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4 -4
1. POWER CIRCUIT (up to #0179)The negative terminal of battery is grounded to the machine chassis through master switch.When the start switch is in the OFF position, the current flows from the positive battery terminal as shownbelow.
OPERATING FLOWBattery Battery relay Reset button[CS-61]
Fuse box [No.1] I/conn [CN-8(12)] Start switch [CS-2(1)]Power relay [CR-35(30)]
Fuse box [No.2] I/conn [CN-10(6)] Room lamp [CL-1(2)] Door switch[CS-1]Cassette radio [CN-27(11)]
Fuse box [No.3] I/conn [CN-11(4)] AC&Heater controller [CN-116(3,4)]Fuse box [No.4] I/conn [CN - 5(4)] I/conn [CN -17(5)] Wiper motor Controller
[CN-141(7)]Wiper motor [CN-21(4)]
Fuse box [No.5] CPU controller [CN-50(7)]Fuse box [No.6] I/conn [CN-11(5)] Relay(Hi, M2)
Engine Start switch Check point Voltage
1)
¡ GND : Ground
OFF OFF
- GND (Battery 1 EA)
- GND (Battery 2 EA)
- GND (Battery 2 EA)
- GND (Reset button)
10~12.5V
20~25V
20~25V
20~25V
2) CHECK POINT
I/conn : Intermediate connector
4 -5-1
1. POWER CIRCUIT (from #0180 to #1000)The negative terminal of battery is grounded to the machine chassis through master switch.When the start switch is in the OFF position, the current flows from the positive battery terminal asshown below.
OPERATING FLOWBattery Battery relay Fusible link ¡†CN-60¡‡
Fuse box ¡†No.1¡‡ l/conn¡†CN-8(12)¡‡ Start switch ¡†CS-2(1)¡‡Power relay ¡†CR-35(30)]
Fuse box ¡†No.2¡‡ I/conn¡†CN-10(6)¡‡ Room lamp ¡†CL-1(2)¡‡ Door switch ¡†CS-1¡‡Cassette radio ¡†CN-27(11)¡‡
Fuse box ¡†No.3¡‡ l/conn¡†CN-11(4)¡‡ AC & Heater controller ¡†CN -116(3, 4)¡‡Fuse box ¡†No.4¡‡ I/conn¡†CN - 5(4)¡‡ I/conn¡†CN -17(5)¡‡ Wiper motor controller
¡†CN-141(7)¡‡Wiper motor ¡†CN-21(4)¡‡
Fuse box ¡†No.5¡‡ CPU controller ¡†CN-50(7)¡‡Fuse box ¡†No.6¡‡ I/conn¡†CN-11(5)¡‡ Relay(Hi, M2)
¡ I/conn : Intermediate connector
CHECK POINT
Engine Start switch Check point Voltage
1)
2)
¡ GND : Ground
OFF OFF
¤ - GND (Battery 1EA)
¤Ł- GND (Battery 2EA)
¤Ø- GND (Battery 2EA)
¤Œ - GND (Fusible link)
10~12.5V
20~25V
20~25V
20~25V
2. STARTING CIRCUIT(up to #1000)
OPERATING FLOWBattery(+) terminal Battery relay[CR-1] Reset button[CS-61] Fuse box [No.1]
I/conn [CN-8(12)] Start key [CS-2(1)]
¡ Start switch : ONStart switch ON [CS-2(2)] I/conn [CN-8(11)] Diode[DO-2]Battery relay [CR-1]:Battery relay operating(All power is supplied with the electric component)Start switch ON [CS-2(3)] I/conn [CN-8(10)] Power relay [CR-35(86)¡ (87)]
Fuse box [No.12] I/conn [CN-1(5)] Fuel cut-off [CN-79(1)]
¡ Start switch : START Start switch START[CS-2(5)] I/conn[CN-8(9)] Safety relay [CR-5(86) ¡ (30)]
I/conn [CN-3(4)] Start relay [CR-23]I/conn [CN-1(4)] Fuel cut off [CN-79(2)]
4 -6
Engine Start switch Check point Voltage
¤ -GND (Battery)
¤ Ł -GND (Start key)
¤ Ø -GND (Battery relay M4)
Operating Start ¤ Œ -GND (Starter B ) 20 ~ 25V
¤ º -GND (Starter M)
¤ -GND (Start relay)
¤ -GND (Battery relay M8)
1)
2) CHECK POINT
¡ GND : Ground
3. CHARGING CIRCUIT(up to #1000)When the starter is activated and the engine is started, the operator releases the key switch to the ONposition.Charging current generated by operating alternator flows into the battery through the Batteryrelay(CR-1).The current also flows from alternator to each electrical component and controller through the fusebox.
