Yamaha 2012 TMAX XP500A Service Manual page 451

IMMOBILIZER SYSTEM
4. Frame ground
5. Joint
6. Main switch
7. Immobilizer unit
8. Joint coupler
13.Backup fuse
16.Ignition fuse
19.Battery
20.Negative lead
21.Main fuse
39.ECU (engine control unit)
50.Diagnostic tool coupler
82.Meter assembly
83.Immobilizer system indicator light
92.Multi-function meter
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