Traction Neutral Switch - Toro GroundsmasterR 4300-D Service Manual

Traction Neutral Switch

The traction neutral switch is a normally open proximity
switch that closes when the traction pedal is in the neu-
tral position. The switch mounts to a bracket on the trac-
tion pump (Fig. 31). The sensing plate for the traction
neutral switch is the traction lever bracket that is secured
to the pump control arm. The neutral switch is used as
an input for the TEC controller.
Testing
1. Before disconnecting the traction neutral switch for
testing, the switch and its circuit wiring should be tested
as a TEC controller input with the Diagnostic Display
(see Diagnostic Display in the Troubleshooting section
of this chapter). If the Diagnostic Display verifies that the
traction neutral switch and circuit wiring are functioning
correctly, no further switch testing is necessary. If, how-
ever, the Diagnostic Display determines that the traction
neutral switch and circuit wiring are not functioning cor-
rectly, proceed with testing procedure.
2. Turn ignition switch to the ON position (do not start
engine) and check LED on cable end of neutral switch
(Fig. 31). LED should be illuminated when the traction
pedal is in the neutral position.
3. With the ignition switch still in the ON position (do not
start engine), press traction pedal out of the neutral posi-
tion and check LED on cable end of neutral switch. LED
should not be illuminated when the traction pedal is
not in the neutral position.
4. If the neutral switch LED did not function correctly:
A. Make sure that neutral switch is properly adjusted
(see Traction Neutral Switch in the Adjustments sec-
tion of this chapter). If necessary, adjust switch and
return to step 2 above.
B. Make sure ignition switch is OFF and disconnect
the traction neutral switch connector from the ma-
chine wire harness.
C. Verify that the machine wire harness connector
terminal for black wire is closed (continuity) to
ground.
Groundsmaster 4300--D
D. Turn ignition switch to the ON position (do not
start engine) and verify with a multimeter that ma-
chine wire harness connector terminal for pink wire
has system voltage (12 VDC) present.
E. If black wire is closed to ground, pink wire has
system voltage present and switch LED did not func-
tion, replace traction neutral switch. Adjust switch af-
ter installation (see Traction Neutral Switch in the
Adjustments section of this chapter).
5. If the neutral switch tests correctly and a circuit prob-
lem still exists, check wire harness (see Electrical Sche-
matic and Circuit Drawings in Chapter 8 -- Foldout
Drawings).
6. Make sure that traction neutral switch is connected
to wire harness when testing is complete.
FRONT
1. Traction pump
2. Traction neutral switch
3. Traction lever bracket
4. Pump control arm
Page 5 - - 29
3
5
6
4
2
6
1
5
7
Figure 31
5. Jam nut (2 used)
6. Lock washer (2 used)
7. Switch LED location
Electrical System