OPERATING FLOW
Warning flowAlternator¡ I¡–terminal I/conn ¡†CN-3(6)¡‡ CPU Controller [CN-51(9)]Cluster warning lamp (Via serial interface)
Charging flowAlternator "B+" terminal Battery relay(M8) Battery(+) terminal
Reset button[CS-61] Fuse box
4 -8
Engine Start switch Check point Voltage
¤ - GND (Battery voltage)
¤Ł- GND (Battery relay)
ON ON ¤Ø- GND (Alternator B¡qterminal) 20~27V
¤Œ- GND (Alternator I terminal)
¤º- GND (CPU)
1)
2)
(1)
(2)
CHECK POINT
¡ GND : Ground
4 -10
4. HEAD LAMP CIRCUIT(up to #1000)
OPERATING FLOWFuse box (No.14) I/conn [CN-7(7)] Switch panel [CN-116(9)]
¡ When lamp switch ONSwitch panel [CN-116(1)] I/conn [CN-7(1)]
I/conn [CN-10(2)] Cassette radio illumination [CN-27(7)]I/conn [CN-11(8)] AC & Heater controller illumination [CN-116(5)]Head lamp [CL-4(2)] : Head lamp ONI/conn[CN-6(8)] Cigarlight [CL-2]
Engine Key switch Check point Voltage
¤ - GND (Fuse box)
¤Ł- GND (Switch power input)
¤Ø- GND (Switch power output)
1)
2) CHECK POINT
¡ GND : Ground
STOP ON 20~25V
4 -12
5. WORK LAMP CIRCUIT(up to #1000)
OPERATING FLOWFuse box (No.15) I/conn [CN-7(8)] Switch panel [CN-116(10,11)]
¡ When work lamp switch ONWork lamp switch ON [CN-116(2,3)] I/conn [CN-7(2)] I/conn [CN-12(1)]
Work lamp ON [CL-5(2), CL-6(2)]
Engine Key switch Check point Voltage
¤ - GND (Fuse box)
¤Ł- GND (Switch power input)
¤Ø- GND (Switch power output)
¤Œ- GND (Work lamp)
1)
2) CHECK POINT
¡ GND : Ground
STOP ON 20~25V
4 -14
6. CAB LAMP CIRCUIT(up to #1000)
OPERATING FLOWFuse box (No.16) I/conn ¡†CN-7(12)¡‡ Switch panel [CN-116(16,17)]
¡ When Lamp switch ONLamp switch ON [CN-116(7, 8)] I/conn [CN-7(6)] I/conn [CN-10(11)] Cab light ON [CL-8(2), CL-9(2)]
1)
2) CHECK POINT
Engine Start switch VoltageCheck point
- GND (Fuse box)
- GND (Switch power input)
- GND (Switch power output)
- GND (Cab lamp)
STOP ON 20 ~ 25V
GND : Ground
4 -15
2
1
2
1
CABIN LIGHT
CL-9
CL-8
AC
& H
EA
TE
R
CP
U5
5A
27
10A
26
10A
25
10A
24
5A
23
10A
22
5A
21
10A
20
10A
19
10A
18
20A
17
5A
16
10A
15
10A
14
5A
13
20A
12
20A
11
5A
10
5A
9
10A
8
5A
7
10A
6
20A
4
10A
3
5A
2
5A
1
20A
FUSE BOX
CN
-46
SP
AR
E
FU
EL
FIL
LER
P/P
SO
LEN
OID
3
SA
FE
TY
SO
L
SO
LEN
OID
1
TR
AV
EL
ET
HE
R(P
RE
-HE
AT
)
CIG
AR
LIG
HT
ER
HO
RN
AC
& H
EA
TE
R
BE
AC
ON
LA
MP
CA
BIN
LA
MP
WO
RK
LA
MP
HE
AD
LA
MP
WIP
ER
MO
TO
R
SW
ITC
H P
AN
EL
CO
NV
ER
TO
R
CP
U
FU
EL
CU
T-O
FF
CLU
ST
ER
CA
SS
ET
TE
RA
DIO
WIP
ER
AC
& H
EA
TE
R
RO
OM
LA
MP
ST
AR
T K
EY
CN-7
CA
BIN
LIG
HT
24V
CA
BIN
LIG
HT
24V
INT
. SIG
TR
AV
EL
ALA
RM
GN
D
WA
SH
ER
SIG
WO
RK
LIG
HT
24V
WO
RK
LIG
HT
24V
HE
AD
LIH
GT
24V
CA
BIN
LIG
HT
OU
T
CA
BIN
LIG
HT
OU
T
PO
WE
R 2
4V
PR
E-H
EA
T
WIP
ER
MO
TO
R D
RIV
E
WO
RK
LIG
HT
OU
T
WO
RK
LIG
HT
OU
T
HE
AD
LIG
HT
OU
T
1716151413121110
987654321
CN
-116
SWITCH PANEL
12
11
10
