Suzuki GSF650A Service Manual page 101

Malfunction
Detected Item
Code
C40/P0505
C40/P0506
ISC valve
C40/P0507
C41
Fuel pump relay
H
P0230
L
ECM power input
C41/P2505
signal
C42
Ignition switch
P1650
C44
P0130
HO2 sensor (HO2S)
C44
P0135
C49 PAIR control solenoid
P1656 valve
C60
Cooling fan relay
P0480
Engine General Information and Diagnosis:
Detected Failure Condition
The circuit voltage of motor drive is unusual.
Idle speed is lower than the desired idle
speed.
Idle speed is higher than the desired idle
speed.
No voltage is applied to the fuel pump,
although fuel pump relay is turned ON, or
voltage is applied to fuel pump although fuel
pump relay is turned OFF.
Voltage is applied to fuel pump although fuel
pump relay is turned OFF.
No voltage is applied to the fuel pump,
although fuel pump relay is turned ON.
No voltage is applied to the ECM, although FP
relay is turned ON.
Ignition switch signal is not input to the ECM.
HO2 sensor output voltage is not input to ECM
during engine operation and running
condition.
(Sensor voltage > 1.0 V)
C44 (P0130) is indicated.
The Heater can not operate so that heater
operation voltage is not supply to the oxygen
heater circuit, C44 (P0135) is indicated.
PAIR control solenoid valve voltage is not
input to ECM.
Cooling fan relay signal is not input to ECM.
Check For
ISC valve circuit open or
shorted to the ground
Air passage clogged
ISC valve fixed
ISC valve pre-set position is
incorrect
ISC valve hose connection
ISC valve is fixed
ISC valve pre-set position is
incorrect
Fuel pump relay, lead wire/
coupler connection, power
source to fuel pump relay and
fuel injectors
Fuel pump relay switch circuit
shorted to power source
Fuel pump relay (switch side)
Fuel pump relay circuit open or
short
Fuel pump relay (coil side)
Lead wire/coupler connection
of ECM terminal to fuel fuse,
Fuel fuse, Power source of
speedometer shorted to
ground.
Ignition switch, lead wire/
coupler, etc.
HO2S sensor circuit open or
shorted to the power source,
HO2 sensor lead wire/coupler
connection.
Heated circuit open or shorted
to the ground
Battery voltage supply to the
HO2 sensor
PAIR control solenoid valve,
lead wire/coupler
Cooling fan relay, lead wire/
coupler connection
1A-26