Honda NSS250S Manual page 213

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5. MAP Sensor Output
Inspection 2
Check the continuity between the test harness
and sensor unit 5P connector of the wire side.
CONNECTION: 8 – Yellow/orange
Is there continuity?
YES – Replace the PCM with a known good
one, and recheck.
NO – Open circuit in Yellow/orange wire
MIL 7 BLINKS (ECT SENSOR)
• Before starting the inspection, check for loose or
poor contact on the ECT sensor 3P (Gray) con-
nector and recheck the MIL blinking.
1. ECT Sensor Output Voltage Inspection
Connect the test harness to the PCM 33P (Black)
connector (page 6-17).
Turn the ignition switch ON and engine stop
switch " ".
Measure the voltage at the test harness termi-
nals.
CONNECTION: 6 (+) – 10 (–)
STANDARD: 2.7 – 3.1 V (20°C/68°F)
Is the voltage within 2.7 – 3.1 V (20 ° C/68 ° F)?
YES – • Loose or poor contact on the PCM
connector
• Intermittent failure
NO – GO TO STEP 2.
2. ECT Sensor Input Voltage Inspection
Turn the ignition switch OFF.
Disconnect the ECT sensor 3P (Gray) connector.
Turn the ignition switch ON and engine stop
switch " ".
Measure the voltage at the ECT sensor 3P con-
nector of the wire side and ground.
CONNECTION: Pink/white (+) – Ground
STANDARD: 4.75 – 5.25 V
Is the voltage within 4.75 – 5.25 V?
YES – GO TO STEP 5.
NO – GO TO STEP 3.
Line Open Circuit
TEST HARNESS PIN BOX
TEST HARNESS PIN BOX
ECT SENSOR 3P CONNECTOR
(Wire side/female terminals)
FUEL SYSTEM (PGM-FI)
(8)
SENSOR UNIT 5P CONNECTOR
(Wire side/female terminals)
(6)
Pink/white
Yellow/orange
(10)
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