1998-2004 Honda Foreman 450 factory service manual, Page 420Get this manual
ELECTRIC SHIFT PROGRAM (ESP)
Normal Abnormal Faulty gear position switch
Inspect the change switch (page 21 -29)Normal Disconnect the control unit (ECU) 16P and gear position switch 4P connectorCheck for continuity between the control unit 16P connector and gear position switch 4P connector terminal of the wire harness side
Abnormal
Open circuit in related wire Loose or poor contacts of related terminal