GV 650 GT 650 FI service

Transcription

1 GV 650 GT 650 FI service Kun indsprøjtningssystem 2008 Servicemanual Holtvej 8-10, Høruphav 6470 Sydals Telefon: Fax: CVR:

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3 FOREWORD GROUP INDEX This manual contains an introductory description on HYOSUNG & and procedures for its inspection / service and overhaul of its main components. It covers the differences from Carbure type and please refer to the service manual of ( ), & ( ) and ( ) for others which are not covered in this manual. Other information considered as generally known is not included. Read GENERAL INFORMATION section to familiarize yourself with outline of the vehicle and MAINTENANCE and other sections to use as a guide for proper inspection and service. This manual will help you know the vehicle better so that you can assure your customers of your optimum and quick service. GENERAL INFORMATION 1 FI SYSTEM DIAGNOSIS FUEL SYSTEM AND THROTTLE BODY 4-2 ELECTRICAL SYSTEM SERVICING INFORMATION 8 This manual has been prepared on the basis of the latest specification at the time of publication. If modification has been made since then, difference may exist between the content of this manual and the actual vehicle. Illustrations in this manual are used to show the basic principles of operation and work procedures. They may not represent the actual vehicle exactly in detail. WARNING This manual is intended for those who have enough knowledge and skills for servicing HYOSUNG vehicles. Without such knowledge and skills, you should not attempt servicing by relying on this manual only. Instead, please contact your nearby authorized HYOSUNG motorcycle dealer. COPYRIGHT S&T Motors Co., Ltd.

4 HOW TO USE THIS MANUAL TO LOCATE WHAT YOU ARE LOOKING FOR: 1. The text of this manual is divided into sections. 2. As the title of these sections are listed on the previous page as GROUP INDEX, select the section where you are looking for. 3. Holding the manual as shown at the right will allow you to find the first page of the section easily. 4. On the first page of each section, its contents are listed. Find the item and page you need. SYMBOL Listed in the table below are the symbols indicating instructions and other information necessary for servicing and meaning associated with them respectively. SYMBOL DEFINITION SYMBOL DEFINITION Torque control required. Data beside it indicates specified torque. Apply THREAD LOCK Apply oil. Use engine oil unless otherwise specified. Apply or use brake fluid. Apply SUPER GREASE A. Measure in voltage range. Apply SUPER GREASE C. Measure in resistance range. Apply SILICONE GREASE. Measure in current range. Apply MOLY PASTE. Measure in continuity test range. Apply BOND Use special tool. Use fork oil. Use engine coolant. 2

5 ABBREVIATIONS USED IN THIS MANUAL A L ABDC : After Bottom Dead Center LCD : Liquid Crystal Display AC : Alternating Current LED : Light Emitting Diode API : American Petroleum Institute LH : Left Hand ATDC : After Top Dead Center B BBDC BDC : Before Bottom Dead Center : Bettom Dead Center M Max Min : Maximum : Minimum BTDC : Before Top Dead Center O D O2 Sensor : Oxygen Sensor (O2S) DC DOHC : Direct Current : Double Over Head Camshaft R RH : Right Hand E S ECU : Engine Control Unit, FI Control Unit SAE SAV Solenoid : Society of Automotive Engineers : Secondary Air Valve Solenoid F T FI : Fuel Injection, Fuel Injector TDC : Top Dead Center FP : Fuel Pump TO Sensor : Tip Over Sensor (TOS) TP Sensor : Throttle Position Sensor (TPS) G GP Switch : Gear Position Switch W WT Sensor : Water Temperature Sensor I (WTS) IAP Sensor : Intake Air Pressure Sensor (IAPS) IAT Sensor : Intake Air Temperature Sensor (IATS) IG : Ignition ISC Solenoid : Idle Speed Control Solenoid 3

6 WIRE COLOR B : Black Gr : Gray Sb : Light blue L : Blue Lg : Light green W : White Br : Brown O : Orange Y : Yellow G : Green R : Red BL : Black with Blue tracer BBr : Black with Brown tracer BG : Black with Green tracer BO : Black with Orange tracer BR : Black with Red tracer BW : Black with White tracer BY : Black with Yellow tracer LB : Blue with Black tracer LG : Blue with Green tracer LR : Blue with Red tracer LW : Blue with White tracer LY : Blue with Yellow tracer BrB : Brown with Black tracer BrW : Brown with White tracer GB : Green with Black tracer GR : Green with Red tracer GY : Green with Yellow tracer GrB : Gray with Black tracer GrR : Gray with Red tracer GrW : Gray with White tracer OB : Orange with Black tracer OL : Orange with Blue tracer OG : Orange with Green tracer OR : Orange with Red tracer OW : Orange with White tracer OY : Orange with Yellow tracer RB : Red with Black tracer RW : Red with White tracer WB : White with Black tracer WL : White with Blue tracer WR : White with Red tracer YB : Yellow with Black tracer YL : Yellow with Blue tracer YG : Yellow with Green tracer YR : Yellow with Red tracer 4

7 GENERAL INFORMATION CONTENTS 1 SPECIFICATIONS( & ) 6 (1-8-1) SPECIFICATIONS( & ) 8 (1-9-1) 5

8 1-8-1 GENERAL INFORMATION SPECIFICATIONS ( & ) DIMENSIONS AND MASS ITEM Overall length Overall width Overall height Wheelbase Ground clearance Mass 2,430 mm (95.7 in) 840 mm (33.1 in) 1,155 mm (45.5 in) 1,665 mm (65.6 in) 160 mm (6.3 in) 220 kg (485 lbs) 2,060 mm (81.1 in) 740 mm (29.1 in) 1,090 mm (42.9 in) 1,435 mm (56.5 in) 150 mm (5.9 in) 205 kg (451 lbs) ENGINE ITEM Type Number of cylinder Bore Stroke Piston displacement Fuel system Starter system Lubrication system Four-stroke, DOHC, Liquid-cooled V-2 cylinder 81.5 mm (3.21 in) 62.0 mm (2.44 in) 647 cm3 (39.5 in 3 ) Fuel Injection Electric starter Wet sump TRANSMISSION ITEM Clutch Transmission Gearshift pattern Final reduction Gear ratio, 1st 2nd 3rd 4th 5th 6th Drive belt / chain Wet multi-plate type 5-speed constant mesh 1-down, 4-up Poly chain belt 6-speed constant mesh 1-down, 5-up RK525XSO 108 links 6

