1998-2004 Honda Foreman 450 factory service manual, Page 417Get this manual
ELECTRIC SHIFT PROGRAM (ESP) Turn the ignition switchOFF"Disconnect the control unit 16P (black) connectorWith the ignition switch "ON", measure the voltage between the BlackGreen connector terminal of the wire harness side and body groundOut of range
Open circuit in BlackGreen wire Loose or poor contacts of related terminal
ECU 16P (BLACK) CONNECTOR CONNECTION: BlackGreen (+)Body ground STANDARD: 11 minimum Normal Abnormal Connect the control unit 16P connector1Open circuit in RediYwllow wire Turn the ignition switch "OFF" Loose or poor contacts of related terminal Disconect the control unit 5P connectorInstall jumper wire between the BlackOrange terminal of the cnntro unit SP connector (harness side) to the positive battery terminalWith the ignition switch "ON", measure the voltage between the RediYellow connector terminal of the wire harness side and body ground