40 Troubleshooting SEN04120-03
PC130-8
17
Failure code [CA488] Chg air temp high torque derate 1
User code Failure code
Trouble
Charge air temperature high torque derate
(Engine controller system)
E11 CA488
Contents of
trouble
• Temperature signal of boost pressure/temperature sensor exceeded control upper temperature
limit.
Action of
controller
• Limits output and continues operation.
Problem that
appears on
machine
• Engine output lowers.
Related
information
• Boost temperature can be checked with monitoring function. (Code: 18500 Boost temperature)
• Method of reproducing failure code: Start engine.
Possible causes
and standard
value in normal
state
Cause Standard value in normal state/Remarks on troubleshooting
1
Lowering of cooling perfor-
mance of aftercooler
Cooling performance of aftercooler may be low. Check following
points directly.
• Looseness and breakage of fan belt.
• Insufficiency of cooling air
• Clogging of aftercooler fins
2
Abnormal rise of turbo-
charger outlet temperature
Outlet temperature of turbocharger may be abnormally high.
Check related parts directly.
3 Defective engine controller
If causes 1 – 2 are not detected, engine controller may be defec-
tive. (Since trouble is in system, troubleshooting cannot be carried
out.)
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