Checking The Ecm; Checking The Pulser Coil; Checking The Throttle Position Sensor - Yamaha F200C Service Manual

Checking the ECM

1. Remove the ignition coil cover and dis-
connect the ignition coil coupler.
2. Connect the test harness (2 pins) to the
ignition coil.
3. Measure the ECM output peak voltage. If
below specification, measure the pulser
coil output peak voltage. Replace the
ECM if the output peak voltage of the
pulser coil is above specification.
Digital multimeter: YU-34899-A
Peak voltage adaptor: YU-39991
Test harness (2 pins): YB-06792
ECM output peak voltage:
Black/orange (B/O) – Ground
Black/yellow (B/Y) – Ground
Black/white (B/W) – Ground
Loaded
r/min
Cranking
DC V 252

Checking the pulser coil

1. Remove the flywheel magnet cover and
disconnect the pulser coil coupler.
2. Connect the test harness (4 pins) to the
pulser coil.
4. Measure the throttle position sensor out-
put voltage. Adjust the throttle position
sensor if out of specification.
69J1D11
S69J8180
1,500 3,500
260 260
Ignition and ignition control system
3. Measure the pulser coil output peak volt-
age. Replace the pulser coil if below
specification.
Digital multimeter: YU-34899-A
Peak voltage adaptor: YU-39991
Test harness (4 pins): YB-06771
Pulser coil output peak voltage:
White/red (W/R) – Black (B)
White/black (W/B) – Black (B)
White/green (W/G) – Black (B)
Unloaded
r/min
Cranking
DC V 5.3
Pulser coil resistance (use as
reference):
White/red (W/R) – Black (B)
White/black (W/B) – Black (B)
White/green (W/G) – Black (B)
459–561 Ω at 20 °C (68 °F)
Checking the throttle position
sensor
1. Connect the test harness (3 pins) to the
throttle position sensor.
2. Turn the engine start switch to ON.
3. Measure the throttle position sensor
input voltage. Replace the ECM if out of
specification.
S69J8190
Loaded
1,500 3,500
5.3 20 43
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