2-6
2-6
501135
501135
CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
3.
3.2
2
Tr
Trac
acti
tion
on Mo
Moto
tor
r L.
L.H.
H.,O
,Ove
verh
rhea
eati
ting
ng (E
(E1)
1)
Error code: E1
Error code: E1
Situation
Situation
Controller/m
Controller/motor overheat indicator ON.
otor overheat indicator ON. Poor pulling power and
Poor pulling power and acceleration. Normal pump motor and
acceleration. Normal pump motor and power
power
steering operations. Service tool "Alarm status" and "E1" displayed.
steering operations. Service tool "Alarm status" and "E1" displayed.
Possible
Possible
cause
cause
Overheating of left traction motor, faulty left traction motor or thermal sensor, faulty or
Overheating of left traction motor, faulty left traction motor or thermal sensor, faulty or open harness wiring,
open harness wiring,
faulty left traction inverter DSP card, abnormal power supply of
faulty left traction inverter DSP card, abnormal power supply of logic unit, brake or parking
logic unit, brake or parking brake drag,
brake drag,
abnormality in front axle, faulty display unit
abnormality in front axle, faulty display unit
Trigger of
Trigger of
the error
the error
code
code
Motor temperatu
Motor temperature is out of range of -25 °C to 145
re is out of range of -25 °C to 145 °C (-13 °F to 293 °F).
°C (-13 °F to 293 °F).
Recovers when motor temperatur
Recovers when motor temperature is in
e is in range of -20 to 70
range of -20 to 70 °C (-4 to 158
°C (-4 to 158 °F).
°F).
Checks
Checks
502805
502805
(1) Let truck cool for 15 minutes
(1) Let truck cool for 15 minutes
O
O
v
v
e
e
r
r
h
h
e
e
a
a
t
t
i
i
n
n
d
d
i
i
c
c
a
a
t
t
o
o
r
r
O
O
N
N
O
O
v
v
e
e
r
r
h
h
e
e
a
a
t
t
i
i
n
n
d
d
i
i
c
c
a
a
t
t
o
o
r
r
O
O
F
F
F
F
(2) on motor becomes normal
(2) on motor becomes normal
(3) Disconnect battery plug
(3) Disconnect battery plug
Disengage brake and parking brake, and check their
Disengage brake and parking brake, and check their
drag
drag
No
No
drag
drag
Drag
Drag
(4) Adjust brake
(4) Adjust brake
(5) Lift front wheels, and disengage parking brake
(5) Lift front wheels, and disengage parking brake
Turn key switch to OFF, rotate front wheels
Turn key switch to OFF, rotate front wheels
Confirm there is no diff
Confirm there is no diff
erenc
erenc
e in rotation
e in rotation
load
load
between right and left wheels
between right and left wheels
No
No
difference
difference
Difference
Difference
(6) Check if truck is operated on steep
(6) Check if truck is operated on steep
upgrade or to pull large cargo load
upgrade or to pull large cargo load
Normal
Normal
(7) Perform inverter discharging work
(7) Perform inverter discharging work
(8) Replac
(8) Replac
e left
e left
traction
traction
motor
motor
(9) Replac
(9) Replac
e left
e left
traction
traction
motor or front axle
motor or front axle
(10) Confirm temperature of left traction motor with
(10) Confirm temperature of left traction motor with
input/output monitor
input/output monitor
Less
Less
than
than
-20
-20
°C(-4
°C(-4
°F)
°F)
-20
-20
°C
°C
to
to
70
70
°C
°C
o
o
r
r
m
m
o
o
r
r
e
e
t
t
h
h
a
a
n
n
7
7
0
0
°
°
C
C
(
(
1
1
5
5
8
8
°
°
F
F
)
)
(
(
- 4
- 4
°
°
F
F
t
t
o
o
1
1
5
5
8
8
°
°
F
F
)
)
(11) Disc
(11) Disc
onnect battery plug. Wa
onnect battery plug. Wa
it
it
until lef
until lef
t
t
traction motor
traction motor
temperature becomes close to room temperature
temperature becomes close to room temperature
With service tool
With service tool
Without service tool
Without service tool
If problem reoccurs
If problem reoccurs
(12) Normal
(12) Normal
Summary of Contents for FB13PNT
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