9 GENERAL INFORMATION CHASSIS ITEM Front suspension Rear suspension Steering angle Caster Trail Front brake Rear brake Front tire size Rear tire size Front fork stroke Telescopic type Swingarm type 35 (right & left) mm (6.3 in) Double disk brake Disk brake 120/70 - ZR 18 59W 180/55 - ZR 17 73W 130 mm (5.12 in) 30 (right & left) mm (3.35 in) 120/60 - ZR 17 55W 160/60 - ZR 17 69W 120 mm (4.72 in) ELECTRICAL ITEM Ignition type Ignition timing Spark plug Battery Main Fuse Head lamp HI Head lamp LO Turn signal lamp Brake / Tail lamp Illumination lamp License plate lamp High beam indicator lamp Turn signal indicator lamp(right & left) Neutral indicator lamp Fuel indicator lamp Coolant temperature indicator lamp FI (Fuel Injection) check lamp ECU 5 B.T.D.C.at 1,500 rpm CR8E 12 V 12 Ah (MF) 30 A 15 A 12 V - 60 W 1 12 V - 55 W 1 12 V - 10 W 4 LED type - 12 V - 5 W 1 LED type LED type LED type LED type (Level type) LED type (Level type) LED type 12 V - 60 W 1 12 V - 55 W 1 12 V - 10 W 4 12 V - 21 / 5 W 1 LED type 12 V - 5 W 1 LED type LED type LED type LED type (Level type) LED type (Level type) LED type CAPACITIES ITEM Fuel tank Engine oil, oil change with filter change overhaul Front fork oil capacity(one side) 16.0 l 3,000 ml 3,200 ml 3,400 ml 420 cc 17.0 l 380 cc NOTE The specifications are subject to change without notice. 7

10 1-9-1 GENERAL INFORMATION SPECIFICATIONS ( & ) DIMENSIONS AND MASS ITEM Overall length Overall width Overall height Wheelbase Ground clearance Mass (Standard type) 2,060 mm (81.1 in) 740 mm (29.1 in) 1,125 mm (44.3 in) 1,435 mm (56.5 in) 150 mm (5.9 in) 215 kg (474 lbs) (Sport type) 655 mm (25.8 in) 130 mm (5.1 in) 220 kg (485 lbs) ENGINE ITEM (Standard type) (Sport type) Type Number of cylinder Bore Stroke Piston displacement Fuel system Starter system Lubrication system Four-stroke, DOHC, Liquid-cooled V-2 cylinder 81.5 mm (3.21 in) 62.0 mm (2.44 in) 647 cm3 (39.5 in 3 ) Fuel Injection Electric starter Wet sump TRANSMISSION ITEM (Standard type) (Sport type) Clutch Transmission Gearshift pattern Final reduction Gear ratio, 1st 2nd 3rd 4th 5th 6th Drive chain Wet multi-plate type 6-speed constant mesh 1-down, 5-up RK525XSO 108 links 8

11 GENERAL INFORMATION CHASSIS ITEM (Standard type) (Sport type) Front suspension Rear suspension Steering angle Caster Trail Front brake Rear brake Front tire size Rear tire size Front fork stroke Telescopic type Swingarm type 27 (right & left) mm (2.91 in) Double disk brake Disk brake 120/60 - ZR 17 55W 160/60 - ZR 17 69W 120 mm (4.72 in) ELECTRICAL ITEM (Standard type) (Sport type) Ignition type Ignition timing Spark plug Battery Main Fuse Head lamp HI Head lamp LO Turn signal lamp Brake / Tail lamp Illumination lamp License plate lamp High beam indicator lamp Turn signal indicator lamp(right & left) Neutral indicator lamp Fuel indicator lamp Coolant temperature indicator lamp FI (Fuel Injection) check lamp ECU 5 B.T.D.C.at 1,500 rpm CR8E 12 V 12 Ah (MF) 30 A 15 A 12 V - H1 : 55 W 1 12 V - H3 : 55 W 1 12 V - 10 W 4 12 V - 21/5 W 1 LED type 12 V - 5 W 1 LED type LED type LED type LED type (Level type) LED type (Level type) LED type CAPACITIES ITEM (Standard type) (Sport type) Fuel tank Engine oil, oil change with filter change overhaul Front fork oil capacity(one side) 17.0 l 3,000 ml 3,200 ml 3,400 ml 380 cc NOTE The specifications are subject to change without notice. 9

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13 FI SYSTEM DIAGNOSIS CONTENTS PRECAUTIONS IN SERVICING 12 (4-1-1) FI SYSTEM TECHNICAL FEATURES 16 (4-1-5) SELF-DIAGNOSIS FUNCTION 22 (4-1-11) FI SYSTEM TROUBLESHOOTING 25 (4-1-14) CUSTOMER COMPLAINT ANALYSIS 25 (4-1-14) SELF-DIAGNOSTIC PROCEDURES 27 (4-1-16) SELF-DIAGNOSIS RESET PROCEDURE 27 (4-1-16) MALFUNCTION CODE AND DEFECTIVE CONDITION 28 (4-1-17) C12 PICK-UP COIL CIRCUIT MALFUNCTION 30 (4-1-19) C14 TP SENSOR CIRCUIT MALFUNCTION 31 (4-1-20) C15 WT SENSOR CIRCUIT MALFUNCTION 34 (4-1-23) C17 or C18 IAP SENSOR CIRCUIT MALFUNCTION 36 (4-1-25) C21 IAT SENSOR CIRCUIT MALFUNCTION 38 (4-1-27) C22 OXYGEN SENSOR CIRCUIT MALFUNCTION 40 (4-1-29) C23 TO SENSOR CIRCUIT MALFUNCTION 41 (4-1-30) C24 or C25 IGNITION COIL MALFUNCTION 42 (4-1-31) C31 GP SWITCH CIRCUIT MALFUNCTION 43 (4-1-32) C32 or C33 FUEL INJECTOR CIRCUIT MALFUNCTION 44 (4-1-33) C41 FUEL PUMP RELAY CIRCUIT MALFUNCTION 46 (4-1-35) SENSORS 47 (4-1-36)

14 4-1-1 FI SYSTEM DIAGNOSIS PRECAUTIONS IN SERVICING When handling the component parts or servicing the FI system, observe the following points for the safety of the system. ELECTRICAL PARTS CONNECTOR / COUPLER When connecting a connector, be sure to push it in until a click is felt. With a lock type coupler, be sure to release the lock when disconnecting, and push it in fully till the works when connecting it. When disconnecting the coupler, be sure to hold the coupler body and do not pull the lead wires. Inspect each terminal on the connector / coupler for looseness or bending. Inspect each terminal for corrosion and contamination. The terminals must be clean and free of any foreign material which could impede proper terminal contact. Inspect each lead wire circuit for poor connection by shaking it by hand lightly. If any abnormal condition is found, repair or replace. When taking measurements at electrical connectors using a tester probe, be sure to insert the probe from the wire harness side (backside) of the connector / coupler. 12

15 FI SYSTEM DIAGNOSIS When connecting meter probe from the terminal side of the coupler (connection from harness side not being possible), use extra care not to force and cause the male terminal to bend or the female terminal to open. Connect the probe as shown to avoid opening of female terminal. Never push in the probe where male terminal is supposed to fit. Check the male connector for bend and female connector for excessive opening. Also check the coupler for locking (looseness), corrosion, dust, etc. FUSE When a fuse blows, always investigate the cause to correct it and then replace the fuse. Do not use a fuse of a different capacity. Do not use wire or any other substitute for the fuse. ECU / VARIOUS SENSORS Since each component is a high-precision part, great care should be taken not to apply any sharp impacts during removal and installation. Be careful not to touch the electrical terminals of the ECU. The static electricity from your body may damage this part. 13

