Suzuki Boulevard M50, Service Manual

Page: 185 / 454

5-28 FI SYSTEM
DTC No.
DETECTED
ITEM
DETECTED FAILURE CONDITION CHECK FOR
C21
IAT sensor The sensor voltage should be the fol-
lowing.
0.1 V sensor voltage < 4.6 V
In other than the above range, C21
(P0110) is indicated.
IAT sensor, lead wire/coupler
connection
P0110
H
Sensor voltage is higher than specified
value. IAT sensor circuit open or
ground circuit open
L
Sensor voltage is lower than specified
value. IAT sensor circuit shorted to
ground
C23
TO sensor 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 4.6 V
In other than the above value, C23
(P1651) is indicated.
TO sensor, lead wire/coupler
connection
P1651
H
Sensor voltage is higher than specified
value. TO sensor circuit open or
shorted to VCC or ground circuit
open
L
Sensor voltage is lower than specified
value. TO sensor circuit shorted to
ground or VCC circuit open
C24/C25
Ignition sig-
nal 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. Ignition coil, lead wire/coupler
connection, power supply from
the battery
P0351/P0352
C28
Secondary
throttle valve
actuator When no actuator control signal is
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. STVA motor, STVA lead wire/
coupler
P1655
C29
STP sensor The sensor should produce following
voltage.
0.1 V sensor voltage < 4.8 V
In other than the above range, C29 is
indicated.
STP sensor, lead wire/coupler
connection
P1654
H
Sensor voltage is higher than specified
value. STP sensor circuit shorted to
VCC or ground circuit open
L
Sensor voltage is lower than specified
value. STP sensor circuit open or
shorted to ground or VCC circuit
open
SA
MP
LE