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CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
3.56 6 PS M
3.5
PS Moto
Error code: A4
Error code: A4
Situation
Situation
Possible
Possible
cause
cause
Trigger of
Trigger of
the error
the error
code
code
Checks
Checks
3
3
2
2
6
6
5
5
H-01(3W)
H-01(3W)
otor Cu
r Curre
rrent S
nt Sens
ensor F
or Faul
ault (A
Display: "A4". All truck operations inhibited. Line contactor OPEN and ST contactor OPEN.
Display: "A4". All
truck operations inhibited. Line contactor OPEN and ST contactor OPEN.
All operations inhibited except mast
All operations inhibited except mast lowering operation.
Power steering controller.
Power steering controller.
When turning on power, current sensor value is out
When turning on power, current sensor value is out of -120A.
H-01(3W)
H-01(3W)
E-38(4W)
E-38(4W)
R/Y
R/Y
4
4
Tire
Tire
27
27
Y/B
Y/B
5
5
21
21
B
B
6
6
23
23
R/Y
R/Y
3
3
27
27
Br
Br
2
2
22
22
B
B
23
23
1
1
1
1
1
1
2
2
3
3
4
4
4
4
5
5
6
6
E-38(4W)
E-38(4W)
t (A4) 4)
lowering operation.
of -120A.
(1) Disconnect battery plug
(1) Disconnect battery plug
(2) Replace EPS controller
(2) Replace EPS controller
angle
angle
sensor
sensor
2
2
TWR
TWR
M
M
1
1
TVR
TVR
E-27
E-27
1
1
E-27
E-27
2
2
501145
501145
2-125
2-125
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