Fail-Safe Function Table - Yamaha F225A Service Manual

Fail-safe function table

Symptom
Engine starting:
Only the cylinders
Incorrect pulser outputting normal
coil signal signal ignite at
BTDC10°, and all
cylinders thereafter.
Incorrect engine
temperature sen- Normal control
sor signal
Incorrect throttle
Ignition timing is
position sensor
fixed to BTDC10°.
signal
Incorrect intake air
temperature sen- Normal control
sor signal
Incorrect neutral
Normal control
switch signal
Incorrect intake air
pressure sensor Normal control
signal
Incorrect oil pres-
Normal control
sure sensor signal
Incorrect shift cut
Normal control
switch signal
Incorrect thermo-
Normal control
switch signal
69J3D11
FAIL-SAFE FUNCTION
Ignition Injection
All cylinders inject
simultaneously
based on the cylin-
der that is output-
ting a normal signal.
Engine temperature
sensor is fixed to
40 °C to activate
normal control.
Correction is made
to the basic injec-
tion map.
Intake air tempera-
ture sensor is fixed
to 40 °C in order to
activate normal
control.
Normal control
Correction is made
to the basic injec-
tion map.
Normal control
Normal control
Normal control
Technical tips
Engine
ISC
condition
Only in neutral: Idle speed
900 r/min increases
Only in neutral: Idle speed
900 r/min increases
Opening angle Idle speed
is fixed to 60%. increases
Only in neutral: Idle speed
900 r/min increases
Normal control Normal control
Only in neutral: Idle speed
900 r/min increases
Only in neutral: Idle speed
900 r/min increases
In neutral:
900 r/min Idle speed
In gear: increases
850 r/min
Only in neutral: Idle speed
900 r/min increases
DIAGNOSIS
1
CODE
13
2
15
3
18
4
23
28
5
29
39
6
45
7
46
8
9
1-20