Suzuki TU250X Service Manual page 148

DETECTED
DTC No.
ITEM
TO sensor
23
H
P1651
L
Ignition
signal
24
P0351
STV actuator When no actuator control signal is
28
P1655
STP sensor
29
H
P1654
L
Fuel injector
32
P0201
41 Fuel pump
H
P0230
L
42 Ignition
P1650 switch
DETECTED FAILURE CONDITION
The sensor voltage should be the fol-
lowing.
0.2 V sensor voltage < 4.6 V
In other than the above value, 23
(P1651) is indicated.
Sensor voltage is higher than specified
value.
Sensor voltage is lower than specified
value.
Signal from ignition coil is interrupted 8
times or more continuously although
ignition signal is supplied from the
ECM. In this case, the code 24
(P0351) is indicated.
supplied from the ECM, communica-
tion 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.
0.35 V sensor voltage < 4.9 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.
Fuel injector signal is interrupted 4
times or more continuously although
ignition signal is supplied from the
ECM. In this case, the code 32
(P0201) is indicated.
No voltage is applied to fuel pump.
Voltage is applied to fuel pump
although FP circuit is shut.
No voltage is applied to fuel pump
although FP circuit is normal.
Ignition switch signal is not input to the
ECM.
FI SYSTEM DIAGNOSIS 4-27
CHECK FOR
TO sensor, lead wire/coupler
connection
TO sensor circuit shorted to
VCC or ground circuit open
TO sensor circuit open or
shorted to ground or VCC circuit
open
Ignition coil, wiring/coupler con-
nection, power supply from the
battery
STVA motor, STVA lead
wire/coupler connection
STP sensor, lead wire/coupler
connection
STP sensor circuit shorted to
VCC or ground circuit open
STP sensor circuit open or
shorted to ground or VCC circuit
open
Fuel injector, wiring/coupler con-
nection, power supply to the
injector
FP, lead wire/coupler connection
FP circuit shorted to power
source
FP circuit open
Ignition switch, lead wire/coupler,
etc.