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CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
3. 3.26
26 FC
FC Le
Error code: 54
Error code: 54
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 FC control lever
(1) Operate all FC control levers to find faulty FC control lever
Attachment
Attachment
Attachment
Attachment
(3) Turn off power
(3) Turn off power
Replace abnormal FC control lever with normal control
Replace abnormal FC control lever with normal control
lever
lever
Turn on power
Turn on power
Check faulty FC control lever
Check faulty FC control lever
(5) Disconnect battery plug, then perform inverter
(5) Disconnect battery plug, then perform inverter
discharging work
discharging work
(6)
(6) D
Disconnect connector E
isconnect connector
(7) Chec
(7)
Check continuity
E-12-25 and H-04-2(S026),
E-12-25 and H-04-2(S026),
E-1
E-12-26
2-26
E-12-23 and H-04-
E-1
2-23 and H-04-
and
and
E-12-24 and H-04-1(G021)
E-12-24 and H-04-1(G021)
Continuity No continuity
Continuity No continuity
(
(
1
1
1
1
)
)
R
R
e
e
Leve
ver F
r Fau
ault lt (5 (54) 4)
Displ
Display:
ay: "54".
"54". Relat
Related
ed leve
lever o
r opera
Faulty lift FC control lever, faulty tilt FC control lever, faulty attachment 1 and 2 FC control levers, faulty main
Faulty lift FC control lever, faulty tilt FC control lever, faulty attachment 1 and 2 FC control levers, faulty main
harness, faulty input unit.
harness, faulty input unit.
FC control lever voltage is out of range of 0.1 V to 4.9 V.
FC control lever voltage is out of range of 0.1 V to 4.9 V.
2:
2: 4-valv
4-valve spec
e
specification only
ification only
1 and 2:
1 and 2: Inspec
Inspect by check
t by
checking pump motor running so
Found
Found
Not
Not
changed
changed
(4) Disconnect battery plug
(4) Disconnect battery plug
Replace FC control lever
Replace FC control lever
E-12
-12
of input unit.
of input unit.
Lift
Lift
k continuity
between
between
(8) Check continuity between
(8) Check continuity between
E-12-27 and H-05-2(S024),
E-12-27 and H-05-2(S024),
and
and H-04-4(S
H-04-4(S025),
025),
E-12-28 and H-05-4(S023),
E-12-28 and H-05-4(S023),
5(A084)
5(A084)
E-12-23 and H-05-5(A072)
E-12-23 and H-05-5(A072)
and
and
E-12-24 and H-05-1(G020)
E-12-24 and H-05-1(G020)
Continuity
Continuity
p
p
l
l
a
a
c
c
e
e
i
i
n
n
p
p
u
u
t
t
u
u
n
n
i
i
t
t
If fault remains
If fault remains
E-18
E-18
E-15
E-15
peration
tion inhib
inhibited
ited. N
. Norma
ormal t l tract
raction
ing pump motor running
sound if att
und if att
Not
Not
(2)
(2) Fin
Find faulty FC c
d faulty FC
FC
FC contro
control lever voltage sho
l lever voltage
Changed
Changed
Disconnect c
Disconnect
connectors H-04
onnectors H-04
to H-07
to H-07
Tilt
Til
t
Attachment
Attachment
(9) Check continuity between
(9) Check continuity between
E-12-29 and H-06-2(S022),
E-12-29 and H-06-2(S022),
E-12-30 and H-06-4(S021),
E-12-30 and H-06-4(S021),
E-12-23 and H-06-5(A073)
E-12-23 and H-06-5(A073)
and
and
E-12-24 and H-06-1(G019)
E-12-24 and H-06-1(G019)
No
No
continuity
continuity
Continuity
Continuity
(
(
1
1
2
2
)
)
ion moto
motor a
r and p
nd powe
ower s r steer
teering
ing oper
achment is not installed
achment is not installed
found,
found,
with
with
service
service
tool
tool
control lev
ontrol
lever with FC
er with FC
input
input
/
/
output
output
should be
uld be
2.5 ±
2.5 ±
0.2 V if it
0.2 V if it
Note
Note
: -100 % equal
: -100 % equal
100 % equal 4.75 V
100 % equal 4.75 V
of FC control levers
of FC control levers
(FC-IN
(FC-IN harnes
1
1
Attachment
Attachment
(10) Check continuity between
(10) Check continuity between
E-12-31 and H-07-2(S020),
E-12-31 and H-07-2(S020),
E-12-32 and H-07-4(S019),
E-12-32 and H-07-4(S019),
E-12-23 and H-07-5(A074)
E-12-23 and H-07-5(A074)
and
and
E-12-24 and H-07-1(G018)
E-12-24 and H-07-1(G018)
No
No
continuity
continuity
Continuity
Continuity
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
-
-
I
I
N
N
501136
501136
2-63
2-63
operatio
ations.
ns.
Monitor
Monitor
is not operated
is not operated
0 % equal 2.5 V
0 % equal 2.5 V
0.25 V
0.25 V
harness)
s)
2
2
No
No
continuity
continuity
h
h
a
a
r
r
n
n
e
e
s
s
s
s
)
)
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