Yamaha F30B 2018, Service Manual

Page: 98 / 348

5-20
Engine control unit and component
c. Turn the engine start switch to ON, and
then measure the TPS output voltage
when the remote control lever is at the fully
closed position.
d. Turn the engine start switch to OFF.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
2. Measure:
• TPS input voltage
Out of specification

Check the wire har-
ness for continuity.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Disconnect the throttle body coupler “a”.
b. Turn the engine start switch to ON, and
then measure the TPS input voltage at the
TPS coupler.
c. Turn the engine start switch to OFF.
d. Connect the throttle body coupler.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
Checking the I S C valve
1. Check:
• ISC valve operation (using the YDIS “Sta-
tionary test”)
No operating sound

Check the wire har-
ness for continuity.
2. Check:
• ISC valve operation (using the YDIS “Ac-
tive test”)
No change in engine speed

Replace
the throttle body.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Start the engine, and then check that the
engine speed increases using the YDIS
“Active test”.
b. Stop the engine.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
Checking the oil pressure switch
1. Measure:
• Oil pressure switch input voltage
Out of specification

Check the wire har-
ness for continuity.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Disconnect the oil pressure switch lead
“a”.
b. Turn the engine start switch to ON, and
then measure the oil pressure switch input
voltage.
c. Turn the engine start switch to OFF.
d. Connect the oil pressure lead. See “Wire
harness” (7-20).
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
2. Check:
• Oil pressure switch continuity
Out of specification

Replace.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Remove the oil pressure switch “1”.
b. Connect the special service tool “2” to the
oil pressure switch “1”.
Input voltage
5 V
Orange (Or)–Black (B)
Or B
a
Oil pressure switch input voltage
12 V
Pink/White (P/W)–Ground
a
a