Honda NSS250S Manual page 207

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3. IAT Sensor Input Voltage Inspection
Turn the ignition switch OFF.
Disconnect the sensor unit 5P (Black) connector.
Turn the ignition switch ON and engine stop
switch " ".
Measure the voltage at the sensor unit 5P con-
nector of the wire side.
CONNECTION: White/blue (+) – Green/orange (–)
STANDARD: 4.75 – 5.25 V
Is the voltage within 4.75 – 5.25 V?
YES – GO TO STEP 6.
NO – GO TO STEP 4.
4. IAT Sensor Voltage Input Line Short Circuit
Inspection
Turn the ignition switch OFF.
Check the continuity between the sensor unit 5P
connector of the wire side and ground.
CONNECTION: White/blue – Ground
Is there continuity?
YES – Short circuit in White/blue wire
NO – GO TO STEP 5.
5. IAT Sensor Voltage Output Line Open Circuit
Inspection
Check the continuity between the sensor unit 5P
connector of the wire side and test harness.
CONNECTION: 14 – White/blue
Is there continuity?
YES – GO TO STEP 6.
NO – Open circuit in White/blue wire
FUEL SYSTEM (PGM-FI)
SENSOR UNIT 5P CONNECTOR
(Wire side/female terminals)
White/blue
SENSOR UNIT 5P CONNECTOR
(Wire side/female terminals)
White/blue
SENSOR UNIT 5P CONNECTOR
(Wire side/female terminals)
(14)
TEST HARNESS PIN BOX
Green/orange
White/blue
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