16 4-1-3 FI SYSTEM DIAGNOSIS When disconnecting and connecting the ECU, make sure to turn OFF the ignition switch, or electronic parts may get damaged. Battery connection in reverse polarity is strictly prohibited. Such a wrong connection will damage the components of the FI system instantly when reverse power is applied. INCORRECT Removing any battery terminal of a running engine is strictly prohibited. The moment such removal is made, damaging counter electromotive force will be applied to the ECU which may result in serious damage. Before measuring voltage at each terminal, check to make sure that battery voltage is 11V or higher. Terminal voltage check at low battery voltage will lead to erroneous diagnosis. 14

17 FI SYSTEM DIAGNOSIS Never connect an ohmmeter to the ECU with its coupler connected. If attempted, damage to ECU or sensors may result. Be sure to use a specified voltmeter / ohmmeter. Otherwise, accurate measurements may not be obtained and personal injury may result. USING TESTERS Use well-charged batteries in the tester. Be sure to set the tester to the correct testing range. USING THE TESTER Incorrectly connecting the and probes may cause the inside of the tester to burnout. If the voltage and current are not known, make measurements using the highest range. After using the tester, turn the power off. 15

18 4-1-5 FI SYSTEM DIAGNOSIS FI SYSTEM TECHNICAL FEATURES INJECTION TIME (INJECTION VOLUME) The factors to determine the injection time include the basic fuel injection time, which is calculated on the basis of intake air pressure, engine speed and throttle opening angle, and various compensations. These compensations are determined according to the signals from various sensors that detect the engine and driving conditions. ECU Intake Air Pressure Sensor (IAP Sensor) Pick-up coil Throttle Position Sensor (TP Sensor) Various Sensors Intake air pressure signal Engine speed signal Throttle opening signal Various signals Basic fuel injection time Compensation Injectors Injection signal Ultimate fuel injection time 16

19 FI SYSTEM DIAGNOSIS COMPENSATION OF INJECTION TIME (VOLUME) The following different signals are output from the respective sensors for compensation of the fuel injection time (volume). SIGNAL WATER COOLANT TEMPERATURE SENSOR SIGNAL INTAKE AIR TEMPERATURE SENSOR SIGNAL BATTERY VOLTAGE SIGNAL ENGINE RPM SIGNAL STARTING SIGNAL ACCELERATION SIGNAL / DECELERATION SIGNAL DESCRIPTION When engine coolant temperature is low, injection time (volume) is increased. When intake air temperature is low, injection time (volume) is increased. ECU operates on the battery voltage and at the same time, it monitors the voltage signal for compensation of the fuel injection time (volume). A longer injection time is needed to adjust injection volume in the case of low voltage. At high speed, the injection time (volume) is increased. When starting engine, additional fuel is injected during cranking engine. During acceleration, the fuel injection time (volume) is increased in accordance with the throttle opening speed and engine rpm. During deceleration, the fuel injection time (volume) is decreased. INJECTION STOP CONTROL SIGNAL TIP OVER SENSOR SIGNAL (FUEL CUT-OFF) OVER-REV. LIMITER SIGNAL DESCRIPTION When the motorcycle tips over, the tip over sensor sends a signal to the ECU. Then, this signal cuts OFF current supplied to the fuel pump, fuel injector and ignition coil. The fuel injectors stop operation when engine rpm reaches rev. limit rpm. 17

20 FISYSTEM DIAGNOSIS FI SYSTEM PARTS LOCATION ( ) ECU Speedometer Fuel pump relay Fuel injector, NO.1 TP sensor IAT sensor Fuel injector, NO.2 GP switch Pick-up coil Ignition coil, NO.1 18

21 FISYSTEM DIAGNOSIS ECU TO sensor Ignition coil, NO.2 IAP sensor, NO.2 IAP sensor, NO.1 WT sensor Oxygen sensor 19

22 FISYSTEM DIAGNOSIS FI SYSTEM PARTS LOCATION ( ) ECU 7 6 Speedometer Fuel injector, NO.1 TP sensor Fuel injector, NO.2 IAT sensor GP switch Pick-up coil Ignition coil, NO.1 20

23 FISYSTEM DIAGNOSIS ECU Fuel pump relay TO sensor Ignition coil, NO.2 IAP sensor, NO.1 IAP sensor, NO.2 WT sensor Oxygen sensor 21

24 FI SYSTEM DIAGNOSIS SELF-DIAGNOSIS FUNCTION The self-diagnosis function is incorporated in the ECU. The function has two modes, USER MODE and DEALER MODE. The user can only be notified by the LCD(DISPLAY) panel 1 and the FI check lamp 2. To check the function of the individual FI system devices, the dealer mode is prepared. In this check, the special tool is necessary to read the code of the malfunction items. USER MODE NO YES MALFUNCTION Engine can start Engine can not start LCD (DISPLAY) FI CHECK LAMP INDICATION INDICATION 1 INDICATION 2 MODE Speedometer - - Speedometer and FI letters *1 FI letters *2 FI check lamp comes on. FI check lamp comes on and blinks. Each 2 sec. Speedometer or FI is indicated. FI is indicated continuously. *1 When one of the signals is not received by ECU, the fail-safe circuit works and injection is not stopped. In this case, FI and speedometer are indicated in the LCD panel and motorcycle can run. *2 The injection signal is stopped, when the crankshaft position sensor signal, tip over sensor signal, #1/#2 ignition signals, #1/#2 injector signals, fuel pump relay signal or ignition switch signal is not sent to ECU. In this case, FI is indicated in the LCD panel. Motorcycle does not run. CHEC : The LCD panel indicates CHE when no communication signal from the ECU is received for 3 seconds. For example, The ignition switch is turned ON position, and the engine stop switch is turned OFF position. In this case, the speedometer does not receive any signal from ECU, and the panel indicates CHE. If CHE is indicated, the LCD does not indicate the trouble code. It is necessary to check the wiring harness between ECU and speedometer couplers. The possible cause of this indication is as follows, Engine stop switch is in OFF position. Ignition fuse is burnt. 2 22

25 FI SYSTEM DIAGNOSIS DEALER MODE The defective function is memorized in the ECU. Use the special tool s coupler to connect to the dealer mode coupler. (Refer to page ) The memorized malfunction code is displayed on LCD (DISPLAY) panel. Malfunction means that the ECU does not receive signal from the devices. These affected devices are indicated in the code form. Mode select switch : CAUTION Do not disconnect the ECU lead wire couplers, before checking the malfunction code, or the malfunction code memory is erased and the malfunction code can not be checked. Confirm the malfunction code after turn the ignition switch ON position or cranking the engine for few seconds. MALFUNCTION NO YES LCD (DISPLAY) FI CHECK LAMP INDICATION INDICATION INDICATION MODE C00 - C**code is indicated from small numeral to large one. FI check lamp goes off. For each 2 sec., code is indicated. 23

