Honda NSS250S Manual page 205

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4. ECT Sensor Short Circuit Inspection
Check the continuity between the ECT sensor
connector of the wire side and ground.
CONNECTION: Pink/white – Ground
Is there continuity?
YES – Short circuit in Pink/white wire
NO – GO TO STEP 5.
5. 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 ECM with a known good
one, and recheck.
NO – Faulty ECT sensor
MIL 8 BLINKS (TP SENSOR)
1. Sensor Unit Power Line Inspection
Check the sensor unit power line inspection
(page 6-20).
Is the sensor unit power line normal?
YES – GO TO STEP 2.
NO – Replace or repair the abnormal circuit.
2. TP Sensor Output Voltage Inspection
Turn the ignition switch ON and engine stop
switch " ".
Measure the TP sensor output voltage at the test
harness terminals.
CONNECTION: 5 (+) – 4 (–)
STANDARD:
0.29 – 0.71 V (throttle fully closed)
4.13 – 4.76 V (throttle fully opened)
Is there standard voltage?
YES – • Intermittent failure
• Loose or poor contact on the ECM
connector
NO – GO TO STEP 3.
FUEL SYSTEM (PGM-FI)
ECT SENSOR 3P CONNECTOR
(Wire side/female terminals)
Pink/white
ECT SENSOR (Sensor side/male terminals)
Green/orange
TEST HARNESS PIN BOX
(4)
Pink/white
(5)
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