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2-6
2-6
3. 3.2 2
Tr Trac acti tion
Error code: E1
Error code: E1
Controller/motor overheat indicator ON.
Controller/m
Situation
Situation
steering operations. Service tool "Alarm status" and "E1" displayed.
steering operations. Service tool "Alarm status" and "E1" displayed.
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,
Possible
Possible
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
cause
cause
abnormality in front axle, faulty display unit
abnormality in front axle, faulty display unit
Trigger of
Trigger of
Motor temperature is out of range of -25 °C to 145
Motor temperatu
the error
the error
Recovers when motor temperature is in
Recovers when motor temperatur
code
code
Checks
Checks
(1) Let truck cool for 15 minutes
(1) Let truck cool for 15 minutes
Without service tool
Without service tool
(11) Disc
(11)
Disconnect battery plug. Wa
onnect battery plug.
temperature becomes close to room temperature
temperature becomes close to room temperature
on Mo
Moto tor r L. L.H. H.,O ,Ove
verh rhea
eati ting
otor overheat indicator ON. Poor pulling power and
re is out of range of -25 °C to 145 °C (-13 °F to 293 °F).
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
With service tool
With service tool
Wait
it
until lef
until lef
t
t
CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
ng (E (E1) 1)
Poor pulling power and acceleration. Normal pump motor and
°C (-13 °F to 293 °F).
e is in range of -20 to 70
range of -20 to 70 °C (-4 to 158
°C (-4 to 158 °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
(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
Confirm there is no diff
between right and left wheels
between right and left wheels
No
No
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)
(8) Replac
Replace left
motor
motor
(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
o
o
r
r
m
m
o
o
r
r
e
e
traction motor
traction motor
acceleration. Normal pump motor and power
open harness wiring,
logic unit, brake or parking brake drag,
brake drag,
°F).
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
If problem reoccurs
If problem reoccurs
drag
drag
(4) Adjust brake
(4) Adjust brake
differenc
erence in rotation
e in rotation
Difference
Difference
e left
traction
traction
(9)
(9) Replac
Replace left
motor or front axle
motor or front axle
-20
-20
°C(-4
°C(-4
°F)
°F)
-20
-20
t
t
h
h
a
a
n
n
7
7
0
0
°
°
C
C
(
(
1
1
5
5
8
8
°
°
F
F
)
)
(
(
- 4
- 4
(12) Normal
(12) Normal
501135
501135
power
Drag
Drag
load
load
e left
traction
traction
°C
°C
to
to
70
70
°C
°C
°
°
F
F
t
t
o
o
1
1
5
5
8
8
°
°
F
F
)
)
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