Before Carrying Out Troubleshooting Of Electrical System - Komatsu PC210-8 Shop Manual

40 Troubleshooting
(For PC210 K50001-K51094, PC230 K50001-K50113 and PC240 K50001-K50303).
Troubleshooting of electrical system (E-mode)

Before carrying out troubleshooting of electrical system

Connection table of fuse box
a This connection table shows the devices to which each power supply of the fuse box supplies power (A
switch power supply is a device which supplies power while the starting switch is in the ON position and
a constant power supply is a device which supplies power while the starting switch is in the OFF and ON
positions).
a When carrying out troubleshooting related to the electrical system, you should check the fuses and fusi-
ble links to see if the power is supplied normally.
Type of
power Fusible link
supply
Switch power F04
supply (65 A)
Switch power F04
supply (65 A)
Switch power F04
supply (65 A)
Constant F05
power supply (30 A)
Switch power Starting switch
supply ACC
PC210, 230, 240-8
Fuse
Fuse No.
capacity
1 10 A
2 30 A
3 10 A
4 10 A
5 10 A
6 10 A
7 10 A
8 25 A
9 10 A
10 10 A
11 20 A
12 20 A
13 20 A
14 10 A
15 20 A
16 10 A
17 20 A
18 10 A
19 30 A
20 5 A
Destination of power
Lamp relay
PC-EPC (F) solenoid valve, PC-EPC (R) solenoid valve
[When pump drive switch is operated in emergency]
Swing holding brake solenoid valve
[When swing holding brake release switch is operated]
Pump controller (Solenoid power supply)
PPC oil pressure lock solenoid valve
Starting motor cut-out relay (PPC lock)
Starting motor cut-out relay (Personal code)
Cigarette lighter
Windshield washer motor
Horn relay, horn
Lower wiper
Beacon
Working lamp (Front and boom)
Radio, speaker
Left knob switch (pump controller input)
Refuel pump
Air conditioner unit
Air conditioner compressor electromagnetic clutch
Cab lamp (rear), rear worklamp lamp relay
Cab lamp (headlamp)
Optional power supply (1)
Travel alarm, heated seat, 12v power port
Optional power supply (2)
Radio (backup power supply)
Room lamp
Starting switch
Machine monitor
Pump controller
(Spare)
Engine controller
Engine controller (ACC signal)
UEN00244-02
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