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CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
3.31 1 Lif
3.3
Lift L
Error code: H1
Error code: H1
Situation
Situation
Possible
Possible
cause
cause
Trigger of
Trigger of
the error
the error
code
code
Checks
Checks
(1)
(1)
(2) Sit on seat, then stop pump motor operation
(2) Sit on seat, then stop pump motor operation
(4) Turn off power
(4) Turn off power
Sit on sea
Sit on
operation
operation
If
If
fault
fault
remains
remains
(5) Turn off power
(5) Turn off power
MC
MC
specification
specification
(8) D
(8)
Disconnect connec
isconnect
Sit on seat, then turn on power again
Sit on seat, then turn on power again
If
If
(11) Disconnect battery plug, then perform inverter
(11) Disconnect battery plug, then perform inverter
discharging work
discharging work
(13) Check continuity between E-04-52 and E-36-1(68)
(13) Check continuity between E-04-52 and E-36-1(68)
Check continuity between E-04-51 and E-36-2(67)
Check continuity between E-04-51 and E-36-2(67)
Chec
Check short circuit between E-36-1
Chec
Check short circuit between E-36-2
Continuity ty,
Continui
t Leve
ever, r, Fau
Faulty
lty Set
Settin
ting (
g (H1)
Display: "H1" flashes. Pump motor and power steering operations inhibited. Pump contactor OPEN if this fault
Display: "H1" flashes.
Pump motor and power steering operations inhibited. Pump contactor OPEN if this fault
occurs when turning on power. Pump contactor CLOSE if this fault occurs during pump operation and then
occurs when turning on power. Pump contactor CLOSE if this fault
OPEN if truck stops.
OPEN if truck stops.
Key switch turned on while operating lift lever, faulty lift control lever or lift switches 1 and 2, faulty main
Key switch turned on while operating lift lever, faulty lift control lever or lift switches 1 and 2, faulty main
harness, faulty logic unit, faulty input unit.
harness, faulty logic unit, faulty input unit.
Detects lift control lever signal of CAN when turning on power (FC specification). Detects lift microswitch 1 or 2
Detects lift control lever signal of CAN when turning on power (FC specification). Detects lift microswitch 1 or 2
when turning on power (MC specification).
when turning on
power (MC specification).
If
If
this
this
fault
fault
occurred
occurred
pump
pump
motor
motor
operation
operation
If
If
fault
fault
remains
remains
(3) Fail-safe function
(3) Fail-safe function
seat,
t,
then turn on pow
then turn on
power again w
er again
Error
Error
code
code
"
"
(6) Refer to error code
(6) Refer to error code
"54", "67" or "(L)"
"54", "67" or "(L)"
connector E-36
tor E-36
of microswitch
of microswitch
fault
fault
remains
remains
Normal
Normal
k short circuit between E-36-1
k short circuit between E-36-2
,
Not
Not
shorted
shorted
No
No
continui
continui
H1)
during
during
Normal
Normal
without lift
ithout lift
54
54"
"
or
or
"
"
67
67"
"
or
or
"
"
(L)
(L)"
"
FC specification
FC specification
(7) Change lift control lever to other normal control lever
(7) Change lift control lever to other normal control lever
(9) Repair or replace
(9) Repair or replace
FC-IN harness
FC-IN harness
(12) Replace lift switch 1 or 2
(12) Replace lift switch 1 or 2
and
and E-36-
E-36-6
6
and
and E-36-
E-36-6
6
ty
ty
,
,
Shorted
Shorted
occurs during pump operation and then
If
If
this
this
fault
fault
occurred
occurred
when
when
turning
turning
on
on
power
power
Not
Not
changed
changed
Error
Error
(10)
(10) Replac
Replace l
lever
lever
501161
501161
2-73
2-73
changed
changed
e l
ift
ift
control
control
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