9
8
7
6
5
4
3
2
1
12
11
10
9
8
CN-10
7
6
5
4
3
2
1
1
23
4
R
R
R
OROR
ROR
OROR
OR
OR
CAB LAMP CIRCUIT(up to #1000)
21074EL09
4 -16
7. BEACON LAMP CIRCUIT(up to #1000)
OPERATING FLOWFuse box (No.17) I/conn [CN-8(3)] Beacon lamp switch [CN-23(6)]
¡ When lamp switch ONBeacon lamp switch ON [CS-23(2)] Switch lndicator lamp ON [CS-23(9)]
l/conn [CN-8(4)] l/conn [CN-10(10)]Beacon lamp ON [CL-7]
CHECK POINT
1)
2)
¡ GND : Ground
Engine Start switch Check point Voltage
STOP ON
¤ - GND(Fuse box)
¤Ł- GND(Switch power input)
¤Ø- GND(Switch power output)
¤Œ- GND(Beacon lamp)
20~25V
4 -17
ST
AR
T K
EY
RO
OM
LA
MP
AC
& H
EA
TE
R
WIP
ER
+
CA
SS
ET
TE
RA
DIO
CLU
ST
ER
CP
U
CO
NV
ER
TO
R
SW
ITC
H P
AN
EL
FU
EL
CU
T-O
FF
WIP
ER
MO
TO
R
HE
AD
LA
MP
WO
RK
LA
MP
CA
B L
AM
P
BE
AC
ON
LA
MP
AC
& H
EA
TE
R
HO
RN
CIG
AR
LIG
HT
ER
ET
HE
R(P
RE
-HE
AT
)
TR
AV
EL
SO
LEN
OID
1
SO
LEN
OID
3
FU
EL
FIL
LER
PU
MP
SP
AR
E
CN
-46
FU
SE
BO
X
20A
1
5A2
5A3
10A
4
20A
6
10A
7
5A8
10A
9
5A10
5A11
20A
12
20A
13
5A14
10A
15
10A
16
5A17
20A
18
10A
19
10A
20
10A
21
5A22
10A
23
5A24
10A
25
10A
26
10A
27
CP
U B
+5A
5
20A
28
SP
AR
E
SA
FE
TY
SO
LEN
OID
AC
BLO
WE
R
4
1
1 2 3 4 5 6 7
Y
CN
-8
8 9 10 11 121 2 3 4 5 6 7
CN
-10
8 9 10 11 12
Y
B
G
Y
G
CS-23
BEACON LAMP SW
15
9 10
1
2
3
4
5
6
7
8
9
10
26
8
7
GG
BEACON LAMP
G
B
CL-7
M
2
3
6
1 2 3 4 5 6 7
OR
CN
-7
8 9 10 11 12
SWITCH PANEL
CN
-116 1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17
HE
AD
LIG
HT
OU
T
WO
RK
LIG
HT
OU
T
WO
RK
LIG
HT
OU
T
WIP
ER
MO
TO
R D
RIV
E
PR
E-H
EA
T
PO
WE
R 2
4V
CA
BIN
LIG
HT
OU
T
CA
BIN
LIG
HT
OU
T
HE
AD
LIH
GT
24V
WO
RK
LIG
HT
24V
WO
RK
LIG
HT
24V
WA
SH
ER
SIG
GN
D
TR
AV
EL
ALA
RM
INT
. SIG
CA
BIN
LIG
HT
24V
CA
BIN
LIG
HT
24V
R
OR
OR
8
7
RR
R
OR
OR
B
B
OR
1
2
1
2
CAB LIGHT
CAB LIGHT
CL-8
CL-9
5
BEACON LAMP CIRCUIT(up to #1000)
29074EL08
4 -18
8. WIPER AND WASHER CIRCUIT(up to #1000)
OPERATING FLOW
Key switch ONFuse box (No.11) I/conn [CN-7(5)] Switch panel [CN-116(6)]Fuse box (No.4) I/conn [CN-5(4)] I/conn [CN-17(5)] Wiper motor controller [CN-141(7)]
Wiper motor [CN-21(4)]Fuse box (No.13) I/conn [CN-6(5)] l/conn [CN-17(4)] Wiper motor controller [CN-141(6)]
Washer pump [CN-22(2)]
Wipe switch ON : 1st step(Intermittent)Wiper switch ON [CN-116(15)] I/conn[CN-9(4)] I/conn[CN-17(8)]Wiper motor controller [CN-141(10) ¡ (3)] Wiper motor intermittently operating [CN-21(6)]
Wiper switch ON : 2nd step(Low speed)Wiper switch ON [CN-116(4)] I/conn [CN-7(3)] I/conn [CN-6(9)] I/conn[CN-17(2)]Wiper motor controller [CN-141(2) ¡ (4)] Wiper motor operating [CN-21(2)]
Washer switch ON Washer switch ON [CN-116(12)] I/conn [CN-7(9)] I/conn [CN-5(1)] I/conn [CN-17(7)]
Wiper motor controller [CN-141(9) ¡ (8)] I/conn [CN-17(6)] I/conn [CN-6(11)]Washer pump [CN-22(1)] Washer operating.
