Traction Pedal Position Sensor - Toro Groundsmaster 5900 Series Service Manual

Traction Pedal Position Sensor

Testing
Groundsmaster ® 5900 & 5910
16227SL Rev B
g288612
1. Traction pedal
The traction pedal position sensor is connected to the traction pedal assembly
(Figure 266). This sensor determines the neutral band for the traction pedal, the
direction of travel desired by the operator and the traction speed. The sensor
is a single analog, dual digital signal electronic device. The sensor includes a
potentiometer (variable resistor) that provides an analog signal for the master
controller to determine the desired ground speed based on how far the traction
pedal is depressed in either direction. The traction pedal position sensor
also houses two (2) switches that are used to determine the neutral position
(dead−band) and the indicated direction of travel (forward or reverse).
As the traction pedal is depressed, the appropriate position sensor switch
closes and sends a digital signal to the master controller controller to determine
machine direction and the internal wiper of the potentiometer moves and sends
the analog signal to the master controller controller to determine machine
speed. The traction pedal position sensor must be calibrated with the master
controller to determine the neutral and full speed set points for both the forward
and reverse directions.
A properly installed and calibrated traction pedal position sensor is critical to
accurate traction response and position sensor life. Use care when installing and
calibrating the traction pedal position sensor.
1. Inspect traction pedal assembly for loose, damaged or worn components
(see Traction Pedal (page
2. Calibrate the traction pedal position sensor and test machine operation (see
Traction Pedal Position Sensor Calibration (page
3. If the traction pedal position sensor continues to perform poorly, check the
wire harness (see Appendix A (page
4. Replace position sensor if necessary (see
Figure 266
2. Traction pedal position sensor
7–37)).
A–1)).
Traction Pedal (page
Page 6–123
1
2
6–51)).
7–37)).
Electrical System: Component Testing