Honda NSS250S Manual page 174

FUEL SYSTEM (PGM-FI)
SENSOR UNIT POWER LINE
INSPECTION (NSS250S)
BEFORE DTC TROUBLESHOOTING
• When the DTC displays 1-2, 8-1 and 9-2, check
the following before DTC troubleshooting.
• Before starting the inspection, check for loose or
poor contact on the sensor unit 5P (Black) and
ECM 33P (Black) connectors.
1. Sensor Unit Power Input Voltage Inspection
Turn the ignition switch OFF.
Disconnect the sensor unit 5P (Black) connector.
Turn the ignition switch ON and engine stop
switch " ".
Measure the voltage at the wire side.
CONNECTION: Yellow/red (+) – Green/orange (–)
STANDARD:
Is the voltage within 4.75 – 5.25 V?
YES
NO
2. Sensor Unit Power Line Open Circuit Inspection
Turn the ignition switch OFF.
Disconnect the ECM 33P (Black) connector (page
6-98).
Check the continuity at the Yellow/red and
Green/orange wires between the sensor unit 5P
and ECM 33P connectors.
TOOL:
Test probe
CONNECTION: Yellow/red – Yellow/red
Is there continuity?
YES
NO
3. Sensor Unit Input Voltage Line Short Circuit
Inspection
Check the continuity between the sensor unit 5P
connector of the wire side and ground.
CONNECTION: Yellow/red – Ground
Is there continuity?
YES
NO
6-20
maxiscooter-club.ru
4.75 – 5.25 V
– Turn the ignition switch OFF, and dis-
connect the sensor unit 5P (Black) con-
nector and start
troubleshooting (page 6-24).
– GO TO STEP 2.
07ZAJ-RDJA110
Green/orange – Green/orange
– GO TO STEP 3.
– • Open circuit in Yellow/red wire
• Open circuit in Green/orange wire
– Short circuit in Yellow/red wire
– Replace the ECM with a known good
one, and recheck.
SENSOR UNIT 5P CONNECTOR
(Wire side/female terminals)
Yellow/red
the DTC
SENSOR UNIT 5P CONNECTOR
(Wire side/female terminals)
Yellow/red
Green/orange
SENSOR UNIT 5P CONNECTOR
(Wire side/female terminals)
Yellow/red
Green/orange
Yellow/red
Green/orange
ECM 33P CONNECTOR
(Wire side/female terminals)