Honda GL1800 Service Manual page 169

FUEL SYSTEM (Programmed Fuel Injection)
3. Right
Inspection
Connect the test harness set to the ECM connec-
tors (page 5-10).
Check for continuity between the wire harness
side O
terminals.
Connection: Black/red – No. 39
Is there continuity?
NO
YES
4. Right
Inspection
Check for continuity between the wire harness
side O
terminals.
Connection: Green/red – No.8
Is there continuity?
NO
YES
5. Right O
Connect the right O
Start the engine, snap it from idle to 5,000 rpm
and measure the voltage between the test pin
box terminals.
Connection: No. 39 (+) – No. 8 (–)
Standard:
0.6 V minimum (with throttle wide open)
0.4 V maximum (with throttle quickly closed)
Is the voltage within the standard value?
NO
YES
5-38
O Sensor Signal Line
2
sensor 4P connector and test pin box
2
– Open circuit in the Black/red wire.
– GO TO STEP 4.
O Sensor Ground Line
2
sensor 4P connector and test pin box
2
– Open circuit in the Green/red wire.
– GO TO STEP 5.
Sensor Output Voltage Inspection
2
sensor 4P connector.
2
– Faulty right O sensor
2
– Check the fuel supply system. If the sys-
tem is normal, replace the ECM with a
new one and inspect again.
Continuity
No. 39
Continuity
No. 8
No. 8 (–)
No. 39 (+)
Black/red
SENS R C NNECT R
2
(viewed from the terminal side)
Green/red
SENS R C NNECT R
2
(viewed from the terminal side)