Suzuki GSX-R750 Service Manual page 463

10-4 SERVICING INFORMATION
DETECTED
DTC No.
STP sensor
C29
H
P1654
L
Gear posi-
tion signal
C31
P0705
Primary fuel
C32/C33
injector
C34/C35
P0201/P0202
P0203/P0204
Secondary
C36/C37
fuel injector
C38/C39
P1764/P1765
P1766/P1767
Fuel pump
relay
C41
H
P0230
L
C42 Ignition
switch
P1650
* : Immobilizer system is equipped model only.
DETECTED FAILURE CONDITION
ITEM
The sensor should produce following
voltage.
0.15 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 pro-
duced, but fuel injector signal is inter-
rupted 4 times or more continuously. In
this case, the code C32 (P0201), C33
(P0202), C34 (P0203) or C35 (P0204)
is indicated.
Some failure exists in the fuel injector
signal in a high load, high revolution
condition.In this case, the code C36
(P1764), C37 (P1765), C38 (P1766) or
C39 (P1767) is indicated.
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.
Ignition switch signal is not input to the
ECM.
* When the ID agreement is not verified.
* ECM does not receive communication
signal from the immobilizer antenna.
CHECK FOR
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
GP switch, wiring/coupler con-
nection, gearshift cam, etc.
Primary fuel injector, wiring/cou-
pler connection, power supply to
the injector
Secondary fuel injector, wir-
ing/coupler connection, power
supply to the injector
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)
Ignition switch, lead wire/coupler,
etc.
* Immobilizer/anti-theft system