Yamaha VMX12H Supplementary Service Manual page 333

IGNITION SYSTEM
Removal
1. Remove:
cover
(left)
component board
2. Disconnect:
connector
hose
3. Remove:
sensor
Inspection
1. Connect:
Tester
2.
Measure:
voltage
Out of specification
Output Voltage: About 2.0
Output voltage
Atmospheric pressure
Pressure
Installation
1. Install:
sensor
Reverse the removal procedure.
Replace.
DC
Volt
7-30