Yamaha R1 2004 ServiceManual
Here you can view all the pages of manual Yamaha R1 2004 ServiceManual. The Yamaha manuals for Motorcycle are available online for free. You can easily download all the documents as PDF.
Page 401
8-8 IGNITION SYSTEMELEC EAS00735 IGNITION SYSTEM CIRCUIT DIAGRAM
Page 402
8-9 IGNITION SYSTEMELEC 1Main switch 4Fuse (main) 6Battery 10Starting circuit cut-off relay 11Neutral switch 12Sidestand switch 14E.C.U. 15Ignition coil #1 16Ignition coil #2 17Ignition coil #3 18Ignition coil #4 19Spark plug 31Crankshaft position sensor 35Cylinder identification sensor 36Lean angle cut-off switch 53Engine stop switch 59Clutch switch 73Fuse (ignition)
Page 403
8-10 YESNO 2. Battery Check the condition of the battery. Refer to “CHECKING AND CHARGING THE BATTERY” in chapter 3. Minimum open-circuit voltage 12.8 V or more at 20C (68F) Is the battery OK? Clean the battery terminals. Recharge or re- place the battery. EAS00739 YESNO EAS00741 3. Spark plugs The following procedure applies to all of the spark plugs. Check the condition of the spark plug. Check the spark plug type. Measure the spark plug gap. Refer to “CHECKING THE SPARK PLUGS” in chapter 3....
Page 404
8-11 IGNITION SYSTEMELEC NOYES 1 a 2 4. Ignition spark gap The following procedure applies to all of the spark plugs. Disconnect the spark plug cap from the spark plug. Connect the ignition checker and spark plug cap as shown. Set the main switch to “ON”. Measure the ignition spark gap . Crank the engine by pushing the starter switch and gradually increase the spark gap until a misfire occurs. Minimum ignition spark gap 6 mm (0.24 in) Is there a spark and is the spark gap within...
Page 405
8-12 IGNITION SYSTEMELEC 6. Crankshaft position sensor resistance Disconnect the crankshaft position sensor coupler from the wire harness. Connect the pocket tester (Ω 100) to the crankshaft position sensor coupler as shown. Positive tester probe gray Negative tester probe black 1 2 Measure the crankshaft position sensor resistance. Crankshaft position sensor resistance 336 504 Ω at 20C (between gray and black) Is the crankshaft position sensor OK? YESNO Replace the crankshaft position...
Page 406
8-13 IGNITION SYSTEMELEC 12. Starting circuit cut-off relay (diode) Disconnect the starting circuit cut-off relay coupler from the wire harness. Connect the pocket tester (Ω 1) to the starting circuit cut-off relay coupler as shown. Check the starting circuit cut-off relay for continuity. Positive tester probe blue / yellow Negative tester probe sky blue 1 2 EAS00753 Positive tester probe blue / yellow Negative tester probe blue / black Continuity 1 3 Positive tester probe sky blue...
Page 407
8-14 1Main switch 4Fuse (main) 6Battery 8Starter relay 9Starter motor 10Starting circuit cut-off relay 11Neutral switch 12Sidestand switch 53Engine stop switch 54Start switch 73Fuse (ignition) ELECTRIC STARTING SYSTEMELEC EAS00755 ELECTRIC STARTING SYSTEM CIRCUIT DIAGRAM
Page 408
8-15 ELECTRIC STARTING SYSTEMELEC EAS00756 STARTING CIRCUIT CUT-OFF SYSTEM OPERATION If the engine stop switch is set to “ ” and the main switch is set to “ON” (both switches are closed), the starter motor can only operate if at least one of the following conditions is met: The transmission is in neutral (the neutral switch is closed). The clutch lever is pulled to the handlebar (the clutch switch is closed) and the sidestand is up (the sidestand switch is closed). The starting circuit cut-off relay...
Page 409
8-16 YESNO 3. Starter motor Connect the positive battery terminal and starter motor lead with a jumper lead . Repair or replace the starter motor. A wire that is used as a jumper lead must have at least the same capacity or more as that of the battery lead, other- wise the jumper lead may burn. This check is likely to produce sparks, therefore make sure nothing flammable is in the vicinity. Does the starter motor turn? WARNING 1 23 EAS00758 YESNO 2. Battery Check the condition of the battery....
Page 410
8-17 4. Starting circuit cut-off relay Disconnect the starting circuit cut-off relay coupler from the wire harness. Connect the pocket tester (Ω 1) and bat- tery (12 V) to the starting circuit cut-off relay coupler as shown. YESNO Replace the starting circuit cut-off relay. Positive tester probe blue / white Negative tester probe blue / white Does the starting circuit cut-off relay have continuity between blue / white and blue / white ? 1 2 3 4 EAS00759 Positive battery terminal red / black...