1998-2004 Honda Foreman 450 factory service manual, Page 435Get this manual
ELECTRIC SHIFT PROGRAM (ESP) Connect fully charged battery to the motor 2P connector terminalsDoes not turn Faulty motor
Motor turns Check the ES system failure (the gear indicator blinks) when turning the ignition switch from "OFFto "ON"No blinks
Repalce the ECU with new one and troubleshoot again
No problem (temporary failure)
Problem Code 6: ECU Fail-Safe Circuit or Problem Code 7: ECU Voltage Convert Circuit