Power Maximizing Function Does Not Operate - Komatsu ecot3 PC300LC-8 Shop Manual

SEN02632-02
E-6 Power maximizing function does not operate
Trouble • Power maximizing function does not work.
• Symbol mark is indicated on the machine monitor when the power maximizing switch is depressed
Related infor- during work equipment operation while the engine is running in P- or E-mode.
mation • Input state of power maximizing switch (left knob switch) can be checked with monitoring function
(Code 02200: Switch Input 1)
1 Defective fuse No. 3
Defective power maximizing
2 switch (Internal disconnec-
tion)
Disconnection in wiring har-
ness
3 (Disconnection in wiring or
Possible causes
defective contact in connec-
and standard
tor)
value in normal
state
Ground fault in wiring har-
ness
4
(Short circuit with GND cir-
cuit)
5 Defective pump controller
Circuit diagram related to power max. switch
18
Cause Standard value in normal state/Remarks on troubleshooting
If fuse is burnt out, the circuit probably has ground fault.
a
Between (1) – (2)
a
Wiring harness between F01-9 outlet – S11
(female) (1)
Wiring harness between S11 (female) (2) –
CP01 (female) (41)
a
Wiring harness between F01-9 outlet – S11
(female) (1) and chassis ground
Wiring harness between S11 (female) (2) –
CP01 (female) (41) and chassis ground
a
Between (41) –
chassis ground
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
S11(male) Switch
Released
Pressed
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
CP01 Switch
Released
Pressed
40 Troubleshooting
1
Resistance
Min. 1 Mz
Max. 1 z
Resis-
Max. 1 z
tance
Resis-
Max. 1 z
tance
Resis-
Min. 1 Mz
tance
Resis-
Min. 1 Mz
tance
Voltage
Max. 1 V
20 – 30 V
PC300, 350-8