Honda NSS250S Manual page 180

FUEL SYSTEM (PGM-FI)
3. MAP Sensor System Inspection 2
Turn the ignition switch OFF.
Disconnect the sensor unit 5P (Black) connector.
Connect the sensor unit 5P connector terminals
at the wire side with a jumper wire.
CONNECTION: Yellow/orange – Green/orange
Turn the ignition switch ON and engine stop
switch " ".
Check the MAP sensor with the HDS pocket
tester.
Is about 0 V indicated?
YES
NO
4. MAP
Inspection
Turn the ignition switch OFF.
Remove the jumper wire.
Disconnect the ECM 33P (Black) connector.
Check the continuity at the Yellow/orange wire
between the sensor unit 5P and ECM 33P con-
nectors.
TOOL:
Test probe
CONNECTION: Yellow/orange – Yellow/orange
Is there continuity?
YES
NO
DTC 7-1 (ECT SENSOR LOW
VOLTAGE)
1. ECT Sensor System Inspection
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
2. ECT Sensor Inspection
Turn the ignition switch OFF.
Disconnect the ECT sensor 3P (Gray) connector.
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
6-26
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– Faulty sensor unit (MAP sensor)
– GO TO STEP 4.
Sensor Output Line
07ZAJ-RDJA110
– Replace the ECM with a known good
one, and recheck.
– Open circuit in Yellow/orange wire
– Intermittent failure
– GO TO STEP 2.
– GO TO STEP 4.
– GO TO STEP 3.
SENSOR UNIT 5P CONNECTOR
(Wire side/female terminals)
Green/orange
Open Circuit
ECM 33P CONNECTOR
(Wire side/female terminals)
Yellow/orange
JUMPER WIRE
Yellow/orange
Yellow/orange
SENSOR UNIT 5P CONNECTOR
(Wire side/female terminals)