Yamaha YZF-R1(B) 2012 Service Manual

Also see for YZF-R1 2012: Service manual

Contents

ELECTRICAL COMPONENTS8-148EAS14B1101CHECKING THE FUEL INJECTORS1. Remove:• Fuel tankRefer to “FUEL TANK” on page 7-1.• Air filter upper cover (for secondary injec-tor)Refer to “AIR FILTER CASE” on page 7-5.2. Check:• Fuel injector resistanceOut of specification → Replace the fuelinjector.▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼a. Disconnect the fuel injector lead couplerfrom wire harness.b. Connect the pocket tester (Ω × 1) to thefuel injector coupler.c. Measure the fuel injector resistance.▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲Pocket tester90890-03112Analog pocket testerYU-03112-CResultNeutral positionContinuityPositive tester probeSky blue “1”Negative tester probeSensor terminal “a”1st positionContinuityPositive tester probeWhite “2”Negative tester probeSensor terminal “b”2nd positionContinuityPositive tester probePink “3”Negative tester probeSensor terminal “c”3rd positionContinuityPositive tester probeYellow/White “4”Negative tester probeSensor terminal “d”4th positionContinuityPositive tester probeWhite/Red “5”Negative tester probeSensor terminal “e”5th positionContinuityPositive tester probeOrange “6”Negative tester probeSensor terminal “f”6th positionContinuityPositive tester probeGray “7”Negative tester probeSensor terminal “g”Fuel injector resistance(Primary injector/Secondaryinjector)12.0 Ω at 20 °C (68 °F)Pocket tester90890-03112Analog pocket testerYU-03112-C• Positive tester probeInjector terminal “1”• Negative tester probeInjector terminal “2”