Honda 2003 NPS50 Ruckus Service Manual page 252

INPUT VOLTAGE INSPECTION
Remove the floor step (page 3-7).
" n".
Disconnect the throttle position sensor 3P connec­
tor.
Turn the ignition switch to ON and engine stop
switch to
Measure the input voltage between the Yellow/red
(+) and Blue/green (-) wire terminals of the wire har­
ness side connector.
STANDARD: 4.7 - 5.3 V
If the input voltage is abnormal, o r if there is no
input voltage, check for an open o r short circuit i n
the wire harness, or loose o r poor ECM connector
contact, or battery line and ignition switch circuit of
the ECM (page 1 6-9).
If the above check is normal, replace the ECM.
Install the floor step (page 3-7).
REMOVAL/INSTALLATION
Remove the floor step (page 3-7).
Disconnect the throttle position sensor 3P connec­
tor.
Remove the screw and throttle position sensor from
the carburetor.
Install the throttle position sensor by aligning the
g roove of the throttle position sensor with the flat of
the throttle shaft.
NOTICE
The throttle position sensor may be damaged if you
do nat install it correctly.
Install and tighten the screw securely.
Connect the throttle position sensor 3P connector.
Install the floor step (page 3-7).
IGNITION SYSTEM
1 7-9