26 FI SYSTEM DIAGNOSIS CODE C00 None MALFUNCTION PART No defective part REMARKS C12 C14 C15 C17 C18 C21 C22 C23 C24 C25 C31 C32 C33 C41 Pick-up coil Throttle position sensor (TPS) Water temperature sensor (WTS) Intake air pressure sensor (IAPS), NO.1 Intake air pressure sensor (IAPS), NO.2 Intake air temperature sensor (IATS) Oxygen sensor (O2S) Tip over sensor (TOS) IG coil, NO.1 IG coil, NO.2 Gear position switch (GP switch) Fuel injector, NO.1 Fuel injector, NO.2 Fuel pump relay For NO.1 cylinder For NO.2 cylinder For NO.1 cylinder For NO.2 cylinder For NO.1 cylinder For NO.2 cylinder In the LCD (DISPLAY) panel, the malfunction code is indicated from small code to large code. 24

27 FI SYSTEM DIAGNOSIS FI SYSTEM TROUBLESHOOTING CUSTOMER COMPLAINT ANALYSIS Record details of the problem (failure, complaint) and how it occurred as described by the customer. For this purpose, use of such an inspection form will facilitate collecting information to the point required for proper analysis and diagnosis. EXAMPLE : CUSTOMER PROBLEM INSPECTION FORM User name : Model : VIN : Date of issue : Date Reg. Date of problem : Mileage : FI Check lamp Malfunction display / code (LCD) Always ON Sometimes ON Always OFF Good condition No code Malfunction code ( ) PROBLEM SYMPTOMS Difficult Starting Poor Driveability No cranking Hesitation on acceleration No initial combustion Back fire / After fire No combustion Lack of power Poor starting at Surging ( cold warm always) Abnormal knocking Other Engine rpm jumps briefly Other Poor Idling Engine Stall when Poor fast Idle Immediately after start Abnormal idling speed Throttle valve is opened ( High Low) ( rpm) Throttle valve is closed Unstable Load is applied Hunting ( rpm. to rpm) Other Other OTHERS : 25

28 FI SYSTEM DIAGNOSIS MOTORCYCLE / ENVIRONMENTAL CONDITION WHEN PROBLEM OCCURS Environmental condition Weather Fair Cloudy Rain Snow Always Other Temperature Hot Warm Cool Cold ( F / C) Always Frequency Always Sometimes ( times / day, month) Only once Under certain condition Road Urban Suburb Highway Mountainous ( Uphill Downhill) Tarmacadam Gravel Other Motorcycle condition Engine condition Cold Warming up phase Warmed up Always Other at starting Immediately after start Racing without load Engine speed ( rpm) Motorcycle condition During driving : Constant speed Accelerating Decelerating Right hand corner Left hand corner At stop Motorcycle speed when problem occurs ( km/h, Mile/h) Other NOTE The above form is a standard sample. If should be modified according to conditions characteristic of each market. 26

29 1 FI SYSTEM DIAGNOSIS SELF-DIAGNOSTIC PROCEDURES Don t disconnect couplers from ECU, battery cable from battery, ECU ground wire harness from engine or main fuse before confirming malfunction code (self-diagnostic trouble code) stored in memory. Such disconnection will erase memorized information in ECU memory. Malfunction code stored in ECU memory can be checked by the special tool. To check malfunction code, read SELF-DIAGNOSIS FUNCTION DEALER MODE (Refer to page , 13) carefully to have good understanding as to what functions are available and how to use it. Be sure to read PRECAUTIONS for Electrical Circuit Service (Refer to page 4-1-1) before inspection and observe what is written there. Remove the seat. Connect the special tool to the dealer mode coupler at the wiring harness, and the ignition switch is set to ON position. Turn the special tool s switch ON position and check the malfunction code to determine the malfunction part. Mode select switch : NOTE The dealer mode coupler is located under the seat. SELF-DIAGNOSIS RESET PROCEDURE After repairing the trouble, turn the ignition switch OFF position and turn ON position again. If C00(LCD INDICATION 1 ) is indicates, the malfunction codes are cleared. Disconnect the special tool from the dealer mode coupler. 1 27

30 FI SYSTEM DIAGNOSIS MALFUNCTION CODE AND DEFECTIVE CONDITION MALFUNCTION CODE DETECTED ITEM DETECTED FAILURE CONDITION CHECK FOR C00 NO FAULT - C12 C14 C15 C17 / C18 C21 C22 C23 Pick-up coil Throttle position sensor (TPS) Water temperature sensor (WTS) Intake air pressure sensor (IAPS), NO.1 / NO.2 Intake air temperature sensor (IATS) Oxygen sensor (O2S) Tip over sensor (TOS) The signal does not reach ECU for more than 2 sec. after receiving the IAP signal. Pick-up coil wiring and mechanical parts. (Pick-up coil, lead wire coupler connection) The sensor should produce following voltage. 0.2 V sensor voltage 4.8 V Without the above range for 5 sec. and more, C14 is indicated. Throttle position sensor, lead wire / coupler connection. The sensor voltage should be the following. 0.2 V sensor voltage 4.6 V Without the above range for 5 sec. and more, C15 is indicated. Water temperature sensor, lead wire / coupler connection. The sensor should produce following voltage. 0.2 V sensor voltage 4.8 V Without the above range for 5 sec. and more, C17 or C18 is indicated. Intake air pressure sensor, lead wire / coupler connection. The sensor voltage should be the following. 0.2 V sensor voltage 4.6 V Without the above range for 5 sec. and more, C21 is indicated. Intake air temperature sensor, lead wire / coupler connection. The oxygen sensor signal is input in ECU since then 180 sec. after the engine run. When this is the case, ECU not receive the signal, C22 is indicated. Oxygen sensor, lead wire / coupler connection. The sensor voltage should be the following for more than 5 sec. after ignition switch turns ON position. 0.2 V sensor voltage 4.6 V Without the above value for 5 sec. and more, C23 is indicated. Tip over sensor, lead wire / coupler connection. 28

31 FI SYSTEM DIAGNOSIS MALFUNCTION CODE C24 / C25 C31 C32 / C33 C41 DETECTED ITEM Ignition coil (IG coil), NO.1 / NO.2 Gear position switch (GP switch) Fuel injector, NO.1 / NO.2 Fuel pump relay DETECTED FAILURE CONDITION CHECK FOR Ignition signal is interrupted continuous by 32 times or more when ECU confirm ignition surge at each combustion chamber, C24 or C25 is indicated. Ignition coil, wiring / coupler connection, power supply from the battery. It judges from gear position voltage, engine speed and throttle position by ECU, when the gear position voltage is 0.1 V and less. Gear position switch, wiring / coupler connection, gearshift cam etc. Injector signal is interrupted continuous by 16 times or more when ECU confirm injector running surge at each combustion chamber, C32 or C33 is indicated. Injector, wiring / coupler connection, power supply to the injector. Voltage is applied continuous over 5 sec., battery voltage 5 V when fuel pump relay is OFF position or battery voltage 5 V when fuel pump relay is ON position. Fuel pump relay, connecting lead wire, power source to fuel pump relay, fuel injector. 29

