Fail-Safe Function - Suzuki GSR600 Service Manual

4-20 FI SYSTEM DIAGNOSIS

FAIL-SAFE FUNCTION

FI system is provided with fail-safe function to allow the engine to start and the motorcycle to run in a mini-
mum performance necessary even under malfunction condition.
ITEM
CMP sensor
IAP sensor
TP sensor
ECT sensor
IAT sensor
AP sensor
Ignition signal
Injection signal
FAIL-SAFE MODE
When camshaft position signal has
failed during running, the ECM
determines the cylinder positions as
# to be the same as before occur-
rence of such a failure.
Intake air pressure is fixed to 760
mmHg.
The throttle opening is fixed to half
open position.
Ignition timing is also fixed.
Engine coolant temperature value is
fixed to 80 °C.
Cooling fan is fixed on position.
Intake air temperature value is fixed
to 40 °C.
Atmospheric pressure is fixed to 760
mmHg.
#1 Ignition-off
#2 Ignition-off
#3 Ignition-off
#4 Ignition-off
#1 Fuel-cut
#2 Fuel-cut
#3 Fuel-cut
#4 Fuel-cut
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.
RUNNING
ABILITY
"YES"
"YES"
"YES"
"YES"
"YES"
"YES"
"YES"
"YES"
"YES"
"YES"
"YES"
"YES"
"YES"
"YES"