Yamaha YP400T, YP400V, YP400W Service Manual page 344

12.Lean angle cut-off switch
• Remove the lean angle cut-off switch.
• Connect the pocket tester (Ω × 1) to the
lean angle cut-off switch terminals as
shown.
Positive tester probe → blue 1
Negative tester probe → yellow/green 2
Lean angle cut-off switch voltage
Less than 45° a →
Approximately 1 V
More than 45° b →
Approximately 4 V
a
ON
• Is the lean angle cut-off switch OK?
YES
a
ON
b
NO
Replace the lean
angle cut-off switch.
IGNITION SYSTEM
EAS00754
13.Wiring
• Check the entire ignition system's wiring.
Refer to "CIRCUIT DIAGRAM".
• Is the ignition system's wiring properly
connected and without defects?
Replace the ECU.
8 - 13
ELEC
YES
Properly connect or
repair the
system's wiring.
– +
NO
ignition