Dtc Troubleshooting (Nss250A) - Honda NSS250S Manual

FUEL SYSTEM (PGM-FI)
4. IACV Resistance Inspection
Measure the resistance at the IACV 4P connector
terminals.
CONNECTION:
Gray/red – Light green/red
Brown/red – Black/red
STANDARD:
110 – 150 Ω (25°C/77°F)
Is the resistance within 110 – 150 Ω (25 ° C/77 ° F)?
YES
NO
DTC 33-2 (EEPROM)
1. Recheck DTC
Erase the DTC's (page 6-16).
Turn the ignition switch ON and engine stop
switch " ", then start the engine and check the
injector with the HDS pocket tester.
Recheck the ECM EEPROM.
Is the DTC 33-2 indicated?
YES
NO

DTC TROUBLESHOOTING (NSS250A)

DTC 1-1 (MAP SENSOR LOW
VOLTAGE)
1. MAP Sensor System Inspection
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
2. Sensor Unit Power Line Inspection
Check the sensor unit power line inspection
(page 6-22).
Is the sensor unit power line normal?
YES
NO
6-36
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– Replace the ECM with a known good
one, and recheck.
– Faulty IACV
– Replace the ECM with a known good
one, and recheck.
– Intermittent failure
– GO TO STEP 2.
– Intermittent failure
– GO TO STEP 3.
– Replace or repair the abnormal circuit.
IACV 4P CONNECTOR
(IACV side/male terminals)
Light green/red Gray/red
Brown/red Black/red