Fail-Safe Function Table - Suzuki GSX-R750 Service Manual

Fail-Safe Function Table

FI system is provided with fail-safe function to allow the engine to start and the motorcycle to run in a minimum
performance necessary even under malfunction condition.
Item
CMP sensor
IAP sensor
TP sensor
ECT sensor
IAT sensor
AP sensor
Ignition signal
Primary injection signal
Secondary injection signal
STV actuator
STP sensor
Gear position signal
HO2 sensor
PAIR control solenoid valve
EXCV actuator
ISC valve
Fail-Safe Mode
When camshaft position signal has failed
during running, the ECM determines the
cylinder positions as # to be the same as
before occurrence of such a failure.
Intake air pressure value is fixed to 101 KPa
(760 mmHg).
The throttle opening is fixed to full open
position.
Ignition timing is also fixed.
Engine coolant temperature value is fixed to
80 °C (176 °F).
Cooling fan is fixed on position.
Intake air temperature value is fixed to 40 °C
(104 °F).
Atmospheric pressure is fixed to 101 kPa
(760 mmHg).
#1 fuel-cut
(primary side and secondary side)
#2 fuel-cut
(primary side and secondary side)
#3 fuel-cut
(primary side and secondary side)
#4 fuel-cut
(primary side and secondary side)
—
—
—
—
—
—
—
—
Secondary throttle valve is fixed to full close
position. When motor disconnection or lock
occurs, power from ECM is shut off.
Secondary throttle valve is fixed to full open
position.
Gear position signal is fixed to 6th gear.
Feedback compensation is inhibited. (Air/
fuel ratio is fixed to normal.)
ECM stops controlling PAIR control solenoid
valve.
EXCV actuator is fixed to full open position.
When motor disconnection or lock occurs,
power from ECM is shut off.
When motor disconnection or lock occurs,
power from ECM is shut off.
Engine General Information and Diagnosis:
Starting Ability
"NO"
Motorcycle can run, but once engine
stops, engine can not start.
"YES"
"YES"
"YES"
"YES"
"YES"
"YES"
#2, #3 & #4 cylinders can run.
"YES"
#1, #3 & #4 cylinders can run.
"YES"
#1, #2 & #4 cylinders can run.
"YES"
#1, #2 & #3 cylinders can run.
"YES"
#2, #3 & #4 cylinders can run.
"YES"
#1, #3 & #4 cylinders can run.
"YES"
#1, #2 & #4 cylinders can run.
"YES"
#1, #2 & #3 cylinders can run.
—
#2, #3 & #4 cylinders can run.
—
#1, #3 & #4 cylinders can run.
—
#1, #2 & #4 cylinders can run.
—
#1, #2 & #3 cylinders can run.
"YES"
"YES"
"YES"
"YES"
"YES"
"YES"
"YES"
1A-23
B838H21104007
Running Ability
"YES"
"YES"
"YES"
"YES"
"YES"
"YES"
"YES"
"YES"
"YES"
"YES"
"YES"
"YES"
"YES"
"YES"
"YES"
"YES"
"YES"
"YES"
"YES"
"YES"
"YES"
"YES"
"YES"
"YES"
"YES"