Failure Code [Ca111] Ecm Critical Internal Failure; Failure Code [Ca115] Eng Ne And Bkup Speed Sens Error - Komatsu PC200-8M0 Shop Manual

301 Troubleshooting by failure code, Part 1

Failure code [CA111] ECM Critical Internal Failure

Failure code [CA111] ECM Critical Internal Failure

Action
Failure code
level
L04 CA111
q
Detail of failure Memory or power supply circuit in engine controller is defective.
Action of con-
q
None in particular
troller
Problem on
q
Engine may stop during operation or may not be able to start.
machine
q Power supply voltage to engine controller can be checked with monitoring function.
Related infor-
(Code: 03203 Battery voltage)
mation
q
Method of reproducing failure code: Start engine.
Cause
1 Defect in related system
2 Perform troubleshooting for failure code [CA441].

Failure code [CA115] Eng Ne and Bkup Speed Sens Error

Action
Failure code
level
L04 CA115
q
Detail of failure Signals from both engine Ne and Bkup speed sensors are abnormal.
Action of con-
q
None in particular
troller
q
Problem on Engine stops.
q
machine Engine does not start
Related infor-
q
Method of reproducing failure code: Start engine.
mation
Cause
Defective connection of sensor
1
connector
2 Defective Ne speed sensor system
Defective Bkup speed sensor sys-
3
tem
4 Defective engine controller
PC200, 200LC, 220, 220LC-8M0
Engine Controller Module Critical Internal Failure
Failure
(Engine controller system)
Procedure, measuring location, criteria and remarks
If another failure code is displayed, perform troubleshooting for it.
Engine Ne and Bkup speed sensor Error
Failure
(Engine controller system)
Procedure, measuring location, criteria and remarks
Connectors of Ne speed sensor and Bkup speed sensor may be connected
defectively (wrong connection). Check them.
Perform troubleshooting for troubleshooting Nos. 1 to 10 of failure code
[CA689].
Perform troubleshooting for failure code [CA778].
If no failure is found by above checks, engine controller is defective. (Since
this is an internal defect, troubleshooting cannot be performed.)
SEN06133-00
19
40-301