Checking The Pulser Coil - Yamaha F225F Service Manual

ELEC
Wiring harness continuity:
Ignition coil #1
Terminal 1–Terminal 106
Terminal 2–Ground
Terminal 3–Terminal 18
Ignition coil #2
Terminal 1–Terminal 98
Terminal 2–Ground
Terminal 3–Terminal 18
Ignition coil #3
Terminal 1–Terminal 110
Terminal 2–Ground
Terminal 3–Terminal 18
Ignition coil #4
Terminal 1–Terminal 102
Terminal 2–Ground
Terminal 3–Terminal 18
Ignition coil #5
Terminal 1–Terminal 100
Terminal 2–Ground
Terminal 3–Terminal 18
Ignition coil #6
Terminal 1–Terminal 101
Terminal 2–Ground
Terminal 3–Terminal 18
7. Connect the fuse holder coupler c, and
then install the fuse holder a.
8. Install the intake manifold (STBD). See
"Installing the intake manifold" (6-16).
9. Connect the engine ECM coupler b and
ignition coil couplers a.

Checking the pulser coil

1. Disconnect the pulser coil coupler a.
2. Connect the special service tool a.
5-47
Electrical system
a
3. Measure the pulser coil output peak
voltage.
W/B
B
G
a
a
Test harness (2 pins) a: 90890-06867
Pulser coil output peak voltage:
White/Red (W/R)–Black (B)
Unload
ed
r/min
Cranking
DC V 7.6
TIP:
• When measuring the pulser coil output
peak voltage under the cranking (unloaded)
condition, disconnect the coupler a to pre-
vent the engine from starting.
• When measuring the pulser coil output
peak voltage under the cranking (loaded)
condition, remove the clip from the engine
shut-off switch to prevent the engine from
starting.
4. Disconnect the special service tool a.
5. Measure the pulser coil resistance.
Pulser coil resistance:
White/Red (W/R)–Black (B)
396.0–594.0 Ω at 20 °C (68 °F)
6. Disconnect the engine ECM couplers b
and c.
W/R
B
G/W
a
a
Loaded
1500 3500
6.9 23.9 25.1