Yamaha FZ 25 2021 Supplementary Service Manual page 188

Fault code No.
Symptoms
Diagnostic code No.
Item and components and
Item
probable cause
1 Connection of O
pler.
Check the locking condition of
the coupler.
Disconnect the coupler and
check the pins (bent or broken
terminals and locking condition
of the pins).
2 Connection of main harness
ECU coupler.
Check the locking condition of
the coupler.
Disconnect the coupler and
check the pins (bent or broken
terminals and locking condition
of the pins).
3 Harness continuity
SELF-DIAGNOSTIC FUNCTION AND
DIAGNOSTIC CODE TABLE
P0030
Faulty O sensor heater operation
2
Defective connections  Re-
sensor cou-
2
connect or replace the harness.
Defective connections  Re-
connect or replace the harness.
Open or short circuit  Recon-
nect or replace the harness.
Between O
O sensor and fuse box
2
Actions
sensor and ECU
2
6-58
ELEC
Confirmation procedure after
actions
Turn the main switch to "ON",
and then check the condition of
the fault code in diagnostic
mode of the Yamaha diagnostic
tool.
Condition is Recovered  Go to
item 6 and finish the service.
Condition is Detected  Start
EG and check the condition of
the fault code
Condition is Recovered  Go to
item 6 and finish the service.
Condition is Detected  Go to
item 2.
Note: At this time, check with
the engine stop switch "ON".
Turn the main switch to "ON",
and then check the condition of
the fault code in diagnostic
mode of the Yamaha diagnostic
tool.
Condition is Recovered  Go to
item 6 and finish the service.
Condition is Detected  Start
EG and check the condition of
the fault code
Condition is Recovered  Go to
item 6 and finish the service.
Condition is Detected  Go to
item 3.
Note: At this time, check with
the engine stop switch "ON".
Turn the main switch to "ON",
and then check the condition of
the fault code in diagnostic
mode of the Yamaha diagnostic
tool.
Condition is Recovered  Go to
item 6 and finish the service.
Condition is Detected  Start
EG and check the condition of
the fault code
Condition is Recovered  Go to
item 6 and finish the service.
Condition is Detected  Go to
item 4.
Note: At this time, check with
the engine stop switch "ON".
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