Toro Groundsmaster 5900 Series Service Manual page 362

Testing
Electrical System: Component Testing
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1. Yanmar ECU
2. Start relay
The following relays are located on the left side of the engine near the Yanmar
ECU (Figure 241):
•
The start relay supplies power to the engine starter. The glow plug relay is
energized by the Yanmar ECU.
•
The glow plug relay supplies power to the engine glow plugs. The glow plug
relay is energized by the Yanmar ECU.
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1. Cab headliner (roof removed)
The air conditioner relay used on the Groundsmaster 5910 supplies power to the
air conditioning system evaporator fans and the compressor clutch. This relay is
energized when the key switch is in the START or RUN position (cab contactor
closed), the fan speed switch is set to low, medium or high speed and the air
conditioning switch is set to ON. The air conditioner relay is located in the cab
headliner near the fuse block
panel from top of cab (see
1. Make sure key switch is OFF. Remove key from key switch.
2. Turn battery−disconnect switch to the OFF position.
3. Verify the location of the relay being tested (above) and access the relay.
3
2
Figure 241
3. Glow plug relay
1
Figure 242
2. Air conditioner relay
(Figure 242). To access the relay, remove roof
Roof Assembly (page
Page 6–100
1
2
9–9)).
Groundsmaster ® 5900 & 5910
16227SL Rev B