Failure Code [Ca488] Chg Air Temp High Torque Derate - Komatsu PC200-8M0 Shop Manual

SEN06134-00

Failure code [CA488] Chg Air Temp High Torque Derate

Action
Failure code
level
L03 CA488
q
Temperature signal from boost pressure & temperature sensor exceeds upper limit of temperature
Detail of failure
control.
Action of con-
q Restricts engine output and allows engine to run.
troller
Problem on
q
Engine output lowers.
machine
q
Boost temperature can be checked with monitoring function.
Related infor-
(Code 18500: Boost temperature)
mation
q
Method of reproducing failure code: Start engine.
Cause
Lowered cooling performance of
1
aftercooler
Abnormal rise of turbocharger out-
2
let temperature
Defective boost temperature sen-
3
sor
36
40-302

Failure code [CA488] Chg Air Temp High Torque Derate

Charge air temperature high torque derate
Failure
(Engine controller system)
Procedure, measuring location, criteria and remarks
Cooling performance of aftercooler may degrade. Check following points:
q
Looseness and damage of fan belt
q
Insufficient cooling air
q
Clogging of aftercooler fins
Outlet temperature of turbocharger may be abnormally high. Check related
parts.
Perform troubleshooting for failure codes [CA153] and [CA154].
302 Troubleshooting by failure code, Part 2
PC200, 200LC, 220, 220LC-8M0