Diode Assemblies - Toro Sand Pro 3040 Service Manual

Diode Assemblies

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1. Starter solenoid
2. Main wire harness diode D1
Testing the Diode Assemblies
Sand Pro ® 3040 and 5040
20251SL Rev A
3. Main wire harness diode D2
4. Optional rear remote hydraulics kit
relay
Two diodes plug into the main wire harness below the right side frame rail near
the starter solenoid. These diodes (D1 and D2) provide logic for the interlock
system. One diode plugs into the optional rear remote hydraulics kit wire harness
under the left rear wheel shroud near the rear remote hydraulics kit relay. This
diode (D1) provides circuit protection form the rear remote hydraulics solenoid
valve coil. The diodes can be identified by their black color and diode symbol
on the end of the diode body. The maximum current allowed through any of
the diodes is 6 amps.
1. Park the machine on a level surface, lower any attachments, engage the
parking brake, set the key switch to the O
from the switch.
2. Locate and remove the diode from the wire harness. Check the diode and
the diode holder for damage or corrosion and clean or repair if necessary.
3. Use a multimeter to check for voltage drop across the diode terminals (diode
test setting). Contact the multimeter red (+) lead to diode terminal A and the
black (−) lead to diode terminal B. A reading of less than 0.7 volts should be
displayed on the multimeter.
OR
Use the table provided and a multimeter (ohms setting) to measure the
resistance across the diode terminals.
Figure 86
FF
Page 6–21 Electrical System: Testing the Electrical Components
5. Optional rear remote hydraulics wire
harness diode D1
position and remove the key