User manual SUZUKI GSX-R750 SERVICE MANUAL

[. . . ] This manual will help you know the motorcycle better so that you can assure your customers of fast and reliable service. * This manual has been prepared on the basis of the latest specifications at the time of publication. If modifications have been made since then, differences may exist between the content of this manual and the actual motorcycle. * Illustrations in this manual are used to show the basic principles of operation and work procedures. [. . . ] Replace the FP relay with a new one. 1 YES NO 4) After repairing the trouble, clear the DTC using SDS tool. (4-27) FI SYSTEM DIAGNOSIS 4-85 Step 1 (When indicating P0230-L:) 1) Turn the ignition switch OFF. (5-3) 3) Check the FP relay coupler for loose or poor contacts. · Y/B wire open or poor ] connection · O/W wire open or shorted to ground · R/BI or Y/R wire open or shorted to ground or poor W connection · If wire and connection are OK, intermittent trouble or faulty ECM. · Recheck each terminal and wire harness for open circuit and poor connection. · Replace the ECM with a known good one, and inspect it again. Replace the FP relay with a new one. 1 ECM couplers (Harness side) (Black) (Gray) YES NO 4) After repairing the trouble, clear the DTC using SDS tool. (4-27) A S P M E L 4-86 FI SYSTEM DIAGNOSIS "C42" (P01650) IG SWITCH CIRCUIT MALFUNCTION DETECTED CONDITION Ignition switch signal is not input to the ECM. POSSIBLE CAUSE · Ignition system circuit open or short · ECM malfunction When the ID agreement is not verified. · Immobilizer system malfunction ECM does not receive communication signal from the (For E-02, 19, 24) immobilizer antenna. (For E-02, 19, 24) INSPECTION * Refer to the IGNITION SWITCH INSPECTION for details. Replace the HO2 sensor with a new one. 2 ECM couplers (Harness side) YES NO When using the multi-circuit tester, do not storongly touch the terminal of the ECM coupler with a needle pointed tester probe to prevent the terminal damage or terminal bend. 6) After repairing the trouble, clear the DTC using SDS tool. (4-27) Step 1 (When indicating C44/P0135:) 1) Turn the ignition switch OFF. (5-3) 3) Check the HO2 sensor for loose or poor contacts. If OK, then measure the HO2 sensor resistance. A S P M E L 1 1 4) Disconnect the HO2 sensor coupler and measure the resistance between terminals. HO2 heater resistance: 4. 0 ­ 5. 0 at 23 °C (W ­ W) NOTE: * Temperature of the sensor affects resistance value largely. * Make sure that the sensor heater is at correct temperature. 09900-25008: Multi-circuit tester set Tester knob indication: Resistance () Is the voltage OK?Replace the HO2 sensor with a new one. 5) After repairing the trouble, clear the DTC using SDS tool. (4-27) 4-90 FI SYSTEM DIAGNOSIS Step 2 (When indicating C44/P0135:) 1) Connect the HO2 sensor coupler. 2) Insert the needle pointed probe to the HO2 sensor coupler. 3) Turn the ignition switch ON and measure the heater voltage between W (O/W) wire and ground. [. . . ] · Removing or puncturing the air cleaner case, air cleaner cover, baffles or any other component which conducts intake air. · Replacing the exhaust system or muffler with a system or muffler not marked with the same model specific code as the code listed on the Motorcycle Noise Emission Control Information label. A S P M E L 11-6 EMISSION CONTROL INFORMATION PAIR (AIR SUPPLY) SYSTEM AND EMISSION CONTROL SYSTEM INSPECTION PAIR HOSES · Inspect the PAIR hoses for wear or damage. · Inspect the PAIR hoses is securely connected. PAIR REED VALVE · Remove the cylinder head cover. (3-14) · Remove the PAIR reed valve 1 with the gasket. · Inspect the reed valve for the carbon deposit. [. . . ]