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