Suzuki VLR1800 Service Manual page 171

Step
6 1) Turn the ignition switch OFF.
2) Disconnect the EXCVA motor coupler (1).
3) Apply 12 V to the terminals and check the operation of
EXCVA.
4) Then, switch the wires supplied 12 V and check the
operation of EXCVA. (Check the operation of EXCVA in
both way.)
Is the voltage OK?
Action
1
I822H1110117-01
I822H1110118-01
I822H1110119-01
Engine General Information and Diagnosis:
Yes
• Loose or poor
contacts on the
EXCVA or ECM
coupler (terminal "4"
or "3").
• Open or short circuit
in the B/R wire or R/B
wire.
• 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.
1A-102
No
• Replace the EXCVA
with a new one.
• Inspect that the
EXCV and two cables
move smoothly.