Fuse box(No.13) I/conn [CN-6(5)] I/conn [CN-17(4)] Wiper motor controller [CN-141(6) ¡ (4)] Wiper motor operating [CN-21(2), Low speed]
Auto parking(When switch OFF)Switch OFF [CN-116(15)] Wiper motor parking position by wiper motor controller
CHECK POINT
1)
(1)
(2)
(3)
(4)
(5)
¡ GND : Ground
2)
Engine Start switch Check point Voltage
STOP ON
¤ - GND(Fuse box)
¤Ł- GND(Switch power input)
¤Ø- GND(Switch power output)
¤Œ- GND(Wiper Power input)
¤º- GND(Wiper power output)
¤ - GND(Wiper motor)
20~25V
4 -20
CN
-50
CN
-51 36
PU
MP
EP
PR
(+)
35N
C
34R
S23
2 (G
ND
)
33R
S23
2 (-
)
32R
S23
2 (+
)
31G
ND
30S
ER
IAL-
RX
29S
ER
IAL-
TX
28G
ND
(M
AIN
)
27N
C
26N
C
25N
C
BO
OM
PR
IOR
ITY
SO
L
BR
AK
E F
AIL
LA
MP
PO
WE
R IG
BA
TT
ER
Y 2
4V(+
)
NC
PA
RK
ING
SW
T/M
OIL
LA
MP
EN
G P
RE
HE
AT
ER
NC
CO
CA
NC
EL
SO
L
HO
UR
-ME
TE
R
AC
CE
L A
CT
(-)
EN
G O
IL F
ILT
ER
SW
PR
E-H
EA
T S
W
TR
AV
EL
SP
EE
D S
OL
OV
ER
LOA
D S
IG
24
NC
2322212019
PO
WE
R M
AX
SO
L
18171615
PU
MP
EP
PR
(-)
14
TR
AV
EL
BU
ZZ
ER
13
MA
X F
LOW
SO
L
AC
CE
L A
CT
(+)
AN
TI-
RE
ST
AR
T R
Y
NC
12111098765432136N
C
35N
C
34H
YD
TE
MP
SE
ND
OR
33W
AT
ER
TE
MP
SE
ND
OR
32P
UM
P P
RO
LIX
SW
31G
ND
(S
EN
SO
R)
30N
C
29A
CC
EL
SW
28T
/M O
IL P
S
27B
RA
KE
FA
IL P
S
26T
AC
HO
SE
NS
OR
(+)
25T
AC
HO
SE
NS
OR
(-)
WO
RK
ING
PS
FU
EL
LEV
EL
SE
NS
OR
PO
T-S
IG
TR
AV
EL
Hi/L
o S
W
AC
CE
L D
IAL
SIG
5V (
PO
T&
DIA
L)
HE
AV
Y L
IFT
SW
GN
D (
PO
T&
DIA
L)
242322212019
TR
AV
EL
ALA
RM
SW
181716A
IR C
LEA
NE
R S
W
PO
WE
R M
AX
SW
BK
T&
AR
M IN
PS
321
6 5
3 1
2
M-
M+
NC
6
5
4
M
3
2
1P+
SIG
P-
AC
& H
EA
TE
R
CP
U5
5A
2712
20A
11
5A
10
5A
9
10A
8
5A
7
10A
6
20A
4
10A
3
5A
2
5A
1
20A
CN
-46
SP
AR
E
SW
ITC
H P
AN
EL
CO
NV
ER
TO
R
CP
U
FU
EL
CU
T-O
FF
CLU
ST
ER
CA
SS
ET
TE
RA
DIO
WIP
ER
AC
& H
EA
TE
R
RO
OM
LA
MP
ST
AR
T K
EY
12
11
10
9
ACCEL ACTUATOR
CN-76
8
CN-9
7
6
5
4
3
2
1
8
CN-5
7
6
5
4
3
2
1
12
11
10
9
8
CN-1
7
6
5
4
3
2
1
CPU CONTROLLER
2
3
1
