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CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
3 3 . .
T T r r o o u u b b l l e e s s h h o o o o t t i i n n g g
3. 3.1 1
Tr Trac acti tion
Error code: E0
Error code: E0
Situation
Situation
Possible
Possible
cause
cause
Trigger of
Trigger of
the error
the error
code
code
Checks
Checks
(1) Let t
(1) Let t
on Mo
Moto tor r R. R.H. H.,O ,Ove
verh rhea
Controller/motor overheat indicator ON.
Controller/mo
tor overheat indicator ON. Poor pulling power and
steering operations. Service tool "Alarm status" and "E0" displayed.
steering operations. Service tool "Alarm status" and "E0" displayed.
Overheating of right side traction motor, faulty right side traction motor or thermal sensor, faulty or open
Overheating of right side traction motor, faulty right side traction motor or thermal sensor, faulty or
harness wiring, faulty right traction inverter DSP card, abnormal power supply of logic unit, brake or parking
harness wiring, faulty right traction inverter DSP card, abnormal power supply of
brake drag, abnormality in front axle, faulty display unit.
brake drag, abnormality in front axle, faulty display unit.
Motor temperature is out of range of -25 °C to 145
Motor temper
ature is out of range of -25 °C to 145 °C (-13 °F to 293 °F).
Recovers when motor temperature is in range of -20 to 70 °C (-4 to
Recovers when moto
r temperature is in range of -20 to 70 °C (-4 to 158 °F).
ruck c
ruck
cool for 15 minutes
ool 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
eati ting
ng (E (E0) 0)
Poor pulling power and acceleration. Normal pump motor and
°C (-13 °F to 293 °F).
(2) Traction motor becomes normal
(2) Traction 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
(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 difference in rotation load between
Confirm there is no difference in rotation load between
right and left
right and left
(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
(7) Perform inverter discharging work
(7) Perform inverter discharging work
(8) Replace right traction
(8) Replace right traction
motor
motor
acceleration. Normal pump motor and power
logic unit, brake or parking
158 °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
If problem reoccurs
If problem reoccurs
N
N
o
o
d
d
r
r
a
a
g
g
(4) Adjust brake
(4) Adjust brake
wheels
wheels
N
N
o
o
d
d
i
i
f
f
f
f
e
e
r
r
e
e
n
n
c
c
e
e
Normal
Normal
(9) Replace right traction
(9) Replace right traction
motor or front axle
motor or front axle
2-3
2-3
power
open
F
F
D
D
r
r
a
a
g
g
D
D
i
i
f
f
f
f
e
e
r
r
e
e
n
n
c
c
e
e
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