Yamaha Z200N Service Manual page 342

– +
ELEC
IGNITION CONTROL SYSTEM
MEASURING THE ENGINE COOLING
WATER TEMPERATURE SENSOR
RESISTANCE
Measure:
• Engine cooling water temperature
sensor resistance
Out of specification → Replace.
Engine cooling water
temperature sensor resistance
Black/yellow (B/Y) –
Black/yellow (B/Y)
5 ˚C (41 ˚F): 128 k Ω
20 ˚C (68 ˚F): 54 - 69 k Ω
100 ˚C (212 ˚F): 3.02 - 3.48 k Ω
Measuring steps
(1) Place the engine cooling water tem-
perature sensor in a container filled
with water.
(2) Place a thermometer in the water.
(3) Slowly heat the water.
(4) Measure the resistance when the spec-
ified temperature is reached.
CHECKING THE THERMO SWITCH
CONTINUITY
Check:
• Thermo switch continuity
Out of specification → Replace.
Thermo switch continuity
temperature
Pink (P) – Black (B)
a 84 - 90 ˚C (183 - 194 ˚F)
b 60 - 74 ˚C (140 - 165 ˚F)
1 No continuity
2 Continuity
Measuring steps
(1) Place the thermo switch in a container
filled with water.
(2) Place a thermometer in the water.
(3) Slowly heat the water.
(4) Measure the continuity when the spec-
ified temperature is reached.
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