Honda GOLDWING GL1800, Service Manual

Page: 198 / 757

FUEL SYSTEM (Programmed Fuel Injection)
5-67
4. Turn the ignition switch to “OFF.”
Measure the voltage between the Black/yellow
wire terminal (+) and Brown/black wire terminal
of the fuel pump relay connector.
Turn the ignition switch to “ON.”
There should be battery voltage for a few
seconds.
• If there is battery voltage for a few seconds,
the system is OK; check for loose contacts or
corroded terminals.
• If there is no voltage, GO TO STEP 5.
5. Turn the ignition switch to “OFF.”
Remove the top shelter (page 2-11).
Disconnect the ECM 22P black connector.
Check the connector for loose contacts or cor-
roded terminals.
Check for continuity between the Brown/black
wire terminals of the fuel pump relay and ECM
22P black connectors.
There should be continuity.
• If there is no continuity, repair the open circuit
in the Brown/black wire.
• If there is continuity, replace the ECM with a
new one and inspect again.
BARO/MAP SENSORS
OUTPUT VOLTAGE INSPECTION
Connect the ECM test harness to the ECM connec-
tors (page 5-11).
Turn the ignition switch to “ON” and engine stop
switch to “ .”
Measure the voltage at the ECM test harness con-
nector terminals (page 5-11).
The output voltage (above) is measured under the
standard atmosphere (1 atm = 1,030 hPa).
The output voltage is changed by altitude as shown
in the chart, because it varies in accordance with the
atmospheric pressure.
FUEL PUMP RELAY
CONNECTOR
Brown/black
ECM 22P BLACK CONNECTOR
(viewed from the terminal side)
CONNECTION:
BARO sensor: B15 (+) – C4 (–)
MAP sensor: B4 (+) – C4 (–)
STANDARD: 2.7 – 3.1 V
2.1
2.5
2.46
2.6
2.763
:m
(feet)
2,000
(6,600)
1,500
(4,950)
1,000
(3,300)
500
(1,650)
0
3.5
0.5
1.0
1.5
2.0
2.5
2.7
3.0
3.1