Yanmar Engine Electronic Control Unit (Ecu) - Toro Groundsmaster 4500-D Service Manual

Yanmar Engine Electronic Control Unit (ECU)

The Yanmar engine that powers the Groundsmaster
4500--D and 4700--D uses an electronic control unit
(ECU) for engine management and also to communi-
cate with the TEC controllers and the InfoCenter Display
on the machine. All engine ECU electrical connectors
should be plugged into the controller before the machine
ignition switch is moved from the OFF position to either
the ON or START position. If the engine ECU is to be dis-
connected for any reason, make sure that the ignition
switch is in the OFF position with the key removed be-
fore disconnecting the engine ECU. See Chapter 3 --
Yanmar Diesel Engine for additional engine ECU in-
formation.
IMPORTANT: Do not plug or unplug the engine ECU
for a period of thirty (30) seconds after the machine
ignition switch is turned OFF. The ECU may remain
energized even though the ignition switch is OFF.
Groundsmaster 4500--D/4700--D
2
1. Engine (models 30873 and 30874)
2. Engine ECU
2
1. Engine (models 30881 and 30882)
2. Engine ECU
Page 5 - - 3
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Figure 2
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Figure 3
Electrical System