Honda NSS250S Manual page 182

FUEL SYSTEM (PGM-FI)
2. ECT Sensor Inspection
Turn the ignition switch OFF.
Disconnect the ECT sensor 3P (Gray) connector.
Connect the ECT sensor terminals of the wire
side with a jumper wire.
CONNECTION: Pink/white – Green/orange
Turn the ignition switch ON and engine stop
switch " ".
Check the ECT sensor with the HDS pocket
tester.
Is about 0 V indicated?
YES
NO
3. ECT Sensor Output Line Inspection
Turn the ignition switch OFF.
Disconnect the jumper wire.
Disconnect the ECM 33P (Black) connector.
Check the continuity between the ECM and ECT
sensor connectors of the wire side.
TOOL:
Test probe
CONNECTION: Pink/white – Pink/white
Is there continuity?
YES
NO
DTC 8-1 (TP SENSOR LOW VOLTAGE)
1. TP Sensor System Inspection
Turn the ignition switch ON and engine stop
switch " ".
Check the TP sensor with the HDS pocket tester
when throttle fully closed.
Is about 0 V indicated?
YES
NO
2. Sensor Unit Power Line Inspection
Check the sensor unit power line inspection
(page 6-20).
Is the sensor unit power line normal?
YES
NO
6-28
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– Faulty ECT sensor
– GO TO STEP 3.
07ZAJ-RDJA110
Green/orange – Green/orange
– Replace the ECM with a known good
one, and recheck.
– • Open circuit in Pink/white wire
• Open circuit in Green/orange wire
– GO TO STEP 2.
– • Intermittent failure
• Loose or poor contact on the sensor
unit 5P (Black) connector
– GO TO STEP 3.
– Replace or repair the abnormal circuit.
ECT SENSOR 3P CONNECTOR
(Wire side/female terminals)
Pink/white
JUMPER WIRE
ECM 33P CONNECTOR
(Wire side/female terminals)
Green/
orange
Pink/
white
ECT SENSOR 3P CONNECTOR
(Wire side/female terminals)
Green/orange
Green/
orange
Pink/
white