Honda NSS250S Manual page 177

maxiscooter-club.ru
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 – Short circuit in Yellow/red wire
NO – Replace the PCM with a known good
one, and recheck.
BEFORE MIL TROUBLESHOOTING
• When the MIL blinks 1, 8 and 9 times, check the
following before MIL troubleshooting.
• Before starting the inspection, check for loose or
poor contact on the sensor unit 5P (Black) and
PCM 33P (Black) connectors.
1. Sensor Unit Power Input Voltage Inspection 1
Connect the test harness 33P to the PCM 33P
(Black) connector (page 6-17).
Turn the ignition switch ON.
Measure the voltage at the test harness termi-
nals.
CONNECTION: 11 (+) – 10 (–)
STANDARD: 4.75 – 5.25 V
Is the voltage within 4.75 – 5.25 V?
YES – GO TO STEP 2.
NO – Replace the PCM with a known good
one, and recheck.
2. Sensor Unit Power Input Voltage Inspection 2
Turn the ignition switch OFF.
Disconnect the sensor unit 5P (Black) connector.
Turn the ignition switch ON.
Measure the voltage at the wire side.
CONNECTION: Yellow/red (+) – Green/orange (–)
STANDARD: 4.75 – 5.25 V
Is the voltage within 4.75 – 5.25 V?
YES – Turn the ignition switch OFF. Connect
the sensor unit 5P (Black) connector and
start the MIL troubleshooting (page 6-
58).
NO – GO TO STEP 3.
FUEL SYSTEM (PGM-FI)
SENSOR UNIT 5P CONNECTOR
(Wire side/female terminals)
Yellow/red
TEST HARNESS PIN BOX
(10)
SENSOR UNIT 5P CONNECTOR
(Wire side/female terminals)
Yellow/red Green/orange
(11)
6-23