Komatsu PC200-8M0, Shop Manual, Page: 845 / 1254

SEN06138-00
PC200, 200LC, 220, 220LC-8M0 40-400
23
400 Troubleshooting of electrical system (E-mode)
E-6 Emergency stop monitor lights up while engine is running
E-6 Emergency stop monitor lights up while engine is running
Failure 1) Engine coolant temperature monitor lights up in red.
Related infor-
mation
q Signal of engine coolant temperature sensor is input to engine controller and then data is trans-
mitted to machine monitor through CAN communication system.
q Engine coolant temperature can be checked with monitoring function
(Code: 04107 Engine coolant temperature)
Cause Procedure, measuring location, criteria and remarks
1
Overheating of engine cool-
ant (when system works
properly)
If monitor lights up in red, engine coolant temperature may be high (above approxi-
mately 102 °C). Cool down engine coolant (run engine at low idle).
q Lighting up in red: Engine coolant temperature is high (overheating).
q
Lighting up in blue: Engine coolant temperature is proper.
Perform troubleshooting for "S-14 Coolant temperature becomes too high (over-
heating)".
2
Defective engine coolant
temperature gauge system
If no failure is found by check on cause 1, engine coolant temperature gauge sys-
tem may be defective. Perform troubleshooting for "E-8 Engine coolant temperature
gauge does not indicate properly".
Failure 2) Hydraulic oil temperature monitor lights up in red.
Related infor-
mation
q Signal of hydraulic oil temperature sensor is input to pump controller and then the data is transmit-
ted to machine monitor through CAN communication system.
q Hydraulic oil temperature can be checked with monitoring function
(Code: 04401 Hydraulic oil temperature)
Cause Procedure, measuring location, criteria and remarks
1
Overheating of hydraulic oil
(when system works prop-
erly)
If monitor lights up in red, hydraulic oil temperature may be high (above approxi-
mately 102 °C). Cool down hydraulic oil (run engine at low idle or stop engine).
q Lighting up in red: Hydraulic oil temperature is high (overheating).
q
Lighting up in blue: Hydraulic oil temperature is proper.
2
Defective hydraulic oil tem-
perature gauge system
If no failure is found by check on cause 1, hydraulic oil temperature gauge system
may be defective. Perform troubleshooting for "E-9 hydraulic oil temperature gauge
does not indicate properly".
Failure 3) Engine oil pressure monitor lights up in red.
Related infor-
mation
q
Signal of engine oil pressure switch is input to engine controller. If engine oil pressure switch is
turned ON while engine is running, failure code [
B@BAZG ] is transmitted from engine controller
to machine monitor through CAN communication.
Cause Procedure, measuring location, criteria and remarks
1
Low engine oil pressure
(when system works prop-
erly)
Engine oil pressure may be low. Check it. If it is low, perform troubleshooting for
"S-12 Oil pressure decreases".
2
Defective engine oil pres-
sure switch system If no failure is found by check on cause 1, engine oil pressure switch system may be
defective. Perform troubleshooting for failure code [
CA435 ].