TCM FB-8 Series, Service Manual

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2. ELECTRICAL PARTS AND PROCEDURES FOR CHECKING
Drive system
No. Terminal
Key switch Parking lever Forward switch Accelerator
Remarks
ON Released ON Full throttle
A
Accelerator 1 POT output
voltage (V)
0.97 0.97 0.97 4.08
common to all
models.
B
Accelerator 2 POT output
voltage (V)
0.51 0.51 0.51 2.04
common to all
models.
F
Drive motor current sensor
1 voltage (V)
2.49 2.49 2.49 2.49
common to all
models.
G
Drive motor current sensor
2 voltage (V)
2.49 2.49 2.49 2.49
common to all
models.
I
Drive motor inverter
internal temp. (°C)
– – – –
N Drive motor speed (rpm) 0 0 0
4085
1-ton class trucks
(S mode)
3829
2-ton class trucks
(S mode)
3407
3-ton class trucks
(S mode)
Load handling system
No. Terminal
Lever position
Remarks
Lever pulled
back
Neutral
Lever pushed
forward
during rotation
C
Lift POT output voltage
(V)
4.27 1.05 0.9
common to all
models
H
Pump motor inverter
internal temp. (°C)
– – –
K
Lift current sensor 1
voltage (V)
2.49 2.49 2.49
common to all
models
L
Lift current sensor 2
voltage (V)
2.49 2.49 2.49
common to all
models
O Pump motor speed (rpm) 0 0
2963
1.5-ton class trucks
(S mode)
2962
2.5-ton class trucks
(S mode)
2961
3-ton class trucks
(S mode)
Power steering system (All the items except “D” are inapplicable to trucks with an Orbitrol
steering system.)
No. Terminal
Steering wheel position
Remarks
Left end Center Right end
D
Steering POT output
voltage (V)
3.63 2.5 1.9 common to all models
E
Torque sensor output
voltage (V)
1.04 2.4 3.8 common to all models
J
PS motor inverter internal
temp. (°C)
– – –
M EPS motor current (A)
40 0 40
1-ton class trucks (MAX): The
current is limited when the steering
wheel is turned to each end.
45 0 45
2-ton class trucks (MAX): The
current is limited when the steering
wheel is turned to each end.
38 0 38
3-ton class trucks (MAX): The
current is limited when the steering
wheel is turned to each end.