Diode Assemblies - Toro Groundsmaster 4500-D Series Service Manual

Diode Assemblies

Testing
Groundsmaster ® 4500-D/4700-D
19245SL Rev A
g276035
1. Diode assembly
2. Male terminal
The Groundsmaster engine wire harness contains a diode assembly that is used
for circuit protection from voltage spikes when the engine starter solenoid is de−
energized. This diode assembly plugs into the engine wire harness near the
engine starter motor.
Groundsmaster models 30885 and 30887 use an additional diode assembly
in the engine wire harness that protects the engine EGR circuit from reverse
polarity. This diode assembly plugs into the engine wire harness near the engine
electronic control unit (ECU).
The diode assemblies can be identified by a black color and a diode symbol on
the end of the diode assembly body. Refer
information on diode assembly location.
A diode assembly can be tested using a digital multimeter (diode test or ohms
setting) and the table to the right.
Multimeter Red Lead (+)
on Terminal
Female
Male
1
4
Figure 223
3. Female terminal
4. End of diode body
Appendix A (page A–1)
Multimeter Black Lead
(−) on Terminal
Male
Female
Page 6–63
2
3
for additional
Continuity
YES
NO
Electrical System: Component Testing