Komatsu PC200-8M0, Shop Manual, Page: 843 / 1254

SEN06138-00
PC200, 200LC, 220, 220LC-8M0 40-400
21
400 Troubleshooting of electrical system (E-mode)
E-5 Precaution monitor lights up while engine is running
E-5 Precaution monitor lights up while engine is running
Failure 1) Engine coolant temperature monitor lights up in white.
Related information
q
Signal of engine coolant temperature sensor is input to engine controller and then data is
transmitted 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
Insufficient warm-up of machine
(when system works properly)
If monitor lights up in white, engine coolant temperature may be low (below
approximately 30 °C). Warm up engine.
q Lighting up in white: Engine coolant temperature is low.
q
Lighting up in blue: Engine coolant temperature is proper.
2
Defective engine coolant tempera-
ture gauge system
If no failure is found by check on cause 1, engine coolant temperature gauge
system 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 white.
Related information
q
Signal of hydraulic oil temperature sensor is input to pump controller and then data is trans-
mitted 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
Insufficient warm-up of machine
(when system works properly)
If monitor lights up in white, hydraulic oil temperature may be low (below
approximately 20 °C). Warm up engine.
q
Lighting up in white: Hydraulic oil temperature is low.
q
Lighting up in blue: Hydraulic oil temperature is proper.
2
Defective hydraulic oil temperature
gauge system
If no failure is found by check on cause 1, hydraulic oil temperature gauge sys-
tem may be defective. Perform troubleshooting for "E-9 hydraulic oil tempera-
ture gauge does not indicate properly".
Failure 3) Charge level monitor lights up while engine is running.
Related information
q
Power generation signal of alternator can be checked with monitoring function.
(Code: 04300 Charge voltage)
Cause Procedure, measuring location, criteria and remarks
1 Defective alternator system Perform troubleshooting for failure code [ AB00KE ].
Failure 4) Fuel level monitor lights up in red.
Related information
q
Signal voltage of fuel level sensor can be checked with monitoring function.
(Code: 04200 Fuel sensor voltage)
Cause Procedure, measuring location, criteria and remarks
1
Low fuel level (when system works
properly)
Fuel level may be low. Check it and add fuel if necessary.
2 Defective fuel level gauge system
If no failure is found by check on cause 1, fuel level gauge system may be
defective. Perform troubleshooting for "E-7 Fuel level gauge does not indicate
properly".