V-Boost System; Troubleshooting - Yamaha VMX12H Supplementary Service Manual

TROUBLESHOOTING

Troubleshooting Chart (1)
When the main switch is turned on, the
butterfly valves operate one cycle.
Check the battery voltage
n
When the main switch is turned on after
the control cable is disconnected, the
servo motor operate one cycle.
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Check each couplers, lead connections
and fuse.
Check for the servo motor condition.
Replace the V-boost valve control unit.
OK
NO
0 16V).
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NO
NU
Poor condition
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V-BOOST SYSTEM

Refer to "Troubleshooting Chart
section.
Recharge the battery.
Check butterfly valves and control cable
for mechanical faults. Correct any.
Correct.
Replace the servo motor.
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