6
54
T
1
3
4
6
2
5
1
2
3
4
5
6
CS-7
PROLIX SW
rpm
1
2
2
1
CN-75
EPPR V/V
CD-17
TACHO SENSOR
h 2
1
CN-48
HOUR METER
A
B
C
S
+
CN-142
ACCEL DIAL
2
1
CN-47
RESISTOR
-
FUSE BOX
OR
W BB W R B YORLOR
B WOR
V
Y
OR
W
B
B
R
L
OR
WW/OR
OR
OR
OR
W
B
Y
L
W
B
Y
L
W
B
Y
L
Y
L
OR
OR
OR
V
B
OROR
V
B
CONTROLLER CIRCUIT(up to #1000)
21074EL11
4-22
1
1
4-19 ELECTRIC CIRCUIT FOR HYDRAURIC
CN
-50
CN
-51 36
PU
MP
EP
PR
(+)
35N
C
34R
S23
2 (G
ND
)
33R
S23
2 (-
)
32R
S23
2 (+
)
31G
ND
30S
ER
IAL-
RX
29S
ER
IAL-
TX
28G
ND
(M
AIN
)
27N
C
26N
C
25N
C
BO
OM
PR
IOR
ITY
SO
L
BR
AK
E F
AIL
LA
MP
PO
WE
R IG
BA
TT
ER
Y 2
4V(+
)
NC
PA
RK
ING
SW
T/M
OIL
LA
MP
EN
G P
RE
HE
AT
ER
NC
CO
CA
NC
EL
SO
L
HO
UR
-ME
TE
R
AC
CE
L A
CT
(-)
EN
G O
IL F
ILT
ER
SW
PR
E-H
EA
T S
W
TR
AV
EL
SP
EE
D S
OL
OV
ER
LOA
D S
IG
24
NC
2322212019
PO
WE
R M
AX
SO
L
18171615
PU
MP
EP
PR
(-)
14
TR
AV
EL
BU
ZZ
ER
13
MA
X F
LOW
SO
L
AC
CE
L A
CT
(+)
AN
TI-
RE
ST
AR
T R
Y
NC
12111098765432136N
C
35N
C
34H
YD
TE
MP
SE
ND
OR
33W
AT
ER
TE
MP
SE
ND
OR
32P
UM
P P
RO
LIX
SW
31G
ND
(S
EN
SO
R)
30N
C
29A
CC
EL
SW
28T
/M O
IL P
S
27B
RA
KE
FA
IL P
S
26T
AC
HO
SE
NS
OR
(+)
25T
AC
HO
SE
NS
OR
(-)
WO
RK
ING
PS
WA
TE
R L
EV
EL
SW
FU
EL
LEV
EL
SE
NS
OR
24V
(PR
ES
.SE
NS
OR
)
PO
T-S
IG
TR
AV
EL
Hi/L
o S
W
O/T
DE
CE
L S
W
NC
ALT
LE
VE
L
BO
OM
UP
PS
EN
G O
IL P
S
AC
CE
L D
IAL
SIG
5V (
PO
T&
DIA
L)
HE
AV
Y L
IFT
SW
TR
AV
EL
OIL
PS
GN
D (
PO
T&
DIA
L)
24
P1
PR
ES
S S
IG.
2322212019
TR
AV
EL
ALA
RM
SW
18171615
GN
D(P
RE
S.S
EN
SO
R)
14
AIR
CLE
AN
ER
SW
13
PO
WE
R M
AX
SW
P3
PR
ES
S S
IG.
P2
PR
ES
S S
IG.
BK
T&
AR
M IN
PS
121110987654321
2
1
Pa
2
1
2
1
Pa
2
1
2
1
2
1
2
1
2
1
21P
a
21P
a 21 212121
21C
27
10A
26
10A
25
10A
24
5A
23
10A
22
5A
21
EARTH 1
FUSE BOX
CD
-37
CD-31
OVERLOAD PSCN-91
1
2
CN-131 BOOM DOWN EPPR
BOOM DOWN PRESS
GND
SIG
24V3
2
1
CD-32
CD-33
BOOM UP PRESS
GND
SIG
24V3
2
1
6
5
4
3
2
1
CN-14
DO-4
QUICK COUPLING
CN-140
CN-13
1
2
CN-66
BREAKER SOL.
