Honda NSS250S Manual page 193

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3. ECT Sensor Resistance Inspection
Turn the ignition switch OFF.
Measure the resistance at the ECT sensor termi-
nals.
CONNECTION: Pink/white – Green/orange
STANDARD: 2.3 – 2.6 kΩ (20°C/68°F)
Is the resistance within 2.3 – 2.6 k Ω (20 ° C/68 ° F)?
YES – Replace the PCM with a known good
one, and recheck.
NO – Faulty ECT sensor
4. ECT Sensor Short Circuit Inspection
Turn the ignition switch OFF.
Check the continuity between the ECT sensor 3P
connector at the wire side and ground.
CONNECTION: Pink/white – Ground
Is there continuity?
YES – Short circuit in Pink/white wire
NO – Replace the PCM with a known good
one, and recheck.
DTC 7-2 (ECT SENSOR HIGH
VOLTAGE)
• Before starting the inspection, check for loose or
poor contact on the ECT sensor 3P (Gray) con-
nector and recheck the HDS pocket tester.
1. ECT Sensor System Inspection
Turn the ignition switch ON and engine stop
switch " ".
Check the ECT sensor with the HDS pocket
tester.
Is about 5 V indicated?
YES – GO TO STEP 2.
NO – • Intermittent failure.
• Loose or poor contact on the ECT
sensor 3P (Gray) connector.
FUEL SYSTEM (PGM-FI)
ECT SENSOR
Green/orange
ECT SENSOR 3P CONNECTOR
(Wire side/female terminals)
Pink/white
Pink/white
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