Engine Electronic Control Unit (Ecu) - Toro Reelmaster 7000-D Service Manual

Engine Electronic Control Unit (ECU)

The Yanmar engine that powers your Reelmaster uses
an Electronic Control Unit (ECU) for engine manage-
ment and also to communicate with the Toro Electronic
1
Controller (TEC) and the operator InfoCenter display on
the machine. All wire harness electrical connectors
should be plugged into the ECU before the machine igni-
tion switch is moved from the OFF position to either the
ON or START position.
The engine electrical components (e.g. ECU, fuel inject-
ors, EGR, exhaust DPF) are identified and matched in
2
the engine ECU program. If engine electrical compon-
ents are replaced on the engine, the Yanmar electronic
tool must be used to update the ECU program which will
ensure correct engine operation.
If the engine ECU identifies that an engine problem ex-
ists, the engine speed may be reduced or the engine
might stop. The Yanmar electronic tool and
troubleshooting manual should be used to provide as-
sistance in identifying the cause of the problem and the
repairs that are necessary. Contact your Toro distributor
for assistance in Yanmar engine troubleshooting.
IMPORTANT: Do not plug or unplug the engine ECU
for a period of thirty (30) seconds after the machine
Figure 1
key switch is turned OFF. The ECU may remain ener-
1. Engine 2. Engine ECU
gized even though the ignition switch is OFF.
If the engine ECU is to be disconnected for any reason,
make sure that the ignition switch is in the OFF position
with the key removed before disconnecting the engine
ECU. Also, to prevent possible ECU damage when
welding on the machine, disconnect the engine ECU
from the machine before welding.
The engine ECU is mounted to the machine using four
(4) rubber grommets. The grommets isolate the ECU
from the machine electrically, and reduce machine vi-
bration to the ECU. Make sure the ECU mounting grom-
mets remain soft and unbroken. Replace grommets as
necessary.
Yanmar Diesel Engine Page 3 − 4 Reelmaster 7000−D