32 FI SYSTEM DIAGNOSIS C12 PICK-UP COIL CIRCUIT MALFUNCTION DETECTED CONDITION The signal does not reach ECU for more than 2 sec. after receiving the IAP signal. POSSIBLE CAUSE Metal particles or foreign materiel being attached on the pick-up coil and rotor tip. Pick-up coil circuit open or short. Pick-up coil malfunction. ECU malfunction. INSPECTION Step 1 1) Remove the frame cover. 2) Turn the ignition switch OFF position. 3) Check the pick-up coil coupler 1 for loose or poor contacts. If OK, then measure the pick-up coil resistance. 1 4) Disconnect the pick-up coil coupler 1 and measure the resistance. Pick-up coil resistance 110 ~ 140 Ϊ (G - L) 5) If OK, then check the continuity between each terminal and ground. Pick-up coil continuity Ϊ (Infinity) (G- Ground) (L- Ground) Tester knob indication : Resistance (Ϊ ) Are the resistance and continuity OK? YES L or G wire open or shorted to ground, or poor 3 or 15 connection. If wire and connection are OK, intermittent trouble or faulty ECU. Recheck each terminal and wire harness for open circuit and poor connection. NO Loose or poor contacts on the pickup coil coupler or ECU coupler. Replace the pick-up coil with a new one. ECU Coupler 15 30

33 FI SYSTEM DIAGNOSIS C14 TP SENSOR CIRCUIT MALFUNCTION DETECTED CONDITION Output voltage is out of the specified range. 0.2 V Sensor voltage 4.8 V POSSIBLE CAUSE TP sensor circuit open or short. TP sensor malfunction. ECU malfunction. INSPECTION Step 1 1) Turn the ignition switch OFF position. 2) Check the TP sensor coupler for loose or poor contacts. If OK, then measure the TP sensor input voltage. 3) Disconnect the TP sensor coupler. 4) Turn the ignition switch ON position. 5) Measure the voltage at the OB wire and ground. 6) If OK, then measure the voltage at the OB wire and GR wire. TP sensor input voltage 4.5 ~ 5.5 V ( OB- Ground ) ( OB- GR ) Tester knob indication : Voltage ( ) Is the voltage OK? YES NO Go to Step 2. Loose or poor contacts on the ECU coupler. Open or short circuit in the OB wire or GR wire. 31

34 FI SYSTEM DIAGNOSIS Step 2 1) Remove the frame cover. 2) Turn the ignition switch OFF position. 3) Disconnect the TP sensor coupler. 4) Check the continuity between and ground. TP sensor continuity Ϊ (Infinity) ( - Ground) Ground 5) If OK, then measure the TP sensor resistance (between and ). 6) Turn the throttle grip and measure the resistance. TP sensor resistance Throttle valve is closed Approx kω Throttle valve is opened Approx kω Tester knob indication : Resistance ( kω ) Are the resistance and continuity OK? YES NO Go to Step 3. Reset the TP sensor position correctly. Replace the TP sensor with a new one. 32

35 5 FI SYSTEM DIAGNOSIS Step 3 1) Connect the TP sensor coupler. 2) Insert the needle pointed probes to the lead wire coupler. 3) Turn the ignition switch ON position. Measure the TP sensor output voltage at the coupler (between LY and GR) by turning the throttle grip. TP sensor output voltage Throttle valve is closed Approx V Throttle valve is opened Approx V Tester knob indication : Voltage ( ) Is the voltage OK? YES NO OB, LY or GR wire open or shorted to ground, or poor, 5, or 59 connection. If wire and connection are OK, intermittent trouble or faulty ECU. Recheck each terminal and wire harness for open circuit and poor connection. If check result is not satisfactory, replace TP sensor with a new one. 59 ECU Coupler 33

36 FI SYSTEM DIAGNOSIS C15 WT SENSOR CIRCUIT MALFUNCTION DETECTED CONDITION Output voltage is out of the specified range. 0.2 V Sensor voltage 4.6 V POSSIBLE CAUSE WT sensor circuit open or short. WT sensor malfunction. ECU malfunction. INSPECTION Step 1 1) Turn the ignition switch OFF position. 2) Check the WT sensor coupler for loose or poor contacts. If OK, then measure the WT sensor voltage at the wire side coupler. 3) Disconnect the coupler and turn the ignition switch ON position. 4) Measure the voltage between Br wire terminal and ground. 5) If OK, then measure the voltage between Br wire terminal and BW wire terminal. WT sensor voltage 4.5 ~ 5.5 V ( Br- Ground ) ( Br- BW ) Tester knob indication : Voltage ( ) Is the voltage OK? YES NO Go to Step 2. Loose or poor contacts on the ECU coupler. Open or short circuit in the Br wire or BW wire. 34

37 FI SYSTEM DIAGNOSIS Step 2 1) Turn the ignition switch OFF position. 2) Measure the WT sensor resistance. Refer to the service manual ( ) page 5-7 Refer to the service manual ( ) page 5-7 WT sensor resistance Engine Coolant Temp. Resistance (To ECU) 0 (32 ) Approx kω 20 (68 ) Approx kω 40 (104 ) Approx kω 60 (140 ) Approx kω 80 (176 ) Approx kω Tester knob indication : Resistance ( kω ) Is the resistance OK? YES Br or BW wire open or shorted to ground, or poor 13 or 59 connection. If wire and connection are OK, intermittent trouble or faulty ECU. Recheck each terminal and wire harness for open circuit and poor connection. 13 NO Replace the WT sensor with a new one. 59 ECU Coupler 35

38 FI SYSTEM DIAGNOSIS C17 or C18 IAP SENSOR CIRCUIT MALFUNCTION DETECTED CONDITION IAP sensor voltage is out of the specified range. 0.2 V Sensor voltage 4.8 V NOTE : Note that atmospheric pressure varies depending on weather conditions as well as altitude. Take that into consideration when inspecting voltage. POSSIBLE CAUSE Clogged vacuum passage between throttle body and IAP sensor. Air being drawn from vacuum passage between throttle body and IAP sensor. IAP sensor circuit open or shorted to ground. IAP sensor malfunction. ECU malfunction. INSPECTION Step 1 1) Remove the fuel tank. 2) Turn the ignition switch OFF position. 3) Check the IAP sensor NO.1 coupler 1 and NO.2 coupler 2 for loose or poor contacts. If OK, then measure the IAP sensor input voltage. 4) Disconnect the IAP sensor coupler NO.1 3 and NO ) Turn the ignition switch ON position. 6) Measure the voltage at the OB wire and ground. If OK, then measure the voltage at the OB wire and GR wire. IAP sensor input voltage 4.5 ~ 5.5 V ( OB - Ground ) ( OB - GR ) Tester knob indication : Voltage ( ) Is the voltage OK? 4 YES NO Go to Step 2. Loose or poor contacts on the ECU coupler. Open or short circuit in the OB wire or GR wire. 36

