Automatic Warm-Up System Does Not Operate - Komatsu PC130-7 Shop Manual

TROUBLESHOOTING
E-6 Automatic warm-up system does not operate
Trouble

• Automatic warm-up system does not operate.

• When the engine coolant temperature is below 30°C, the automatic warm-up system raises the engine
Related speed to 1,200 rpm.
information • If the fuel control dial is opened more than 70% for 3 seconds when the starting switch is turned ON or
after the engine is started, the automatic warm-up system is turned OFF.
Possible causes Defective engine coolant
1
and standard temperature sensor system
value in normal
state
Defective governor and
2
pump controller
PC130-7
Cause Standard value in normal state/Remarks on troubleshooting
aTurn starting switch ON and carry out troubleshooting (monitoring).
Monitoring code
If the display on the monitor panel is abnormal, carry out troubleshooting
for E-16.
Troubleshooting cannot be carried out since the defect is in the gover-
nor and pump controller (If none of the above causes is the cause of the
trouble, the governor and pump controller is defective).
Item
Engine coolant
041 temperature sensor
voltage (Unit: 10 mV)
E-6
Normal display
Approx. 480 – 440
(Coolant temperature:
0 – 30 °C)
20-415
(1)