Ecm (Engine Control Module) Power/Ground Line Inspection; Secondary Air Supply System Inspection; Ground Line; Power Input Line - Honda GL1800 Service Manual

ECM (ENGINE CONTROL MODULE)
POWER/GROUND LINE INSPECTION
Connect the test harness set to the ECM connectors
(page 5-11).

GROUND LINE

Check for continuity between the test pin box No. 9
terminal and ground, between the No. 19 terminal
and ground, and between the No. 20 terminal and
ground.
There should be continuity at all times.
If there is no continuity, check for an open circuit in
the green wires.

POWER INPUT LINE

Turn the ignition switch to "ON" with the engine
stop switch turned to " ."
Measure the voltage between the test pin box No. 1
terminal and ground.
There should be battery voltage.
If there is no voltage, check for an open circuit in
Black/yellow wire between the ECM and PGM-FI
ignition relay.
If the wire is OK, check the PGM-FI ignition relay cir-
cuits (page 18-11).
SECONDARY AIR SUPPLY SYSTEM
SYSTEM INSPECTION
Start the engine and warm it up to normal operating
temperature.
Remove the air cleaner element (page 3-6).
Check that the secondary air intake port is clean and
free of carbon deposits.
If there is carbon in the air intake port, check the
pulse secondary air injection (PAIR) check valves.
FUEL SYSTEM (Programmed Fuel Injection)
o. 20
o. 19
o. 1
o. 9
IR INT KE PORT
5-71