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