SAFETY SOL
CN-68
CN-81
TRAVEL BZ
2PC
S B
OO
M A
UT
O-I
DLE
PS
CN
-15
CN
-15
2 1
SP
AR
E
FU
EL
FIL
LER
P/P
SO
LEN
OID
3
SA
FE
TY
SO
L
SO
LEN
OID
1
TR
AV
EL
TRAVELPS
CD-6
CD
-7
WORKPS
CN
-133
BOOMPRIORITY1
CN
-137
MAXFLOW
CN
-88
POWERMAX
CN
-70
TRAVEL
CD
-1
HYDTEMP
12
11
10
9
8
CN-7
7
6
5
4
3
2
1
12
11
10
9
8
CN-6
7
6
5
4
3
2
1
8
CN-4
7
6
5
4
3
2
1
CN-2
6
5
4
3
2
1
12
11
10
9
8
7
CN-8
6
5
4
3
2
1
CPU CONTROLLER
21
10A
20
10A
ET
HE
R(P
RE
-HE
AT
)
CIG
AR
LIG
HT
ER
7
86
2
10
9
8
7
6
5
4
3
2
1
109
51
CABIN LIGHT 24V
CABIN LIGHT 24V
INT. SIG
TRAVEL ALARM
GND
WASHER SIG
WORK LIGHT 24V
WORK LIGHT 24V
HEAD LIHGT 24V
CABIN LIGHT OUT
CABIN LIGHT OUT
POWER 24V
PRE-HEAT
WIPER MOTOR DRIVE
WORK LIGHT OUT
WORK LIGHT OUT
HEAD LIGHT OUT
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
2
1
CN-116
SWITCH PANEL
BREAKER SW
CS-27
BREAKER
CS-26
7
86
2
10
9
8
7
6
5
4
3
2
1
109
51
I
CS-52
BOOM DAMPING SW
CS-67
CS-50
QU
ICK
CO
UP
LIN
G S
WO
VE
RLO
AD
SW
2
1
2
1
SAFETY SW
CS-20
A
CB
C
B
A
POWER MAX
CS-19
ONE TOUCH DECEL
CS-29
CS-4
SAFETY SW
CD-44
PUMP1 PRESS
GND
SIG
24V 3
2
1
CD-43
CD-42
PUMP2 PRESS
PUMP3 PRESSGND
SIG
24V 3
2
1
GND
SIG
24V 3
2
1
6
5
4
3
2
1
CN-16
20
10A
HO
RN
10
9
8
7
6
5
4
3
2
10
9
8
7
6
5
4
3
2
7
86
2
109
51
7
86
2
109
51
R OR
RYGY
OR
Y
L
G
B
GY
OR
Y
L/W
G
B
GY
OR
Y
L/W
G
Y
B
B
B
B
LL
L
G
G
GY
OR
OR
Y
B
GY
B
G
OR OR
G
GY
Y
G
GY
Y
WLBR
G RGVB GGY
L VWVBR
WR BY RG GY
Y
RBR
RLRGYW
G
Y
G
R
RR
VV
BB
VW
VV
RR
R
G
W R
G
W
R
B
V
V
R
B
Y
B
YY
B
B
L
B
L
GY
B
GY
OR
GY
OR
GYOR GY
GY
GY
B
G
B
G
B
G
B
W
R
V
BR
B
W
R
V
BR
B
W
R
V
B
W
R
V
B
BR
BR
B
B
R
R
R
G
W
R
G
W
R
G
W
GY
B
YB
YY
R
B
B
B
B
B
ELECTRIC CIRCUIT FOR HYDRAULIC(up to #1000)
21074EL12
4 -54
1. POWER CIRCUIT (#1001 and up, TIER II)The negative terminal of battery is grounded to the machine chassis through master switch.When the start switch is in the OFF position, the current flows from the positive battery terminal asshown below.
