Failure Code [Ca757] All Persistent Data Lost Error - Komatsu ecot3 PC300LC-8 Shop Manual

SEN02630-05

Failure code [CA757] All Persistent Data Lost Error

Action code Failure code
E10
Contents of
• All data in engine controller are lost.
trouble
Action of con-
• None in particular.
troller
Problem that
• Engine may stop and may not be started again.
appears on
• Monitoring function of machine monitor (engine controller system) may not work normally.
machine
Related infor-
• Method of reproducing failure code: Turn starting switch ON.
mation
1 Defect in related system
Looseness or corrosion of
2
battery terminal
3 Defective battery voltage
4 Defective fuse No. 19
Defective relay for engine
5
controller power supply
Possible causes
and standard
value in normal
state
Disconnection in wiring har-
ness
6 (Disconnection in wiring or
defective contact in connec-
tor)
Defective wiring harness
7
connector
8 Defective engine controller
36
Trouble
CA757
Cause
All persistent data lost error
(Engine controller system)
Standard value in normal state/Remarks on troubleshooting
If another failure code is displayed, carry out troubleshooting for it
first.
Battery terminal may be loosened or corroded. Check it directly.
a
Prepare with starting switch OFF, then keep starting switch
OFF and turn it to START and carry out troubleshooting in
each case.
Battery (1 piece)
Between (+) – (–) ter-
minals
If fuse is broken, circuit probably has ground fault.
a
Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
Replace relay (R23, R24) for engine controller with another relay
and perform reproducing operation. If "E" of failure code goes off at
this time, replaced relay is defective.
a
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between F01-19 – R23, R24
(female) (3)
Wiring harness between R23, R24 (female)
(5) – CE03 (female) (3)
Wiring harness between CE03 (female) (1) –
chassis ground (T11)
Connecting parts between fuse No. 19 – machine wiring harness –
engine controller may be defective. Check them directly.
• Looseness of connector, breakage of lock, or breakage of seal
• Corrosion, bend, breakage, push-in, or expansion of pin
• Moisture or dirt in connector or defective insulation
a
Prepare with starting switch OFF, then turn starting switch ON
and start engine and carry out troubleshooting in each case.
CE03 (female)
Between (3) – (1)
40 Troubleshooting
Starting switch
OFF Min. 12 V
START Min. 6.2 V
Resis-
tance
Resis-
tance
Resis-
tance
Starting switch
ON Min. 24 V
START Min. 12 V
PC300, 350-8
1
Voltage
Max. 10 z
Max. 10 z
Max. 10 z
Voltage