Suzuki VLR1800 Service Manual page 154

1A-85 Engine General Information and Diagnosis:
C41 (Use of mode select switch)
Step
1 1) Turn the ignition switch OFF.
2) Remove the battery and battery holder. Refer to "Battery
/ Battery Holder Removal and Installation in Section 1J
(Page 1J-11)".
3) Check the FP relay coupler (1) for loose or poor
contacts.
If OK, then check the FP relay. Refer to "Fuel Pump
Relay Inspection in Section 1G (Page 1G-6)".
Is the FP relay OK?
P0230-H (Use of SDS)
Step
1 1) Turn the ignition switch OFF.
2) Remove the battery and battery holder. Refer to "Battery
/ Battery Holder Removal and Installation in Section 1J
(Page 1J-11)".
3) Check the FP relay coupler (1) for loose or poor
contacts.
If OK, then check the FP relay. Refer to "Fuel Pump
Relay Inspection in Section 1G (Page 1G-6)".
Is the FP relay OK?
Action
1
I822H1110093-02
Action
1
I822H1110094-02
Yes
• Y/B or O/W wire open
or shorted or poor
"39" connection.
• Y/R or R/Bl wire
open, shorted or poor
"33" connection.
• If wire and
connection are OK,
intermittent trouble or
faulty ECM.
• Recheck each
terminal and wire
harness for open
circuit and poor
connection.
• Replace the ECM
with a known good
one, and inspect it
again. Refer to "ECM
Removal and
Installation in Section
1C (Page 1C-1)".
Yes
• Y/B wire shorted to
power source.
• Y/B wire shorted to
ground.
• If wire and
connection are OK,
intermittent trouble or
faulty ECM.
• Recheck each
terminal and wire
harness for open
circuit and poor
connection.
• Replace the ECM
with a known good
one, and inspect it
again. Refer to "ECM
Removal and
Installation in Section
1C (Page 1C-1)".
No
Replace the FP relay
with a new one.
No
Replace the FP relay
with a new one.