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SEN04119-01
Failure code [CA154] Charge air temp. sensor low error
User code
Failure code
E15
Contents of
• Low voltage was detected in charge (boost) temperature sensor circuit.
trouble
Action of
• Fixes charge (boost) temperature (intake air temperature) (70°C) and continues operation.
controller
Problem that
appears on
machine
• Signal voltage of charge (boost) temperature sensor can be checked with monitoring function.
Related
(Code: 18501 Boost temperature sensor voltage)
information
• Method of reproducing failure code: Turn starting switch ON.
Possible causes
and standard
value in normal
state
Failure code [CA155] Chg air temp high speed derate
User code
Failure code
E11
Contents of
• Temperature signal of charge (boost) pressure/temperature sensor exceeded control upper temper-
trouble
ature limit.
Action of
• Limits output and continues operation.
controller
Problem that
• Engine output lowers.
appears on
• Engine stops.
machine
• Charge (boost) temperature can be checked with monitoring function. (Code: 18500 Boost temper-
Related
ature)
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
34
Trouble
CA154
Cause
Carry out troubleshooting failure code [CA153].
Trouble
CA155
Cause
Charge air temp. sensor low error
(Engine controller system)
Standard value in normal state/Remarks on troubleshooting
Charge air temperature high speed 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.)
40 Troubleshooting
1
1
PC130-8
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Table of Contents
Troubleshooting
