Mil 11 Blinks (Vehicle Speed Sensor) - Honda GL1800 Service Manual

FUEL SYSTEM (Programmed Fuel Injection)
5. BARO Sensor Voltage at ECM
Turn the ignition switch to "OFF."
Connect the BARO sensor 3P connector.
Connect the test harness set to the ECM connec-
tors (page 5-11).
Turn the ignition switch to "ON."
Measure the voltage at the test pin box
terminals.
Connection: No. 49 (+) – No. 8 (–)
Standard: 2.7 – 3.1 V (at 760 mm Hg/1,013 hPa)
Is the voltage within 2.7 – 3.1 V (at 760 mm Hg/
1,013 hPa)?
NO
YES

MIL 11 BLINKS (VEHICLE SPEED SENSOR)

1. Vehicle Speed Sensor Connection Inspection
Remove the top shelter (page 2-12).
Turn the ignition switch to "OFF."
Disconnect
connector.
Check the connector for loose contacts or cor-
roded terminals.
Connect the vehicle speed sensor 3P connector
and install the removed parts.
Run the motorcycle with the engine speed more
than 2,100 rpm for 20 seconds or more.
Let the engine idle and lower the side stand.
Check that the MIL blinks.
Is the MIL blinking?
NO
YES
2. Vehicle Speed Sensor Input Line Voltage
Inspection
Turn the ignition switch to "OFF."
Remove the top shelter (page 2-12) and discon-
nect the vehicle speed sensor 3P connector.
Turn the ignition switch to "ON."
Measure the voltage between the wire harness
side 3P connector terminal and ground.
Connection: Brown/white (+) – Ground (–)
Standard: Battery voltage
Does battery voltage exist?
NO
YES
5-24
– Faulty BARO sensor.
– Replace the ECM with a new one and
inspect again.
the vehicle speed
– Temporary failure; the
normal.
– GO TO STEP 2.
– Open or short circuit in the Brown/white
wire.
– GO TO STEP 3.
No. 8 (–)
No. 49 (+)
sensor 3P
system is
Brown/white White/black
reen
SPEED SENSOR
CONNECTOR