OPERATING FLOWBattery Battery relay Fusible link ¡†CN-60¡‡
Fuse box ¡†No.1¡‡ l/conn¡†CN-8(12)¡‡ Start switch ¡†CS-2(1)¡‡Power relay ¡†CR-35(30)]
Fuse box ¡†No.2¡‡ I/conn¡†CN-10(6)¡‡ Room lamp ¡†CL-1(2)¡‡ Door switch ¡†CS-1¡‡Cassette radio ¡†CN-27(11)¡‡
Fuse box ¡†No.3¡‡ l/conn¡†CN-11(4)¡‡ AC & Heater controller ¡†CN -116(3, 4)¡‡Fuse box ¡†No.4¡‡ I/conn¡†CN - 5(4)¡‡ I/conn¡†CN -17(5)¡‡ Wiper motor controller
¡†CN-141(7)¡‡Wiper motor ¡†CN-21(4)¡‡
Fuse box ¡†No.5¡‡ CPU controller ¡†CN-50(7)¡‡Fuse box ¡†No.6¡‡ I/conn¡†CN-11(5)¡‡ Relay(Hi, M2)
¡ I/conn : Intermediate connector
CHECK POINT
Engine Start switch Check point Voltage
1)
2)
¡ GND : Ground
OFF OFF
¤ - GND (Battery 1EA)
¤Ł- GND (Battery 2EA)
¤Ø- GND (Battery 2EA)
¤Œ - GND (Fusible link)
10~12.5V
20~25V
20~25V
20~25V
4 -56
2. STARTING CIRCUIT (#1001 and up, TIER II)
OPERATING FLOWBattery(+) terminal Battery relay¡†CR-1¡‡ Reset button ¡†CS-61¡‡ Fuse box ¡†No.1¡‡
I/conn¡†CN-8(12)¡‡ Start switch ¡†CS-2(1)¡‡
When start key switch is in ON positionStart switch ON ¡†CS-2(2)¡‡ I/conn¡†CN-8(11)¡‡ Battery relay ¡†CR-1¡‡
Battery relay operating (All power is supplied with the electric component)Start switch ON ¡†CS-2(3)¡‡ I/conn¡†CN-8(10)¡‡ Power relay ¡†CR-35(86) ¡ (87)¡‡
Fuse box ¡†No.12¡‡ l/conn¡†CN-2(5)¡‡ Fuel cut-off ¡†CN-79(1)¡‡
When start key switch is in START positionStart switch START ¡†CS-2(5)¡‡ I/conn¡†CN-8(9)¡‡ Safety relay ¡†CR-5(86) ¡ (30)¡‡
l/conn¡†CN-3(2)¡‡ Start relay ¡†CR-23¡‡l/conn¡†CN-2(4)¡‡ Fuel cut off ¡†CN-79(2)¡‡
CHECK POINT
1)
(1)
(2)
2)
Engine Start switch Check point Voltage
OPERATING START
¤ - GND(Battery)
¤Ł- GND(Start key)
¤Ø- GND(Battery relay M4)
¤Œ- GND(Starter B+)
¤º- GND(Starter M)
¤ - GND(Start relay)
¤ - GND(Battery relay M8)
20~25V
¡ GND : Ground
4 -58
CHECK POINT
3. CHARGING CIRCUIT (#1001 and up, TIER II)When the starter is activated and the engine is started, the operator releases the key switch to the ONposition.Charging current generated by operating alternator flows into the battery through the battery relay(CR-1).The current also flows from alternator to each electrical component and controller through the fuse box.
OPERATING FLOW
Warning flowAlternator "I" terminal I/conn ¡†CN-3(3)¡‡ CPU alternator level ¡†CN-51(9)¡‡Cluster charging warning lamp(Via serial interface)
Charging flowAlternator "B+" terminal Battery relay(M8) Battery(+) terminal
Reset button ¡†CN-60¡‡ Fuse box
1)
2)
(1)
(2)
¡ GND : Ground
Engine Start switch Check point Voltage
Run ON
¤ - GND(Battery voltage)
¤Ł- GND(Battery relay)
¤Ø- GND(Alternator B+ terminal)
¤Œ- GND(Alternator I terminal)
¤º- GND(CPU)
20~30V
4 -60
4. HEAD AND WORK LIGHT CIRCUIT (#1001 and up, TIER II)
OPERATING FLOWFuse box (No.14) I/conn ¡†CN-7(7)¡‡ Switch panel ¡†CN-116(9)¡‡Fuse box (No.15) I/conn ¡†CN-7(8)¡‡ Switch panel ¡†CN-116(10,11)¡‡
Head light switch ON Head light switch ON ¡†CN-116(1)¡‡ l/conn¡†CN-7(1)]
