Checking The Charge Coil - Yamaha 250GETO Service Manual

ELEC
7. Remove the engine temperature sensor.
8. Place the engine temperature sensor in a
container of water and slowly heat the
water.
9. Measure the engine temperature sensor
resistance. Replace the engine tempera-
ture sensor if out of specification.
Engine temperature sensor resis-
tance:
Black/yellow (B/Y) –
Black/yellow (B/Y)
at 5°C (41°F): 128 kΩ (reference)
at 20°C (68°F): 54.2 – 69.0 kΩ
at 100°C (212°F): 3.12 – 3.48 kΩ
8-13
Electrical system
S6P28740

Checking the charge coil

1. Remove the CDI unit cover.
2. Connect the test harness to the charge
coil.
3. Measure the charge coil output peak volt-
age. Replace the stator assembly if less
than specification.
R B/R
Br
L
Br L
R
B/R
Test harness (4 pins): 90890-06871
Charge coil output peak voltage:
Red (R) – Brown (Br)
Black/red (B/R) – Blue (L)
Unloaded
r/min
Cranking
DC V 120
4. Disconnect the charge coil coupler.
5. Connect the digital circuit tester to the
charge coil coupler (charge coil side).
6S380140
Loaded
1,500 3,500
150 170 170
6S35H11