Yamaha WR450F(V) Owner's Service Manual page 734

SIGNALING SYSTEM
3. Measure:
• Multi-function display output voltage
Out of specification → Replace multi-
function display.
Tester (+) lead → Red lead 1
Tester (–) lead → Black/White lead 2
Multi-function dis-
play output voltage
4.5 V or more
CAUTION:
Make sure that a short-circuit does not
develop between the terminals because it
may cause damage to electrical compo-
nents.
SPEED SENSOR OUTPUT VOLTAGE
INSPECTION
1. Insert the thin electric conductors 1 (lead)
into the speed sensor coupler 2, as
shown, and connect the tester to them.
Tester (+) lead → White lead 3
Tester (–) lead → Black lead 4
CAUTION:
• Do not insert the electric conductors
more than required because it may
reduce the waterproof function of the
coupler.
• Make sure that a short-circuit does not
develop between the terminals because it
may cause damage to electrical compo-
nents.
2. Set the main switch to "ON".
6 - 28
– +
ELEC
Tester selec-
tor position
DCV-20