Suzuki GSF650A Service Manual page 100

1A-25 Engine General Information and Diagnosis:
Malfunction
Detected Item
Code
C15
ECT sensor
H
P0115
L
C21
IAT sensor
H
P0110
L
C23
TO sensor
H
P1651
L
C24/C25
C26/C27
Ignition signal
P0351/P0352
P0353/P0354
C28
Secondary throttle
P1655 valve actuator
C29
STP sensor
H
P1654
L
C31
Gear position signal
P0705
C32/C33
C34/C35
Fuel injector
P0201/P0202
P0203/P0204
Detected Failure Condition
The sensor voltage should be the following.
0.15 V ≤ sensor voltage < 4.85 V
In other than the above range, C15 (P0115) is
indicated.
Sensor voltage is higher than specified value.
Sensor voltage is lower than specified value.
The sensor voltage should be the following.
0.15 V ≤ sensor voltage < 4.85 V
In other than the above range, C21 (P0110) is
indicated.
Sensor voltage is higher than specified value.
Sensor voltage is lower than specified value.
The sensor voltage should be the following for
2 sec. and more, after ignition switch is turned
ON.
0.2 V ≤ sensor voltage < 4.8 V
In other than the above value, C23 (P1651) is
indicated.
Sensor voltage is higher than specified value.
Sensor voltage is lower than specified value.
CKP sensor (pick-up coil) signal is produced,
but signal from ignition coil is interrupted 8
times or more continuously. In this case, the
code C24 (P0351), C25 (P0352), C26 (P0353)
or C27 (P0354) is indicated.
When no actuator control signal is supplied
from the ECM, communication signal does not
reach ECM or operation voltage does not
reach STVA motor, C28 (P1655) is indicated.
STVA can not operate.
The sensor should produce following voltage.
0.2 V ≤ sensor voltage < 4.85 V
In other than the above range, C29 (P1654) is
indicated.
Sensor voltage is higher than specified value.
Sensor voltage is lower than specified value.
Gear position signal voltage should be higher
than the following for 3 seconds and more.
Gear position sensor voltage > 0.6 V
If lower than the above value, C31 (P0705) is
indicated.
CKP sensor (pickup coil) signal is produced,
but fuel injector signal is interrupted 4 times or
more continuously. In this case, the code C32
(P0201), C33 (P0202), C34 (P0203) or C35
(P0204) is indicated.
Check For
ECT sensor, lead wire/coupler
connection
ECT sensor circuit open or
ground circuit open
ECT sensor circuit shorted to
the ground
IAT sensor, lead wire/coupler
connection
IAT sensor circuit open or
ground circuit open
IAT sensor circuit shorted to
the ground
TO sensor, lead wire/coupler
connection
TO sensor circuit shorted to
Vcc or ground circuit open
TO sensor circuit open or
shorted to the ground or Vcc
circuit open
Ignition coil, wiring/coupler
connection, power supply from
the battery
STVA motor, STVA lead wire/
coupler
STP sensor, lead wire/coupler
connection
STP sensor circuit shorted to
Vcc or ground circuit open
STP sensor circuit open or
shorted to the ground or Vcc
circuit open
GP switch, wiring/coupler
connection, gearshift cam, etc.
Fuel injector, wiring/coupler
connection, power supply to
the injector.