Checking The Intake Air Pressure Sensor; Checking The Engine Temperature Sensor - SELVA MARINE Grey Whale 200 EFI Service Manual

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10. Install the intake air temperature sensor,
and then connect the intake air tempera-
ture sensor coupler.
Checking the intake air pressure
sensor
1. Disconnect the intake air pressure sen-
sor coupler.
2. Turn the engine start switch to "ON," and
then measure the input voltage at the
intake air pressure sensor coupler (wiring
harness end). Check the wiring harness
if out of specification.
PORT
Intake air pressure sensor input
voltage (reference data):
Orange (O) – Black (B)
4.75–5.25 V
3. Turn the engine start switch to "OFF."
4. Remove the intake air pressure sensor,
and then connect the coupler.
5. Connect the special service tool.
Vacuum/pressure pump gauge set:
90890-06756
8-21
Electrical system
P/G B O
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6. Check the intake air pressure using the
YDIS.
NOTE:
To connect and operate the YDIS, see Chap-
ter 9, "YDIS" and the YDIS (Ver. 1.23a or
later) Instruction Manual.
7. Apply negative pressure to the intake air
pressure sensor slowly, and check that
the displayed intake air pressure is var-
ied.
NOTE:
When checking the intake air pressure sen-
sor, do not start the engine.
8. Disconnect the special service tool.
9. Install the intake air pressure sensor, and
then connect the coupler.
Checking the engine temperature
sensor
1. Disconnect the engine temperature sen-
sor coupler.
2. Turn the engine start switch to "ON," and
then measure the input voltage at the
engine temperature sensor coupler (wir-
ing harness end). Check the wiring har-
ness if out of specification.
PORT
B B/Y
Engine temperature sensor coupler
input voltage (reference data):
Black/yellow (B/Y) – Black (B)
4.75–5.25 V
3. Turn the engine start switch to "OFF."
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