Failure Code [Ca553] Common Rail Pressure High Error 1 - Komatsu WA250-6 Shop Manual

330 Troubleshooting by failure code (Display of code), Part 3

Failure code [CA553] Common rail pressure high error 1

Failure code [CA553] Common rail pressure high error 1
Action code Failure code
E03
Contents of
• Voltage (1) in common rail circuit is abnormally high.
trouble
Action of • None in particular.
controller
• Turns the centralized warning lamp and alarm buzzer ON.
Problem that
• Engine sound becomes larger under no load or light load.
appears on
• Engine output drops.
machine
• The input state (common rail pressure) from the common rail pressure sensor can be checked with
the monitoring function (Code: ENGINE, 36400, RAIL PRESS).
Related
• The input state (voltage) from the common rail pressure sensor can be checked with the monitoring
information
function (Code: ENGINE, 36402, RAIL PRESS).
• Method of reproducing failure code: Start engine
1 Defect in related system
Possible causes
and standard
Defective connection of
2
value in normal
ground terminal
state
Broken O-ring of supply
3
pump actuator
WA250, 250PZ-6
Trouble
CA553
Causes
Common rail pressure high error 1
(Engine controller system)
Standard value in normal state/Remarks on troubleshooting
If another code is displayed, carry out troubleshooting for it.
Inspect following directly for connection of ground terminal.
• Ground terminal (battery (-)) of machine main unit.
• Ground terminal of engine
• Ground terminal of engine controller
• Ground terminal of starting motor
Inspect O-ring directly for breakage.
SEN03843-00
1
29
40-330