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4-22 FI SYSTEM DIAGNOSIS
The engine can start and can run even if the above signal is not received from each sensor. But, the engine
running condition is not complete, providing only emergency help (by fail-safe circuit). In this case, it is nec-
essary to bring the motorcycle to the workshop for complete repair.
When two ignition signals or two injector signals are not received by ECM, the fail-safe circuit can not work
and ignition or injection is stopped.
ITEM FAIL-SAFE MODE
STARTING
ABILITY
RUNNING
ABILITY
Secondary injection signal #1 Fuel-cut (secondary side) — “YES”
#2, #3 & #4 cylinders can run.
#2 Fuel-cut (secondary side) — “YES”
#1, #3 & #4 cylinders can run.
#3 Fuel-cut (secondary side) — “YES”
#1, #2 & #4 cylinders can run.
#4 Fuel-cut (secondary side) — “YES”
#1, #2 & #3 cylinders can run.
Secondary throttle valve
actuator
Secondary throttle valve is fixed to
full close position. When motor dis-
connection or lock occurs, power
from ECM is shut off.
“YES” “YES”
STP sensor Secondary throttle valve is fixed to
full close position.
“YES” “YES”
Gear position signal Gear position signal is fixed to 6th
gear.
“YES” “YES”
HO2 sensor
(For E-02, 19)
Feedback compensation is inhibited.
(Air/fuel ratio is fixed to normal.)
“YES” “YES”
PAIR control solenoid valve ECM stops controlling PAIR control
solenoid valve.
“YES” “YES”
EXCV actuator EXCV actuator is fixed to full open
position. When motor disconnection
or lock occurs, power from ECM is
shut off.
“YES” “YES”