39 1 FI SYSTEM DIAGNOSIS Step 2 1) Connect the IAP sensor coupler NO.1 1 and NO ) Insert the needle pointed probes to the lead wire coupler. 3) Start the engine at idle speed. 4) Measure the IAP sensor output voltage at the wire side coupler (between BL and GR wires). IAP sensor output voltage Approx. 2.7 V at idle speed ( BL - GR ) Tester knob indication : Voltage ( ) 2 Is the voltage OK? OB, BL(NO.1), BY(NO.2) or GR wire open or shorted to ground, or poor, (NO.1), (NO.2) or 59 connection. YES If wire and connection are OK, intermittent trouble or faulty ECU. Recheck each terminal and wire harness for open circuit and poor connection. NO If check result is not satisfactory, replace IAP sensor with a new one. 59 ECU Coupler Output voltage (Input voltage 5 V, ambient temp. 25 C, 77 F) ALTITUDE (Reference) ATMOSPHERIC PRESSURE OUTPUT VOLTAGE (ft) (m) (mmhg) kpa (V) Approx. 3.7 ~ Approx. 3.3 ~ Approx. 3.0 ~ Approx. 2.7 ~

40 FI SYSTEM DIAGNOSIS C21 IAT SENSOR CIRCUIT MALFUNCTION DETECTED CONDITION Output voltage is out of the specified range. 0.2 V Sensor voltage 4.6 V POSSIBLE CAUSE IAT sensor circuit open or short. IAT sensor malfunction. ECU malfunction. INSPECTION Step 1 1) Remove the fuel tank. 2) Turn the ignition switch OFF position. 3) Check the IAT sensor coupler for loose or poor contacts. If OK, then measure the IAT sensor voltage at the wire side coupler. 4) Disconnect the coupler and turn the ignition switch ON position. 5) Measure the voltage between GW wire terminal and ground. 6) If OK, then measure the voltage between GW wire terminal and GR wire terminal. GR IAT sensor voltage 4.5 ~ 5.5 V ( GW - Ground ) ( GW - GR ) Tester knob indication : Voltage ( ) GW Is the voltage OK? YES NO Go to Step 2. Loose or poor contacts on the ECU coupler. Open or short circuit in the GW wire or GR wire. 38

41 11 FI SYSTEM DIAGNOSIS Step 2 1) Turn the ignition switch OFF position. 2) Measure the IAT sensor resistance. Intake Air Temp. 0 (32 ) 80 (176 ) IAT sensor resistance Resistance Approx. 5.4 ~ 6.6 kω Approx ~ 0.39 kω Tester knob indication : Resistance ( kω ) Is the resistance OK? YES GW or GR wire open or shorted to ground, or poor 11 or 59 connection. If wire and connection are OK, intermittent trouble or faulty ECU. Recheck each terminal and wire harness for open circuit and poor connection. NO Replace the IAT sensor with a new one. NOTE 59 ECU Coupler IAT sensor resistance measurement method is the same way as that of the WT sensor. Refer to the service manual ( ) page 5-7 Refer to the service manual ( ) page

42 FI SYSTEM DIAGNOSIS C22 OXYGEN SENSOR CIRCUIT MALFUNCTION DETECTED CONDITION Oxygen sensor signal is not input in ECU since then more than 180 sec. after the engine run. POSSIBLE CAUSE Oxygen sensor, Oxygen sensor heater circuit open or short. Oxygen sensor, Oxygen sensor heater malfunction. ECU malfunction. INSPECTION 1) Remove the seat. 2) Turn the ignition switch OFF position. 3) Check the Oxygen sensor coupler for loose or poor contacts. Is OK? YES B or GR wire open or shorted to ground, or poor 9 or 59 connection. (Sensor) OB or B wire open or shorted to ground, or poor or 44 connention. (Heater) If wire and connection are OK, intermittent trouble or faulty ECU. Recheck each terminal and wire harness for open circuit and poor connection ECU Coupler NO Replace the Oxygen sensor. 40

43 FI SYSTEM DIAGNOSIS C23 TO SENSOR CIRCUIT MALFUNCTION DETECTED CONDITION Output voltage is out of the specified range. 0.2 V Sensor voltage 4.6 V POSSIBLE CAUSE TO sensor circuit short or leaned more than 60. TO sensor malfunction. ECU malfunction. INSPECTION Step 1 1) Remove the seat. 2) Turn the ignition switch OFF position. 3) Check the TO sensor coupler for loose or poor contacts. If OK, then measure the TO sensor resistance. 4) Remove the TO sensor. 5) Measure the resistance between B wire and GR wire terminals. TO sensor resistance 19.1 ~ 19.7 kω (B - GR) Tester knob indication : Resistance ( kω ) Is the resistance OK? YES NO Go to step 2 Replace the TO sensor with a new one. 41

44 FI SYSTEM DIAGNOSIS Step 2 1) Connect the TO sensor coupler. 2) Insert the needle pointed probe to the lead wire coupler. 3) Turn the ignition switch ON position. 4) Measure the voltage at the wire side coupler between OB and GR wires of the TO sensor at horizontal. TO sensor voltage 0.4 ~ 1.4 V at normal condition ( OB - GR ) Also, measure the voltage when leaning of the motorcycle. 5) Measure the voltage when it is leaned more than 65, left and right, from the horizontal level. TO sensor voltage 3.7 ~ 4.4 V at leaned more than 65 ( OB - GR ) Tester knob indication : Voltage ( ) Is the voltage OK? YES NO OB, B or GR wire open or shorted to ground, or poor, 4 or 59 connection. If wire and connection are OK, intermittent trouble or faulty ECU. Recheck each terminal and wire harness for open circuit and poor connection. Loose or poor contacts on the ECU coupler. Open or short circuit in the OB wire or GR wire. Replace the TO sensor with a new one. 59 ECU Coupler C24 or C25 IGNITION COIL MALFUNCTION Refer to the IGNITION COIL for details. [Refer to the service manual ( ) page 6-5, Refer to the service manual ( ) page 6-5] 42

