Checking The Pulser Coil; Checking The Throttle Position Sensor - Yamaha F100C Service Manual

Checking the pulser coil

1. Measure the pulser coil output peak volt-
age. Replace the pulser coil if below
specification.
NOTE:
• Use the peak voltage adaptor with the digi-
tal circuit tester.
• When measuring the peak voltage, set the
selector on the digital circuit tester to the
DC voltage mode.
Digital circuit tester: 90890-03174
Peak voltage adaptor: 90890-03172
Test harness (6 pins): 90890-06772
60C5D11
Ignition system and ignition control system
r/min
DC V
Checking the throttle position
sensor
1. Start the engine and warm it up 5 min-
utes to check the stability of the engine.
2. Measure the throttle position sensor
input voltage. Replace the CDI unit if out
of specification.
3. Measure the throttle position sensor out-
S60C8140
put voltage. Replace the CDI unit if out of
specification.
Pulser coil output peak voltage:
White/red (W/R) – Black (B)
White/black (W/B) – Black (B)
Unloaded Loaded
Cranking 1,500
3.5 2.5 9.0
Pulser coil resistance (use as
reference):
White/red (W/R) – Black (B)
White/black (W/B) – Black (B)
445–545 Ω at 20 °C (68 °F)
Test harness (3 pins): 90890-06757
1
3,500
14.0
2
3
4
5
6
7
8
9
S60C8160
8-10