Toro Groundsmaster 4300-D Service Manual page 36

Engine Electronic Control Unit (ECU) (continued)
Diesel Engine: General Information
Do not plug or unplug the engine ECU for 30 seconds after the
machine key switch is turned off. The engine ECU may remain
energized even though the key switch is in the O
If you must disconnect the engine ECU for any reason, ensure that the key switch
is in the O position with the key removed before disconnecting the engine ECU.
FF
Also, to prevent possible engine ECU damage when welding on the machine,
disconnect and remove the engine ECU from the machine before welding.
The engine electrical components (e.g., ECU, fuel injectors, EGR, and exhaust
DPF) are identified and matched in the engine ECU program. If the engine
electrical components are replaced, 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 exists, the engine speed
may be reduced or the engine may shut off. The Yanmar troubleshooting manual
and electronic diagnosis tool should be used to provide assistance in identifying
the cause of the problem and the repairs that are necessary. Contact your Toro
distributor for any assistance in the Yanmar engine troubleshooting.
IMPORTANT
Page 3–4
position.
FF
Groundsmaster ® 4300-D
16226SL Rev C