Head light ON ¡†CL-4(2)¡‡: Head lamp ONl/conn¡†CN-10(2)¡‡ Cassette radio illumination ON ¡†CN-27(7)¡‡l/conn¡†CN-11(8)¡‡ AC & Heater controller illumination ONl/conn¡†CN-6(8)¡‡ Cigar light ¡†CL-2¡‡
Work light switch ON Work light switch ON ¡†CN-116(2,3)¡‡ l/conn¡†CN-7(2)¡‡ l/conn¡†CN-12(1)¡‡
Work light ON ¡†CL-5(2), CL-6(2)¡‡
CHECK POINT
1)
¡ GND : Ground
(1)
(2)
2)
Engine Start switch Check point Voltage
STOP ON
ONSTOP
¤ - GND(Fuse box)
¤Ł- GND(Switch power input)
¤Ø- GND(Switch power output)
¤Œ- GND(Head light)
¤º- GND(Fuse box)
¤ - GND(Switch power input)
¤ - GND(Switch power output)
¤ - GND(Work light)
20~25V
20~25V
5. BEACON LAMP AND CAB LIGHT CIRCUIT (#1001 and up, TIER II)
OPERATING FLOWFuse box (No.17) I/conn ¡†CN-8(3)¡‡ Beacon lamp switch ¡†CN-23(6)¡‡Fuse box (No.16) I/conn ¡†CN-7(12)¡‡ Switch panel ¡†CN-116(16, 17)¡‡
Beacon lamp switch ONBeacon lamp switch ON ¡†CS-23(2)¡‡ Switch lndicator lamp ON ¡†CS-23(9)¡‡
l/conn¡†CN-8(4)¡‡ l/conn¡†CN-10(10)¡‡Beacon lamp ON ¡†CL-7¡‡
Cab light switch ONCab light switch ON ¡†CN-116(7, 8)¡‡ I/conn¡†CN-7(6)¡‡ I/conn¡†CN-10(11)¡‡
Cab light ON ¡†CL-8(2), CL-9(2)¡‡
CHECK POINT
4 -62
1)
2)
(1)
(2)
¡ GND : Ground
Engine Start switch Check point Voltage
STOP
STOP
ON
ON
¤ - GND(Fuse box)
¤Ł- GND(Switch power input)
¤Ø- GND(Switch power output)
¤Œ- GND(Beacon lamp)
¤º- GND(Fuse box)
¤ - GND(Switch power input)
¤ - GND(Switch power output)
¤ - GND(Cab light)
20~25V
20~25V
4 -64
6. WIPER AND WASHER CIRCUIT (#1001 and up, TIER II)
OPERATING FLOW
Key switch ONFuse box (No.11) I/conn ¡†CN-7(5)¡‡ Switch panel ¡†CN-116(6)¡‡Fuse box (No.4) I/conn ¡†CN-5(4)¡‡ I/conn¡†CN-17(5)¡‡ Wiper motor controller ¡†CN-141(7)¡‡
Wiper motor ¡†CN-21(4)¡‡Fuse box (No.13) I/conn ¡†CN-6(5)¡‡ l/conn¡†CN-17(4)¡‡ Wiper motor controller ¡†CN-141(6)¡‡
Washer pump ¡†CN-22(2)¡‡
Wiper switch ON : 1st step(Intermittent)Wiper switch ON ¡†CN-116(15)¡‡ I/conn¡†CN-9(4)¡‡ I/conn¡†CN-6(10)¡‡ I/conn¡†CN-17(8)¡‡Wiper motor controller ¡†CN-141(10) ¡ (3)¡‡ Wiper motor intermittently operating ¡†CN-21(6)¡‡
Wiper switch ON : 2nd step(Low speed)Wiper switch ON ¡†CN-116(4)¡‡ I/conn¡†CN-7(3)¡‡ I/conn¡†CN-6(9)¡‡ I/conn¡†CN-17(2)¡‡Wiper motor controller ¡†CN-141(2) ¡ (4)¡‡ Wiper motor operating ¡†CN-21(2)¡‡
Washer switch ON Washer switch ON ¡†CN-116(12)¡‡ I/conn¡†CN-7(9)¡‡ I/conn¡†CN-5(1)¡‡ I/conn¡†CN-17(7)¡‡
Wiper motor controller ¡†CN-141(9) ¡ (8)¡‡ I/conn¡†CN-17(6)¡‡ I/conn¡†CN-6(11)¡‡Washer pump ¡†CN-22(1)¡‡ Washer operating
Fuse box(No.13) I/conn ¡†CN-6(5)¡‡ I/conn¡†CN-17(4)¡‡Wiper motor controller ¡†CN-141(6) ¡ (4)¡‡ Wiper motor operating ¡†CN-21(2), Low speed¡‡
Auto parking(When switch OFF)Switch OFF ¡†CN-116(15)¡‡ Wiper motor parking position by wiper motor controller
CHECK POINT
1)
(1)
(2)
(3)
(4)
(5)
¡ GND : Ground
2)
Engine Start switch Check point Voltage
STOP ON
¤ - GND(Fuse box)
¤Ł- GND(Switch power input)
¤Ø- GND(Switch power output)
¤Œ- GND(Wiper Power input)
¤º- GND(Wiper power output)
¤ - GND(Wiper motor)
0 ~ 5V
24V
0 or 24V