2-65
2-65
501147
501147
CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
3.2
3.27
7 Out
Output
put Uni
Unit S
t Sole
olenoi
noid F
d Faul
ault (
t (55)
55)
Error code: 55
Error code: 55
Situa
Situation
tion
Displ
Display:
ay: "55".
"55". Relat
Related
ed leve
lever o
r opera
peration
tion inhib
inhibited
ited. N
. Norma
ormal t
l tract
raction
ion moto
motor a
r and p
nd powe
ower s
r steer
teering
ing oper
operatio
ations.
ns.
Possible
Possible
cause
cause
Faulty lift solenoid, faulty tilt solenoid, faulty attachment 1 and 2 solenoids, faulty main harness, faulty output
Faulty lift solenoid, faulty tilt solenoid, faulty attachment 1 and 2 solenoids, faulty main harness, faulty output
unit.
unit.
Trigger of
Trigger of
the error
the error
code
code
When signal is outputted, current is out of range of 0.16 A to 1.9
When signal is outputted, current is out of range of 0.16 A to 1.9 A.
A.
Checks
Checks
(4) Disc
(4) Disc
onnec
onnec
t
t
conne
conne
ctor E-11
ctor E-11
of
of
output unit
output unit
. Disc
. Disc
onnec
onnec
t
t
conne
conne
ctors E-28
ctors E-28
to E-35
to E-35
of
of
soleno
soleno
ids (FC-O
ids (FC-O
UT harnes
UT harnes
s)
s)
Lift
Lift
Til
Til
t
t
Attachment
Attachment
1
1
Attachment
Attachment
2
2
(1) Operate all FC control levers to find faulty solenoid
(1) Operate all FC control levers to find faulty solenoid
Attachment
Attachment
2: 4-v
2: 4-v
alve sp
alve sp
ecification only
ecification only
Attachment
Attachment
1 and 2:
1 and 2:
Inspec
Inspec
t by check
t by check
ing pump motor running so
ing pump motor running so
und if att
und if att
achment is not installed
achment is not installed
F
F
o
o
u
u
n
n
d
d
N
N
o
o
t
t
f
f
o
o
u
u
n
n
d
d
,
,
with service tool
with service tool
(2) F
(2) F
ind faulty so
ind faulty so
lenoid with FC
lenoid with FC
input
input
/
/
output monitor
output monitor
Solenoid current should flow when FC control lever is
Solenoid current should flow when FC control lever is
operated
operated
(3) Disconnect battery plug, then perform inverter
(3) Disconnect battery plug, then perform inverter
discharging work
discharging work
(
(
1
1
3
3
)
)
R
R
e
e
p
p
l
l
a
a
c
c
e
e
o
o
u
u
t
t
p
p
u
u
t
t
u
u
n
n
i
i
t
t
(
(
1
1
4
4
)
)
R
R
e
e
p
p
a
a
i
i
r
r
o
o
r
r
r
r
e
e
p
p
l
l
a
a
c
c
e
e
h
h
a
a
r
r
n
n
e
e
s
s
s (
s (
F
F
C
C
-
-
O
O
U
U
T
T
h
h
a
a
r
r
n
n
e
e
s
s
s
s
)
)
(12) Replace related solenoid
(12) Replace related solenoid
(8) Check continuity between
(8) Check continuity between
E-11-30
E-11-30
and E-
and E-
31-1(10)
31-1(10)
,
,
E-11-32
E-11-32
and E-
and E-
31-2(12)
31-2(12)
,
,
E-11-31
E-11-31
and E-
and E-
35-1(11) an
35-1(11) an
d
d
E-11-32
E-11-32
and E
and E
-35-2(12
-35-2(12
)
)
Continuity
Continuity
No
No
continuity
continuity
(5) Check continuity between
(5) Check continuity between
E-11-21
E-11-21
and
and
E-28-1(1)
E-28-1(1)
,
,
E-11-23
E-11-23
and
and
E-28-2(3)
E-28-2(3)
,
,
E-11-22
E-11-22
and E-32-
and E-32-
1(2) and
1(2) and
E-11-23
E-11-23
and
and
E-32-2(3)
E-32-2(3)
Continuity
Continuity
No
No
continuity
continuity
(6) Check continuity between
(6) Check continuity between
E-1
E-1
1-24
1-24
and E-29-1(4
and E-29-1(4
),
),
E-1
E-1
1-26
1-26
and E-29-2(6
and E-29-2(6
),
),
E-1
E-1
1-25
1-25
and E-33-1(
and E-33-1(
5) and
5) and
E-1
E-1
1-26
1-26
and E-3
and E-3
3-2(6)
3-2(6)
Continuity
Continuity
No
No
continuity
continuity
(7) Check continuity between
(7) Check continuity between
E-11-2
E-11-2
7
7
and
and
E-30-1(
E-30-1(
7),
7),
E-11-2
E-11-2
9
9
and
and
E-30-2(
E-30-2(
9),
9),
E-11-2
E-11-2
8
8
and E-34-
and E-34-
1(8) and
1(8) and
E-11-2
E-11-2
9
9
and
and
E-34-2(
E-34-2(
9)
9)
Continuity
Continuity
No
No
continuity
continuity
(11) Check short circuit between E-11-21(1), E-11-22(2) and E-11-23(3)
(11) Check short circuit between E-11-21(1), E-11-22(2) and E-11-23(3)
Check short circuit between E-11-24(4), E-11-25(5) and E-11-26(6)
Check short circuit between E-11-24(4), E-11-25(5) and E-11-26(6)
Check short circuit between E-11-27(7), E-11-28(8) and E-11-29(9)
Check short circuit between E-11-27(7), E-11-28(8) and E-11-29(9)
Check short circuit between E-11-30(10), E-11-31(11) and
Check short circuit between E-11-30(10), E-11-31(11) and
E-11-32(12)
E-11-32(12)
N
N
o
o
t
t
s
s
h
h
o
o
r
r
t
t
e
e
d
d
S
S
h
h
o
o
r
r
t
t
e
e
d
d
(9) Measure resistance of solenoid coil
(9) Measure resistance of solenoid coil
[13
[13
Ω at -30 °C
Ω at -30 °C
(-22 °F)
(-22 °F)
to 24
to 24
Ω at 80 °C (176
Ω at 80 °C (176
°F)]
°F)]
Normal
Abnormal
Normal
Abnormal
(10) Repair or replace harness (FC-OUT harness)
(10) Repair or replace harness (FC-OUT harness)
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