Multi Pro 1750
Page 5 − 35
Electrical System
Operator Seat Switch
The seat switch is normally open and closes when the
operator seat is occupied. If the parking brake is not en-
gaged when the operator raises out of the seat, the en-
gine will stop. The seat switch is located directly under
the operator seat. The Toro Electronic Controller (TEC)
monitors the operation of the seat switch (input).
Testing
The seat switch and its circuit wiring can be tested as a
TEC qualifier using the InfoCenter Display (see In-
foCenter Display − Diagnostics Screen in this chapter).
If testing determines that the switch and circuit wiring are
not functioning correctly, proceed with the following test
procedure:
1. Park machine on a level surface, stop spray pump,
stop engine and engage parking brake. Remove key
from ignition switch.
2. Raise and support operator seat to access seat
switch.
3. Disconnect wire harness electrical connector from
the seat switch under the operator seat (Fig. 35).
4. Check the continuity of the switch by connecting a
multimeter (ohms setting) across the switch connector
terminals.
5. With no pressure on the seat, there should be no
continuity (infinite ohms resistance) between the seat
switch terminals.
6. Press directly onto the seat switch through the seat
cushion. There should be continuity (zero ohms resis-
tance) between the seat switch terminals as the seat
cushion approaches the bottom of its travel.
7. If testing determines that seat switch is faulty, re-
place switch.
8. If the seat switch tests correctly and a circuit problem
still exists, check wire harness (see Electrical Schemat-
ic and Wire Harness Drawings in Chapter 10 − Electrical
Drawings in this manual).
9. After seat switch testing is completed, connect wire
harness electrical connector to the seat switch. Lower
and secure seat.
1. Seat switch
Figure 35
1
Electrical
System
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