Suzuki GSX-R750 Service Manual page 188

4-32 FI SYSTEM DIAGNOSIS
DETECTED
DTC No.
HO2 sensor
C44 (For E-02,
19)
P0130
C44
P0135
Exhaust con-
trol valve
actuator
C46
H
P1657
L
P1658
C49 PAIR control
solenoid
P1656
valve
C60 Cooling fan
P0480 relay
DETECTED FAILURE CONDITION
ITEM
HO2 sensor output voltage is not input
to ECM during engine operation and
running condition.
(Sensor voltage < 0.55 V)
In other than the above value, 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.
EXCVA position sensor produces fol-
lowing voltage.
0.1 V sensor voltage < 4.9 V
In other than the above range, C46
(P1675) is indicated.
When no actuator control signal is
supplied from the ECM, communica-
tion signal does not reach ECM or
operation voltage does not reach
EXCVA motor, C46 (P1658) is indi-
cated. EXCVA can not operate.
EXCVA position sensor voltage is
higher than specified value.
EXCVA position sensor voltage is
lower than specified value.
When no actuator control signal is
supplied from the ECM, communica-
tion signal does not reach ECM or
operation voltage does not reach
EXCVA motor, C46 (P1658) is indi-
cated. EXCVA motor can not operate.
PAIR control solenoid valve voltage is
not input to ECM.
Cooling fan relay signal is not input to
ECM.
CHECK FOR
HO2 sensor circuit open or
shorted to ground
HO2 sensor lead wire/coupler
connection
Battery voltage supply to the
HO2 sensor
EXCVA, EXCVA lead wire/cou-
pler
EXCVA position sensor circuit
shorted to VCC or ground circuit
open
EXCVA position sensor circuit
open or shorted to ground or
VCC circuit open
EXCVA, EXCVA motor lead
wire/coupler
PAIR control solenoid valve, lead
wire/coupler
Cooling fan relay, lead wire/cou-
pler connection