45 12 FI SYSTEM DIAGNOSIS C31 GP SWITCH CIRCUIT MALFUNCTION DETECTED CONDITION No Gear Position switch voltage Switch voltage is out of the specified range. Switch Voltage 0.1 V POSSIBLE CAUSE GP switch circuit open or short. GP switch malfunction. ECU malfunction. INSPECTION Step 1 1) Remove the frame cover. 2) Turn the ignition switch OFF position. 3) Check the GP switch coupler for loose or poor contacts. If OK, then measure the GP switch resistance. 4) Support the motorcycle with a jack. 5) Turn the side-stand to up-right position. 6) Make sure the engine stop switch is in the position. 7) Insert the needle pointed probes to the GP switch coupler. 8) Turn the ignition switch ON position. 9) Measure the resistance at the wire side coupler between GL wire and BW wire, when shifting the gearshift lever from 1st to Top. GP switch resistance 100 Ϊ ~ 2.0 kω (GL - BW) Tester knob indication : Resistance ( kω ) Is the resistance OK? YES GL wire open or shorted to ground, or poor 12 connection. If wire and connection are OK, intermittent trouble or faulty ECU. Recheck each terminal and wire harness for open circuit and poor connection. NO Open or short circuit in the GL wire. ECU Coupler 43

46 FISYSTEM DIAGNOSIS C32 or C33 FUEL INJECTOR CIRCUIT MALFUNCTION DETECTED CONDITION Injector signal is interrupted continuous by 16 times or more when ECU confirm injector running surge at each combustion chamber. POSSIBLE CAUSE Injector circuit open or short. Injector malfunction. ECU malfunction. INSPECTION Step 1 1) Remove the fuel tank and frame cover. 2) Turn the ignition switch OFF position. 3) Check the injector couplers NO.1 1 and NO.2 2 for loose or poor contacts. If OK, then measure the injector resistance. 1 4) Disconnect the injector couplers NO.1 1 and NO.2 2 and measure the resistance between terminals. Injector resistance 11.0 ~ 13.0 Ϊ at 20 (68 ) (1-2 ) 2 5) If OK, then check the continuity between injector terminals and ground. Injector continuity Ϊ (Infinity) (1 - Ground) Tester knob indication : Resistance ( Ϊ ) Are the resistance and continuity OK? YES NO Go to Step 2 Replace the Injector with a new one. 44

47 FISYSTEM DIAGNOSIS Step 2 1) Turn the ignition switch ON position. 2) Measure the injector voltage between YR(NO.1), RB(NO.2) wire and ground. Injector voltage Battery voltage ( YR[NO.1] - Ground ) ( RB[NO.2] - Ground ) Tester knob indication : Voltage ( ) NOTE Injector voltage can be detected only 3 seconds after ignition switch is turned ON position. Is the voltage OK? YES NO YR(NO.1), RB(NO.2) wire open or shorted to ground, or poor (NO.1), 36 (NO.2) connection. If wire and connection are OK, intermittent trouble or faulty ECU. Recheck each terminal and wire harness for open circuit and poor connection. Inspect the fuel pump or fuel pump relay. (Refer to page 4-2-5) 36 ECU Coupler 45

48 FISYSTEM DIAGNOSIS C41 FUEL PUMP RELAY CIRCUIT MALFUNCTION DETECTED CONDITION Voltage is applied continuous over 5 sec., battery voltage 5 V when fuel pump relay is OFF position or battery voltage 5 V when fuel pump relay is ON position. POSSIBLE CAUSE Fuel pump relay circuit open or short. Fuel pump relay malfunction. ECU malfunction. INSPECTION Step 1 1) Remove the frame cover. 2) Turn the ignition switch OFF position. 3) Check the fuel pump relay coupler for loose or poor contacts. If OK, then check the insulation and continuity. Refer to page for details. Is the Fuel pump relay OK? YES GW wire open or shorted to ground, or poor 58 connection. If wire and connection are OK, intermittent trouble or faulty ECU. Recheck each terminal and wire harness for open circuit and poor connection. Inspect the fuel injectors. (Refer to page ) NO Replace the fuel pump relay with a new one. 58 ECU Coupler 46

49 FISYSTEM DIAGNOSIS SENSORS PICK-UP COIL INSPECTION The pick-up coil 1 is installed in the magneto cover. PICK-UP COIL REMOVAL AND INSTALLATION Remove the magneto cover. Install the magneto cover in the reverse order of removal. IAP SENSOR INSPECTION The intake air pressure (IAP) sensor NO.1 2 and NO.2 3 is installed at the side of the air cleaner. (Refer to page ) IAP SENSOR REMOVAL AND INSTALLATION Remove the fuel tank. Remove the IAP sensor from the downside of air cleaner. Install the IAP sensor in the reverse order of removal. TP SENSOR INSPECTION The throttle position (TP) sensor 4 is installed at the left side of the throttle body. (Refer to page ) TP SENSOR REMOVAL AND INSTALLATION CAUTION Never remove the TP sensor. WT SENSOR INSPECTION The water temperature (WT) sensor 5 the rear side of the thermostat case. (Refer to page ) is installed at WT SENSOR REMOVAL AND INSTALLATION Remove the WT sensor. Install the WT sensor in the reverse order of removal. WT sensor : 18 N m (1.8 kgf m) 5 47

50 FISYSTEM DIAGNOSIS IAT SENSOR INSPECTION The intake air temperature (IAT) sensor 1 is installed at the downside of the air cleaner case. (Refer to page ) IAT SENSOR REMOVAL AND INSTALLATION Remove the fuel tank. Remove the IAT sensor from the air cleaner case. Install the IAT sensor in the reverse order of removal. TO SENSOR INSPECTION, REMOVAL AND INSTALLATION The tip over (TO) sensor 2 is located in the upside of the battery. (Refer to page ) Romove the fuel tank. Remove the TO sensor from the frame. Install the TO sensor in the reverse order of removal. 2 48

51 FUEL SYSTEM AND THROTTLE BODY CONTENTS FUEL SYSTEM 50 (4-2-1) REMOVAL AND DISASSEMBLY 52 (4-2-3) REASSEMBLY AND INSTALLATION 53 (4-2-4) FUEL PRESSURE INSPECTION 54 (4-2-5) 4-2 FUEL PUMP RELAY INSPECTION 54 (4-2-5) FUEL MESH FILTER INSPECTION AND CLEANING 55 (4-2-6) FUEL LEVEL GAUGE INSPECTION 55 (4-2-6) THROTTLE BODY 56 (4-2-7) REMOVAL 57 (4-2-8) CLEANING 58 (4-2-9) INSPECTION 58 (4-2-9) INSTALLATION 58 (4-2-9) 49

52 4-2-1 FUEL SYSTEM AND THROTTLE BODY FUEL SYSTEM 50

53 51 FUEL SYSTEM AND THROTTLE BODY 4-2-2

54 FUEL SYSTEM AND THROTTLE BODY REMOVAL AND DISASSEMBLY Remove the seat. ( ) Remove the front seat. ( ) Remove the fuel tank mounting bolts and fuel tank bracket mounting bolt. ( ) Remove the fuel tank mounting bolts and take off the hooks. ( ) Disconnect the fuel level gauge coupler 1. Remove the fuel pump coupler 2. Remove the fuel injector hose 3 and return hose 4. CAUTION After disconnecting the fuel injector hose 3, insert a blind plug into the end to stop fuel leakage. 4 52

