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SEN03834-01
Electrical system (HST controller system)
a Except where otherwise specified, the displayed travel speed in this document represents the one when
20.5-25 tire is worn.
Input and output signals diagram
Travel speed range selector switch
Variable shift control switch
Traction control switch
Directional lever (F, N, R)
Directional selector switch (F, N, R)
Directional selector switch actuation switch
Parking brake lever intermediate switch
Parking brake lever bottom switch
Speed sensor A
Speed sensor B
HST oil pressure sensor
Engine speed (Eng_con)
Accelerator pedal angle (Eng_con)
Coolant temperature (Eng_con)
Boost temperature (Eng_con)
Monitor display information (Eng_con)
(Failure code, real-time monitor, pilot lamp,
alarm buzzer, etc.)
HST oil temperature (Mon)
Cooling fan manual reverse rotation (Mon)
Cooling fan automatic reverse rotation (Mon)
ECSS (Mon)
Traction control S mode (Mon)
Model selection (Mon)
Option device selecting (Mon)
Automatic fan switching cycle to reverse rotation
(Mon)
Reverse rotation duration (Mon)
Traction control level (A, B, C) (Mon)
HST selector (A, B) (Mon)
Tire selection (Mon)
Service meter (Mon)
Eng_con: Engine controller
Mon: Machine monitor
KOMTRAX: KOMTRAX terminal
A: Analog signal
D: Digital signal
P: Pulse signal
C: CAN signal
2
10-920
A o
o A HST motor 1 solenoid
A o
o D HST motor 2 solenoid relay
D o
o A Clutch solenoid
D o
o A Cooling fan motor flow rate control EPC valve
D o
o D Cooling fan motor reverse rotation solenoid relay
D o
o D Directional solenoid (F, R)
D o
o D HST controller power holding relay
D o
o D HST safety relay
P o
o C Throttle upper limit (Eng_con)
P o
o C Throttle lower limit (Eng_con)
A o
o C Automatic warm-up cancel (Eng_con)
C o
Monitor display information (Eng_con)
C o
o C
(Failure code, real-time monitor, pilot lamp, alarm
buzzer, etc.)
C o
C o
o C Travel speed (Mon)
o C ECSS operation command (Mon)
C o
o C Back-up lamp operation command (Mon)
o C Failure code signal (Mon)
C o
o C Real-time monitor signal (Mon)
C o
o C Pilot lamp signal (Mon)
C o
o C Load frequency information (KOMTRAX)
C o
C o
C o
C o
C o
C o
C o
C o
C o
C o
920 Electrical system, Part 2
Electrical system (HST controller system)
WA250, 250PZ-6
1
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