Code [553/Ca553] Rail Press. High Error 1 - Komatsu 114E-3 Series Shop Manual

40 Troubleshooting
E-42 Code [553/CA553] Rail Press. High Error 1
Error code Failure code
553
Contents of
• Voltage (1) in common rail circuit is abnormally high.
trouble
Action of con-
• None in particular.
troller
Problem that
• Engine sound becomes larger under no load or light load.
appears on
• Engine output drops.
machine
Related infor-
• Method of reproducing failure code: Start engine.
mation
1 Defective related system
Possible causes
and standard
Defective connection of
2
value in normal
ground terminal
state
Broken O-ring of supply
3
pump actuator
114E-3 Series
Trouble
CA553
Causes
Abnormally high level in common rail pressure sensor 1
Standard value in normal state/Remarks on troubleshooting
If another failure code is indicated, 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.
SEN00460-01
1
29