Honda NSS250A Reflex 2001-2007, Manual

Page: 200 / 718

FUEL SYSTEM (PGM-FI)
6-46
2. O
2
Sensor Open Circuit Inspection
Turn the ignition switch OFF.
Disconnect the PCM 33P (Black) connector.
Disconnect the O
2
sensor 1P (Black) connector.
Check the continuity between the O
2
sensor 1P
and PCM 33P connectors of the wire side.
Is there continuity?
YES – GO TO STEP 3.
NO – Open circuit in Black/orange wire
3. O
2
Sensor Short Circuit Inspection
Connect the PCM 33P (Black) connector.
Check the continuity between the O
2
sensor 1P
connector of the wire side and ground.
Is there continuity?
YES – Short circuit in Black/orange wire
NO – GO TO STEP 4.
4. O
2
Sensor Inspection
Replace the O
2
sensor and O
2
sensor cord with a
new one (page 6-107).
Erase the DTC’s (page 6-16).
Connect the O
2
sensor 1P (Black) connector.
Turn the ignition switch ON and engine stop
switch " ".
Start the engine and warm up until the engine oil
temperature is 80
°
C (176
°
F).
Test-ride the scooter and recheck the O
2
sensor
with the HDS pocket tester.
Is the DTC 21-1 indicated?
YES – Replace the PCM with a known good
one, and recheck.
NO – Faulty original O
2
sensor and/or O
2
sen-
sor cord
TOOL:
Test probe
07ZAJ-RDJA110
CONNECTION: Black/orange – Black/orange
PCM 33P CONNECTOR
(Wire side/female terminals)
O
2
SENSOR 1P CONNECTOR
(Wire side/female terminal)
Black/orange
Black/orange
CONNECTION: Black/orange – Ground
O
2
SENSOR 1P CONNECTOR
(Wire side/female terminal)
Black/orange
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