Yamaha YP400T 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
b
• Is the lean angle cut-off switch OK?
YES
a
ON
NO
Replace the lean
angle cut-off switch.
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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?
YES
Replace the ECU.
– +
ELEC
NO
Properly connect or
repair the ignition
system's wiring.