Honda GL1800 Service Manual page 163

FUEL SYSTEM (Programmed Fuel Injection)
3. No. 5 Injector Short Circuit Inspection
Check for continuity between the No. 5 injector
terminal and ground.
Is there continuity?
YES
NO
4. No. 5 Injector Power Input Line Inspection
Turn the ignition switch to "ON."
Measure the voltage between the wire harness
side connector terminal of the No. 5 injector and
ground.
Connection: Brown (+) – Ground (–)
Standard: Battery voltage
Does battery voltage exist?
NO
YES
5. No. 5 Injector Control Line Short Circuit
Inspection
Turn the ignition switch to "OFF."
Disconnect the ECM 6P black connector.
Check for continuity between the Pink/white wire
terminal of the wire harness side 6P connector
and ground.
Is there continuity?
YES
NO
6. No. 5 Injector Control Line Continuity Inspection
Check for continuity between the Pink wire ter-
minal of the No. 5 injector 2P connector and the
Pink/white wire terminal of the ECM 6P black
connector.
Is there continuity?
NO
YES
5-32
– Faulty No. 5 injector.
– GO TO STEP 4.
– Open circuit in the Brown wire.
– GO TO STEP 5.
– Short circuit in the Pink or Pink/white
wire.
– GO TO STEP 6.
– Open circuit in the Pink or Pink/white
wire.
– Replace the ECM with a new one and
inspect again.
CM 6P BLACK CONN CTOR
(viewed from the terminal side)
Pink/white