Yamaha VMX12H Supplementary Service Manual page 329

Troubleshooting Chart
Check the entire ignition for connections.
Measure the battery voltage and ,specific
gravity.
Battery voltage: More than 12V
Specific gravity: 1,280
"ON". Check for voltage
lead a t the TCI unit and ignition coils.
I
Measure the pickup coils resistance.
Pickup coil: 1 15% a t 20°C (68"
-
(Orange Black) (Orange
-
(Orange Wh
-
(Orange
Check the ignition coils for resistance (primary and secondary).
Primarv: 10% a t 20°C
TCI unit is faulty, replace the unit.
Faulty
I
No
2V) on the
No
No
-
Gray)
IGNITION SYSTEM
Correct.
Recharge the battery.
Check the fuse "IGNITION"
and wiring circuit.
Replace the pickup coil assembly.
Secondary: 13.2
13.2
100
I
Replace the ignition
1
I
5A)
I
20% a t 20°C (68°F)
No
I
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