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ELEC
IGNITION SYSTEM
2. Measure:
• Pickup coil output peak voltage
Below specification → Replace the
pickup coil.
Above specification → Replace the
ECM.
Test harness (3 pins):
New: YB-06877
Current: YB-06777
Test harness HM090-3 (3 pins):
New: 90890-06877
Current: 90890-06777
Pickup coil output peak voltage:
White (W) – Black (B)
Red (R) – Black (B)
Unloaded
r/min
Cranking
V
5.2
NOTE:
To crank the engine, connect the engine shut-
off cord (lanyard) to the engine shut-off switch,
and then press the start switch and engine
stop switch simultaneously.
3. Measure:
• Lighting coil output peak voltage
Below specification → Replace the light-
ing coil.
Test harness (3 pins):
New: YB-06870
Current: YB-06770
Test harness SMT250-3 (3 pins):
New: 90890-06870
Current: 90890-06770
Lighting coil output peak voltage:
Green (G) – Green (G)
r/min
Cranking
V
9.2
7-16
Loaded
2,000
3,500
4.7
26.1
41.3
Unloaded
2,000
3,500
38.5
63.2
E
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