SELVA MARINE Blue Whale 250 EFI, Service Manual

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6P23H11
8-18
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6. Check the intake air pressure using the
YDIS.
7. Apply the negative pressure to the intake
air pressure sensor slowly. Check that
the displayed intake air pressure is var-
ied.
NOTE:
When checking the intake air pressure sen-
sor, do not start the engine.
Checking the engine temperature
sensor
1. Disconnect the engine temperature sen-
sor coupler.
2. Turn the engine start switch to ON.
3. Measure the input voltage at the engine
temperature sensor coupler (wiring har-
ness end). Check the wiring harness if
out of specification.
4. Place the engine temperature sensor in a
container of water and slowly heat the
water.
5. Measure the engine temperature sensor
resistance. Replace if out of specifica-
tion.
Checking the thermoswitch
1. Disconnect the thermoswitch connectors.
2. Turn the engine start switch to ON.
3. Measure the input voltage at the ther-
moswitch connector (wiring harness
end). Check the wiring harness if below
specification.
Vacuum/pressure pump gauge set:
90890-06756
Engine temperature sensor coupler
input voltage (reference data):
Black/yellow (B/Y) – Black (B)
4.75 – 5.25 V
PORT
S6P28636E
Engine temperature sensor
resistance:
Black/yellow (B/Y) –
Black/yellow (B/Y)
at 20 ° C (68 ° F): 54.2 – 69.0 k
Ω
at 100 ° C (212 ° F): 3.12 – 3.48 k
Ω
Thermoswitch input voltage:
Pink (P) – Black (B)
12 V (battery voltage)
S6P28740
S6P28645E
STBD
Ignition and ignition control system