Table of Contents
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UEN00242-01
Failure code [DHS3MA] Arm Curl PPC Press Sensor Abnormality
User code
Failure code
—
DHS3MA
Contents of
• Signal voltage of arm curl PPC pressure sensor circuit is below 0.3 V or above 4.5 V.
trouble
Action of
• Fixes arm curl PPC pressure at 0 MPa {0 kg/cm
controller
• If cause of failure disappears, system resets itself.
Problem that
• Automatic decelerator cannot be reset.
appears on
• Arm curl performance lowers.
machine
a If 5V circuit (3) and ground circuit (1) of pressure sensor are connected inversely, pressure sensor
will be broken. Accordingly, take extreme care when checking.
Related infor-
• Arm curl PPC pressure can be checked with monitoring function.
mation
(Code: 07200 Arm curl PPC pressure)
• Method of reproducing failure code: Turn starting switch ON or start engine.
Defective 5V sensor power
1
supply 1 system
Defective arm curl PPC pres-
2
sure sensor (Internal defect)
Possible causes
and standard
Disconnection in wiring har-
value in normal
ness (Disconnection in wiring
3
state
or defective contact in con-
nector)
Ground fault in wiring har-
4
ness (Short circuit with GND
circuit)
Hot short (Short circuit with
5
24V circuit) in wiring harness
6 Defective pump controller
16
Arm curl PPC pressure sensor abnormality
Trouble
(Pump controller system)
Cause
If failure code [DA25KP] is also displayed, carry out troubleshooting
for it first.
a Prepare with starting switch OFF, then turn starting switch ON or
Between (3) – (1)
Between (2) – (1)
If voltage is abnormal, replace arm curl PPC pressure sensor with
another PPC pressure sensor and check failure code. (If "E" of fail-
ure code goes off at this time, arm curl PPC pressure sensor is
defective.)
a Prepare with starting switch OFF, then carry out troubleshooting
Wiring harness between C01 (female) (18) –
P04 (female) (1)
Wiring harness between C01 (female) (17) –
P04 (female) (2)
Wiring harness between C01 (female) (9) –
J06 – P04 (female) (3)
a Prepare with starting switch OFF, then carry out troubleshooting
Wiring harness between C01 (female) (17) –
P04 (female) (2)
a Prepare with starting switch OFF, then turn starting switch ON
Wiring harness between C01 (female) (17) –
P04 (female) (2)
If causes 1 – 5 are not detected, pump controller may be defective.
(Since trouble is in system, troubleshooting cannot be carried out.)
2
} and continues control.
Standard value in normal state/Remarks on troubleshooting
start engine and carry out troubleshooting in each case.
P04
Power supply
without turning starting switch ON.
without turning starting switch ON.
and carry out troubleshooting.
40 Troubleshooting
Voltage
4.5 – 5.5 V
Signal
0.3 – 4.5 V
Resis-
tance
Resis-
tance
Resis-
tance
Resis-
tance
Voltage
PC210, 230, 240-8
1
Max. 1 z
Max. 1 z
Max. 1 z
Min. 1 Mz
Max. 1 V
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Table of Contents
Troubleshooting
Need help?
Do you have a question about the PC210-8 and is the answer not in the manual?
Questions and answers
E03 Dw45KB
E11(CA331)
Komastu pc210 not starting after changing injectors and fuel pump and common rail
The Komatsu PC210-8 may not be starting after changing the injectors, fuel pump, and common rail due to the following possible reasons:
1. Residual Fuel Pressure: The common rail fuel injection system requires the residual fuel pressure to be fully released before working on the fuel system. If this step was not followed, it may cause issues with fuel delivery.
2. Defective Electrical System: If the electrical system is not functioning properly, the engine may not receive the necessary signals for fuel injection timing.
3. Insufficient Fuel Supply: There might be an issue with fuel delivery, such as clogged filters, air trapped in the fuel lines, or improper priming of the fuel system after component replacement.
4. Insufficient Air Intake: A clogged air cleaner may restrict airflow, preventing proper combustion.
5. Improper Fuel Selection: Using incorrect fuel or contaminated fuel can affect engine starting performance.
Additionally, the common rail system requires the crankshaft to rotate up to two full turns before the engine starts, which is a normal operation characteristic. Checking for failure codes like [CA559] and [CA2249] can help diagnose the issue further.
This answer is automatically generated
engine overheating
To fix engine overheating issues in a Komatsu PC210-8, follow these steps:
1. Check Coolant Levels – Ensure the radiator and coolant reservoir have the correct amount of coolant.
2. Inspect the Radiator – Clean any debris blocking airflow and check for leaks.
3. Examine the Cooling Fan – Verify that the fan is functioning properly and is not damaged.
4. Inspect the Water Pump – Ensure the water pump is circulating coolant correctly.
5. Check the Thermostat – Replace if it is stuck closed.
6. Inspect Hoses – Look for any leaks, cracks, or blockages in the hoses.
7. Examine the Hydraulic Oil Cooler – Clean or replace if clogged.
8. Check Engine Load – Avoid excessive loads that may cause overheating.
9. Inspect the Aftercooler – Clean or replace if necessary.
10. Verify Fuel Injector Operation – Malfunctioning injectors can lead to overheating.
If overheating persists after these checks, consider professional inspection and repair.
This answer is automatically generated