Honda NSS250S Manual page 199

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4. Injector Signal Line Short Circuit Inspection
Check the continuity between the injector 2P
connector at the wire side and ground.
CONNECTION: Pink/blue – Ground
Is there continuity?
YES – Short circuit in Pink/blue wire
NO – GO TO STEP 5.
5. Injector Resistance Inspection
Measure the resistance between the injector ter-
minals.
STANDARD: 11 – 13 Ω (20°C/68°F)
Is the resistance within 11 – 13 Ω (20 ° C/68 ° F)?
YES – Replace the PCM with a known good
one, and recheck.
NO – Faulty injector
DTC 21-1 (O SENSOR)
2
Do not reuse O sensor cord, if the O
2
disconnected, replace the O
one.
• Before starting the inspection, check for loose or
poor contact on the O sensor 1P (Black) connec-
2
tor or O sensor cap and recheck the DTC.
2
1. O Sensor System Inspection
2
Start the engine and warm it up until the engine
oil temperature is 80°C (176°F).
Test-ride the scooter and check the O
with the HDS pocket tester.
Is the DTC 21-1 indicated?
YES – GO TO STEP 2.
NO – • Intermittent failure
• Loose or poor contact on the O
sor 1P (Black) connector
INJECTOR 2P CONNECTOR
(Wire side/female terminals)
INJECTOR
(Sensor side/male terminals)
sensor cap is
2
sensor cord with a new
2
sensor
2
sen-
2
FUEL SYSTEM (PGM-FI)
Pink/blue
6-45