3 seconds or longer when starting switch is turned
ON or after engine is started, automatic warm-up system is turned OFF.
Possible causes Defective engine coolant
1
and standard temperature signal
value in normal
state
Defective pump controller,
2 engine controller or machine
monitor
12
Cause Standard value in normal state/Remarks on troubleshooting
In the case monitoring is not normally indicated, proceed to trouble-
shooting No. E-14.
Monitoring code
Since trouble is in system, troubleshooting cannot be carried out. (If
causes stated above are not detected, pump controller, engine con-
troller or machine monitor may be defective.)
Item
Engine coolant tem-
04102
perature
40 Troubleshooting
1
Normal display
Compare with actual
engine coolant tem-
perature
PC300, 350-8