Komatsu PC88MR-10 Shop Manual page 288

10 Structure and function
Electrical control system
Pin No.
Solenoid power supply
118
Wiper motor (+)
119
GND (solenoid)
120
Solenoid power supply
121
*1: Never connect these pins. Malfunctions or failures may occur.
Fuel control dial
(PC-AGJ7-041-K-01-A)
1. Knob
2. Dial
3. Spring
4. Ball
5. Potentiometer
6. Connector
Function
(PC-AGJ7-042-K-00-A)
This dial is installed in the right console box. Turning knob (1) causes potentiometer (5) shaft to rotate.
As the potentiometer shaft is turned, the resistance of the variable resistor in potentiometer (5) changes
and a throttle signal is sent to the engine controller.
The hatched areas in the graph are abnormality detection areas. If the throttle voltage is within the area,
the engine speed drops down to low idle.
10-210
Signal name Input/output signal
Input
Output
Input
Input
PC88MR-10