Suzuki GW250 Service Manual page 169

4-28 FI SYSTEM DIAGNOSIS
DETECTED
DTC No.
TO sensor
C23
H
P1651
L
Ignition
C24/C25
signal
P0351/P0352
Gear
position
C31
signal
P0705
Fuel injector
C32/C33
P0201/P0202
ISC valve
C40
P0505
FP relay
C41
H
P0230
L
ECM/PCM
C41
power input
P2505
signal
C42 Ignition
P1650 switch
DETECTED FAILURE CONDITION
ITEM
The sensor voltage should be the fol-
lowing for 2 sec. and more, after igni-
tion 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 pro-
duced, but signal from ignition coil is
interrupted 8 times or more continu-
ously. In this case, the code C24
(P0351) or C25 (P0352) is indicated.
Gear position signal voltage should be
higher than the following for 3 seconds
and more.
Gear position signal voltage
If lower than the above value, C31
(P0705) is indicated.
CKP sensor (pickup coil) signal is pro-
duced, but fuel injector signal is inter-
rupted 4 times or more continuously. In
this case, the code C32 (P0201) or
C33 (P0202) is indicated.
The circuit voltage of motor drive is
unusual.
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.
Ignition switch signal is not input to the
ECM.
CHECK FOR
TO sensor, lead wire/coupler
connection
TO sensor signal circuit shorted
to VCC or ground circuit open
TO sensor signal circuit open or
shorted to ground or VCC circuit
open
Ignition coil, wiring/coupler con-
nection, power supply from the
battery
GP switch, wiring/coupler con-
nection, gearshift cam, etc.
0.6 V
Fuel injector, wiring/coupler con-
nection, power supply to the
injector
ISC valve circuit open or shorted
to ground
Fuel pump relay, lead wire/cou-
pler connection, power source to
fuel pump relay and fuel injec-
tors
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
Ignition switch, lead wire/coupler,
etc.