Electronic Control Unit (Ecu) Replacement - Toro Reelmaster 5100-D Service Manual

Electronic Control Unit (ECU) Replacement

IMPORTANT: Before welding on the machine, dis ­
connect both battery cables from the battery, dis ­
connect both wire harness connectors from the
ECU and disconnect the terminal connector from
the alternator to prevent damage to the electrical
system.
1. Stop the engine.
2. Remove nuts securing ECU to frame.
3. Loosen nuts on wiring connectors with a 1/4" nut
driver, then disconnect wiring connectors from ECU
(Fig. 40).
4. Remove ECU.
5. To install ECU, connect wiring connectors to ECU,
then tighten nuts on wiring connectors. Secure ECU to
frame with nuts removed in step 2.
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Reelmaster 5100-D Page 5 - 35
1
2
Figure 40
1. Electronic control unit (ECU)
2. Wiring connectors
Repairs