55 2 FUEL SYSTEM AND THROTTLE BODY Remove the fuel tank rearward. CAUTION As gasoline leakage may occur in this operation, keep away from fire and sparks. Remove the fuel pump assembly 1 its mounting bolts diagonally. WARNING Remove the fuel gauge 2. by removing Gasoline is highly flammable and explosive. Keep heat, spark and flame away. 1 REASSEMBLY AND INSTALLATION Reassembly and installation the fuel tank in the reverse order of remval and disassembly. When installing the fuel pump assembly, first tighten all the fuel pump assembly mounting bolts lightly in diagonal stages, and then tighten them in the above tightening order. NOTE Apply a small quantity of the THREAD LOCK 1324 to the thread portion of the fuel pump mounting bolt. THREAD LOCK

56 4-2-5 FUEL SYSTEM AND THROTTLE BODY FUEL PRESSURE INSPECTION Remove the seat. Place a rag under the fuel injector hose. Disconnect the fuel injector hose from the fuel delivery pipe. Install the special tool between the fuel tank and fuel delivery pipe. Fuel pump pressure gauge : Turn the ignition switch ON position and check the fuel pressure. Fuel pressure Approx. 3.4 ~ 3.7 kgf/cm 2 (333 ~ 363 kpa, 48.4 ~ 52.6 psi) If the fuel pressure is lower than the specification, inspect the following items : * Fuel hose leakage * Clogged fuel filter * Pressure regulator * Fuel pump If the fuel pressure is higher than the specification, inspect the following items : * Fuel pump check valve * Pressure regulator WARNING Before removing the special tool, turn the ignition switch to OFF position and release the fuel pressure slowly. Gasoline is highly flammable and explosive. Keep heat, sparks and flame away. FUEL PUMP RELAY INSPECTION Fuel pump relay is located the left side of the frame. Remove the frame cover. Remove the fuel pump relay

57 4 2 FUEL SYSTEM AND THROTTLE BODY First, check the insulation between 1 and 2 terminals with pocket tester. Then apply 12 volts to 3 and 4 terminals, to 3 and to 4, and check the continuity between 1 and 2. If there is no continuity, replace it with a new one. 1 3 FUEL MESH FILTER INSPECTION AND CLEANING If the fuel mesh filter is clogged with sediment or rust, fuel will not flow smoothly and loss in engine power may result. Blow the fuel mesh filter with compressed air. NOTE If the fuel mesh filter is clogged with many sediment or rust, replace the fuel filter cartridge with a new one. FUEL LEVEL GAUGE INSPECTION Measure resistance between the terminals when float is at the position instead below. Fuel float position Resistance between terminals F Approx. 90 ~ 100 Ϊ 1/2 E Approx. 38 Ϊ Approx. 4 ~ 10 Ϊ If the resistance measured is out of the specification, replace the gauge with a new one. Fuel level meter inspection. 55

58 4-2-7 FUEL SYSTEM AND THROTTLE BODY THROTTLE BODY 56

59 FUEL SYSTEM AND THROTTLE BODY REMOVAL Remove the fuel tank. Remove the air cleaner box. Disconnect the fuel hose. Remove the all coupler to related the throttle body. Loosen the throttle body clamp screws. Disconnect the throttle cables from their drum. Dismount the throttle body assembly. CAUTION Be careful not to damage the throttle cable bracket when dismounting or remounting the throttle body assembly. After disconnecting the throttle cables, do not snap the throttle valve from full open to full close. It may cause damage to the throttle valve and throttle body. 57

60 4-2-9 FUEL SYSTEM AND THROTTLE BODY CLEANING WARNING Some throttle body cleaning chemicals, especially dip-type soaking solutions, are very corrosive and must be handled carefully. Always follow the chemical manufacturer s instructions on proper use, handling and storage. Clean all passageways with a spray-type throttle body cleaner and blow dry with compressed air. CAUTION Do not use wire to clean passageways. Wire can damage passageways. If the components cannot be cleaned with a spray cleaner it may be necessary to use a dip-type cleaning solution and allow them to soak. Always follow the chemical manufacturer s instructions for proper use and cleaning of the throttle body components. Do not apply throttle body cleaning chemicals to the rubber and plastic materials. INSPECTION Check following items for any damage or clogging. * O-ring * Secondary throttle valve * Throttle shaft bushing and seal * Injector cushion seal * Throttle valve * Vacuum hose Check fuel injector filter for evidence of dirt and contamination. If present, clean and check for presence of dirt in the fuel lines and fuel tank. CAUTION Never operate the idle screw 1 variations of the carburetion setting. to avoid 1 INSTALLATION Installation is in the reverse order of removal. Pay attention to the following points : Connect the throttle cable to the throttle cable drum. Adjust the throttle cable play with the cable adjusters. 58

61 ELECTRICAL SYSTEM CONTENTS LOCATION OF ELECTRICAL COMPONENTS 60 (6-1) IGNITION SYSTEM 62 (6-3) CHARGING SYSTEM 63 (6-7) 6 59

62 ELECTRICAL SYSTEM LOCATION OF ELECTRICAL COMPONENTS Ignition coil NO.1 Main fuse (30A) Head lamp fuse (15A) Cooling fan motor relay Head lamp relay Regulator / Rectifier Side stand relay Main relay Fuel pump relay Turn signal relay Battery ECU TO sensor 14 TP sensor 15 IAT sensor Magneto Pick-up coil GP switch 60

63 ELECTRICAL SYSTEM 6-2 SAV solenoid IAP sensor NO.2 Ignition coil NO.2 ISC solenoid Oxygen sensor Fuel injector NO.1 Fuel injector NO.2 61

64 6-3 ELECTRICAL SYSTEM IGNITION SYSTEM ENGINE STOP S/W IG. S/W Ft. IGNITION COIL Rr. IGNITION COIL ECU G L Y Y Y REG REC FUSE BATTERY 12V 12Ah 62

65 ELECTRICAL SYSTEM 6-7 CHARGING SYSTEM Regulator / Rectifier IG. switch A. C generator IC Battery LOAD INSPECTION MAGNETO Using the pocket tester, measure the resistance between the lead wires in the following table. If the resistance is not within the specified value, replace the stator coil, with a new one. Stator coil resistance Pick-up coil Charging coil Ϊ Ϊ Standard G-L 110 ~ 140 Y-Y 0.2 ~ 0.4 Pocket Tester : Tester knob indication : Resistance ( Ϊ ) CAUTION When mounting the stator on magneto cover, apply a small quantity of THREAD LOCK 1324 to the threaded parts of screws. THREAD LOCK

66 ELECTRICAL SYSTEM REGULATOR / RECTIFIER Disconnect the regulator / rectifier couplers. Using the pocket tester, measure the resistance between the terminals in the following table. If the resistance checked is incorrect, replace the regulator / rectifier Unit : MΪ Tester probe Tester probe Pocket tester : Tester knob indication : Resistance (MΪ ) 64