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6
6
3
3
6
6
4
4
CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
3.1
3.17 7 Ste
Steeri
Error code: 41
Error code: 41
Sit
Situat
uation
ion
Possible
Possible
cause
cause
Trigger of
Trigger of
the error
the error
code
code
Checks
Checks
(1) Turn off power, then turn on power again. Confirm error code display
(1) Turn off power, then turn on power again. Confirm error code display
(2) Disconnect battery plug, then perform inverter discharging work
(2) Disconnect battery plug, then perform inverter discharging work
Check continuity of the steering fuse
Check continuity of the steering fuse
Check continuity of the control line fuse for contactor coil
Check continuity of the control line fuse for contactor coil
(3) Blo
(3)
Block wh
ck
steering fuse
steering fuse
Then confirm pump contactor
Then confirm pump contactor
operation in self-dia
operation in
Not
Not
(5) Disconnect battery plug, then perform inverter discharging work
(5) Disconnect battery plug, then perform inverter discharging work
(6) Chec
(6)
Check to
Chec
Check steering
(8) Measure resistance of contactor coil
(8) Measure resistance of contactor coil
[61Ω at -30 °C(-22 °F) to 91Ω at 80 °C(176 °F)]
[61Ω at -30 °C(-22 °F) to 91Ω at 80 °C(176 °F)]
(9) Disconnect connectors E-04
(9) Disconnect connectors E-04
Check continuity
Chec
contactor coil plus(+)
contactor coil plus(+)
Check continuity between E-04-64 and steering
Check continuity between E-04-64 and steering
contactor coil minus(-)
contactor coil minus(-)
(11) Perform inverter discharging work, then replace
(11) Perform inverter discharging work, then replace
logic card of logic unit
logic card of logic unit
(13) Install the steering fuse, connect battery plug and tern on
(13) Install the steering fuse, connect battery plug and tern on
(14) Measure voltage between P and N of EPS controller (1 minute may)
(14) Measure voltage between P and N of EPS controller (1 minute may)
(15) Disconnect battery plug, then perform inverter
(15) Disconnect battery plug, then perform inverter
discharging work
discharging work
6
6
1
1
5
5
9
9
-
-
5
5
5
5
5
5
3
3
5
5
1
1
4
4
9
9
-
-
6
6
2
2
6
6
0
0
-
-
5
5
6
6
-
-
5
5
2
2
5
5
0
0
4
4
8
8
ering
ng Con
Contac
tactor
tor Fau
Fault lt (41
Displa
Dis
play: "41
y: "41". All t
". All truc
ruck ope
k operat
Faulty steering contactor, faulty main harness, faulty logic unit.
Faulty steering contactor, faulty main harness, faulty logic unit.
Inverter voltage data is checked when contactor is closed (400 mS).
Inverter voltage data is checked when contactor is closed (400
.
.
Continuity
Continuity
wheels
eels
and remove the traction fuse,pump f
and remove the traction fuse,pump f
self-diagnostic
gnostics step
s step
[15]
[15]
operated
operated
Operated
Operated
k to
see if steer
see if
steering
ing
contactor t
contac
tor t
ip moves smoothly
ip moves smoothly
k steering
contactor tip for melting
contac
tor tip for melting
Normal
Normal
Abnormal
Abnormal
Within
Within
range
range
Out
Out
k continuity
between
between
E-04-63
E-04-63
and Steering
and Steering
Continuity
Continuity
No
No
Normal
Normal
43
43
-
-
44
44
-
-
(41) )
ration
ions inhi
s inhibit
bited
ed. Lin
. Line con
e contac
tactor O
tor OPEN a
If fault
If fault
(41) rem
(41)
remains
ains
(4) Replace steering fuse
(4) Replace steering fuse
use
use,
,
(7)
(7)
Go to step (13)
Go to step (13)
of
of
range
range
(10)
(10)
continuity
continuity
(12) Repair or replace main harness
(12) Repair or replace main harness
(16) Replace power cable
(16) Replace power cable
PEN and ste
nd steeri
ering co
ng conta
ntacto
ctor OPE
mS).
No
No
continuity
continuity
Replace steering
Replac
e steering
contac
contactor
tor
Abnormal
Abnormal
501142
501142
2-45
2-45
r OPEN. N.
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