Suzuki GSF1250 Service Manual

Table of Contents 1- i
1
Section 1
CONTENTS
Engine
Precautions .................................................1-1
Precautions............................................................. 1-1
Precautions for Engine.......................................... 1-1
Engine General Information and
Diagnosis ................................................. 1A-1
General Description .............................................1A-1
Injection Timing Description ................................ 1A-1
Self-Diagnosis Function ...................................... 1A-2
Schematic and Routing Diagram........................1A-4
FI System Wiring Diagram .................................. 1A-4
Terminal Alignment of ECM Coupler................... 1A-5
Component Location ...........................................1A-6
FI System Parts Location.................................... 1A-6
Diagnostic Information and Procedures............1A-7
Engine Symptom Diagnosis ................................ 1A-7
Self-Diagnostic Procedures ..............................1A-11
Use of SDS Diagnosis Reset Procedures......... 1A-13
Show Data When Trouble (Displaying Data at
the Time of DTC) ............................................1A-14
SDS Check ....................................................... 1A-15
DTC Table......................................................... 1A-18
Fail-Safe Function Table................................... 1A-20
FI System Troubleshooting ...............................1A-21
Malfunction Code and Defective Condition
Table ...............................................................1A-22
DTC “C12” (P0335): CKP Sensor Circuit
Malfunction......................................................1A-25
DTC “C13” (P0105-H/L): IAP Sensor (No.1)
Circuit Malfunction .......................................... 1A-28
DTC “C14” (P0120-H/L): TP Sensor Circuit
Malfunction......................................................1A-37
DTC “C15” (P0115-H/L): ECT Sensor Circuit
Malfunction......................................................1A-45
DTC “C17” (P1750-H/L): IAP Sensor (No.2)
Circuit Malfunction .......................................... 1A-52
DTC “C21” (P0110-H/L): IAT Sensor Circuit
Malfunction......................................................1A-60
DTC “C23” (P1651-H/L): TO Sensor Circuit
Malfunction......................................................1A-67
DTC “C24” (P0351), “C25” (P0352), “C26”
(P0353) or “C27” (P0354): Ignition System
Malfunction......................................................1A-73
DTC “C28” (P1655): Secondary Throttle
Valve Actuator (STVA) Malfunction.................1A-73
DTC “C29” (P1654-H/L): Secondary Throttle
Position Sensor (STPS) Circuit Malfunction....1A-77
DTC “C31” (P0705): GP Switch Circuit
Malfunction......................................................1A-85
DTC “C32” (P0201), “C33” (P0202), “C34”
(P0203) or “C35” (P0204): Fuel Injector
Circuit Malfunction...........................................1A-87
DTC “C40” (P0505 / P0506 / P0507): ISC
Valve Circuit Malfunction.................................1A-91
DTC “C41” (P0230-H/L): FP Relay Circuit
Malfunction......................................................1A-97
DTC “C41” (P2505): ECM Power Input Signal
Malfunction....................................................1A-100
DTC “C42” (P1650): IG Switch Circuit
Malfunction....................................................1A-102
DTC “C44” (P0130/P0135): HO2 Sensor
(HO2S) Circuit Malfunction ...........................1A-102
DTC “C49” (P1656): PAIR Control Solenoid
Valve Circuit Malfunction...............................1A-108
DTC “C60” (P0480): Cooling Fan Relay
Circuit Malfunction.........................................1A-111
Specifications...................................................1A-114
Service Data....................................................1A-114
Special Tools and Equipment .........................1A-115
Special Tool ....................................................1A-115
Emission Control Devices ...................... 1B-1
Precautions...........................................................1B-1
Precautions for Emission Control Devices ..........1B-1
General Description .............................................1B-1
Fuel Injection System Description.......................1B-1
Crankcase Emission Control System
Description ........................................................1B-2
Exhaust Emission Control System
Description ........................................................1B-3
Noise Emission Control System Description.......1B-3
Schematic and Routing Diagram........................1B-4
PAIR System Hose Routing Diagram .................1B-4
Repair Instructions ..............................................1B-5
Heated Oxygen Sensor (HO2S) Removal and
Installation .........................................................1B-5
Heated Oxygen Sensor (HO2S) Inspection ........1B-5
PAIR Reed Valve Removal and Installation........1B-6

Suzuki GSF1250 Specifications

General

Displacement	1255 cc
Bore x Stroke	79.0 mm x 64.0 mm
Compression Ratio	10.5:1
Fuel System	Fuel injection
Transmission	6-speed, constant mesh
Front Suspension	Telescopic, coil spring, oil damped
Rear Suspension	Link type, coil spring, oil damped
Front Brakes	Dual hydraulic disc
Rear Brakes	Single hydraulic disc
Front Tire	120/70ZR17M/C (58W), tubeless
Rear Tire	180/55ZR17M/C (73W), tubeless
Overall Length	2130 mm
Overall Width	790 mm
Seat Height	805 mm
Wheelbase	1485 mm
Fuel Tank Capacity	19.0 L
Starter	Electric
Final Drive	Chain
Ignition	Electronic ignition (transistorized)
Engine Type	4-stroke, liquid-cooled, DOHC
Ground Clearance	135 mm