Honda NSS250S Manual page 217

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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: 7 – White/blue
Is there continuity?
YES – GO TO STEP 6.
NO – Open circuit in White/blue wire
6. IAT Sensor Resistance Inspection
Turn the ignition switch OFF.
Connect the sensor unit 5P (Black) connector.
Measure the resistance at the test harness termi-
nals.
CONNECTION: 7 – 10
STANDARD: 1.0 – 1.3 kΩ (40°C/104°F)
Is the resistance within 1.0 – 1.3 k Ω (40 ° C/
104 ° F)?
YES – Replace the PCM with a known good
one, and recheck.
NO – Faulty sensor unit (IAT sensor)
MIL 12 BLINKS (INJECTOR)
• Before starting the inspection, check for loose or
poor contact on the injector 2P (Gray) connector
and recheck the MIL blinking.
1. Injector Input Voltage Inspection
Turn the ignition switch OFF.
Disconnect the injector 2P (Gray) connector.
Turn the ignition switch ON and engine stop
switch " ".
Measure the voltage between the injector 2P
connector of the wire side and ground.
CONNECTION: Black/white (+) – Ground
Is there battery voltage?
YES – GO TO STEP 2.
NO – Open or short circuit in Black/blue wire
FUEL SYSTEM (PGM-FI)
SENSOR UNIT 5P CONNECTOR
(Wire side/female terminals)
(7)
TEST HARNESS PIN BOX
TEST HARNESS PIN BOX
(7)
INJECTOR 2P CONNECTOR
(Wire side/female terminals)
Black/white
White/blue
(10)
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