Yamaha YP400T Service Manual page 372

2. V-belt replacement indicator reset coupler
• Connect the pocket tester (Ω × 1) to the V-
belt replacement indicator reset coupler as
shown.
• Check the V-belt replacement indicator
reset coupler for continuity.
Positive tester probe → black 1
Negative tester probe → black 2
1
B
• Is the V-belt replacement indicator reset
coupler OK?
YES
SIGNALING SYSTEM
2
B
NO
Replace the V-belt
replacement indica-
tor reset coupler.
8 - 41
3. Voltage
• Connect the pocket tester (DC 20 V) to the
meter assembly coupler (wire harness
side) as shown.
Positive tester probe → gray 1
Negative tester probe → ground
Ch Dg Y
L
• Set the main switch to "ON".
• Measure the voltage (12 V) of gray 1 at
the meter assembly coupler.
• Is the voltage within specification?
YES
Replace the meter
assembly.
– +
ELEC
R/W R/G G
Y/L B/L Gy B
1
NO
The wiring circuit
from the V-belt
replacement indica-
tor reset coupler to
the meter assembly
coupler (wire harness
side) is faulty and
must be repaired.