Yamaha RS90GTZ Service Manual page 349

Fault code No. 25
Diagnostic code No. d:04 (intake air pressure sensor 2 (cylinder #1))
Item/components and probable cause
Order
Connections
• Intake air pressure sensor 2 (cylinder
1 #1) coupler
• Wire harness ECU coupler
Open or short circuit in wire harness.
2
FUEL INJECTION SYSTEM
Symptom Intake air pressure sensor 2 (cylinder #1): open or short circuit detected.
Check or maintenance job
Check the couplers for any pins that may have
pulled out.
Check the locking condition of the couplers.
If there is a malfunction, repair it and connect the
coupler securely.
Repair or replace if there is an open or short circuit.
Between the intake air pressure sensor 2 (cylinder
#1) coupler and ECU coupler.
Black/Blue – Black/Blue
Pink/Black – Pink/Black
Blue – Blue
7-22
FI
Reinstate-
ment method
Setting the
engine stop
switch to
"RUN" and
turning the
main switch
on.