Ecm Power/Ground Circuit; Inspection - Honda LEAD 110 2009 Service Manual

ECM POWER/GROUND CIRCUIT

INSPECTION

ENGINE DOES NOT START (MIL DOES
NOT BLINK)
1. Connector inspection
• Before starting the inspection, check for battery voltage.
Turn the ignition switch "OFF".
Disconnect the ECM 33P connector.
Check for loose or poor contact on the ECM 33P
connector.
Connect the ECM 33P connector.
Turn the ignition switch "ON".
Crank the engine with the starter motor.
Does the engine start?
YES
NO
2. ECM Ground Line Inspection
Turn the ignition switch "OFF".
Disconnect the ECM 33P connector.
Check for continuity between the ECM 33P con-
nector of the wire harness side and ground.
CONNECTION: Green – Ground
Is there continuity?
NO
YES
3. ECM Power Line Inspection
Turn the ignition switch "ON".
Measure the voltage between the ECM 33P con-
nector of the wire harness side and ground.
CONNECTION: Black/White (+) – Ground (–)
Does the battery voltage exist?
YES
NO
– Loose or poor contact on the ECM 33P
connector.
– GO TO STEP 2.
Green/Pink – Ground
– • Open circuit in Green wire.
• Open circuit in Green/Pink wire.
– GO TO STEP 3.
– Replace the ECM with a new one, and
recheck.
– GO TO STEP 4.
FUEL SYSTEM (Programmed Fuel Injection)
ECM
ECM
ECM
33P CONNECTOR
33P CONNECTOR
33P CONNECTOR
6-19