Suzuki Boulevard M50, Service Manual

Page: 175 / 454

5-18 FI SYSTEM
In the LCD (DISPLAY) panel, the malfunction code is indicated from small code to large code.
*1
To get the proper signal from the throttle position sensor, the sensor basic position is indicated in the LCD
(DISPLAY) panel. The malfunction code is indicated in three digits. In front of the three digits, a line appears
in any of the three positions, upper, middle or lower line. If the indication is upper or lower line when engine
rpm is 1 100 r/min, slightly turn the throttle position sensor and bring the line to the middle.
In the normal condition, the throttle valve stop screw pushes throttle valves slightly, and middle line will be
indicated.
*2
When the secondary throttle valve actuator and secondary throttle position sensor signals are not sent to
ECM. In this case, C28 and C29 are indicated alternately.
CODE MALFUNCTION PART REMARKS
C00
C12
C13
C14
C15
C17
C21
C23
C24
C25
C28
C29
C31
C32
C33
C41
C42
C44
C49
None
Crankshaft position sensor (CKPS)
Intake air pressure sensor #2 (IAPS #2)
Throttle position sensor (TPS)
Engine coolant temp. sensor (ECTS)
Intake air pressure sensor #1 (IAPS #1)
Intake air temp. sensor (IATS)
Tip-over sensor (TOS)
Ignition signal #1 (IG coil #1)
Ignition signal #2 (IG coil #2)
Secondary throttle valve actuator (STVA)
Secondary throttle valve position sensor
(STPS)
Gear position signal (GP switch)
Injector signal #1 (FI #1)
Injector signal #2 (FI #2)
Fuel pump control system (FP control system)
Ignition switch signal (IG switch signal)
Heated oxygen sensor (HO2S)
PAIR control solenoid valve (PAIR valve) No defective part
Pick-up coil signal, signal generator
For Front cylinder
*1
For Rear cylinder
For Rear cylinder
For Front cylinder
*2
For Rear cylinder
For Front cylinder
Fuel pump, fuel pump relay
Anti-theft
For E-02, 19, 24
SA
MP
LE