Yamaha FZ09E Service Manual

FUEL INJECTION SYSTEMFault code N o. 20I ntake ai r pressure senso r 1 or in take air pressure sensor 2:Item when the main switch Is turned to " ON ", the Intake air pres-sure sensor 1 voltage and intake air pressure senso r 2 volt-age differ greatly.1 Defective intake air pressure Execute the diagnostic Turn the ma in switch to "ON".sensor 1. mode. (Code No. 03) Fault code nu mber is not dis-When engine is stopped: played -+ Service is finished.Atmospheric pressure at the Fault code number is dis-current altitude and weather played -+ Go to item 2.conditions is indicated.Om above sea leve l: Approx.101 kPa (757.6 mm Hg, 29.8in Hg)3000 m (9800 ft) above sealevel: Approx . 70 kPa (525.0mmHg, 20.7 inHg)Displayed value is incorrect-+ Check the intake air pres-sure sensor 1.Replace if defective.Refer to "CHECKING THEINTAKE AIR PRESSURESENSOR" on page 8· 109.2 Defective intake air pressure Execute the diagnostic Turn the main switch to "ON".sensor 2. mode. (Code No. 04) Fault code number is not dis-When engine is stopped: played -+ S ervice is finished.Atmospheric pressure at the Fault code number is dis-current altitude and weather played -+ Go to item 3.conditions is indicated.Om above sea leve l: Approx.101 kPa (757.6 mm Hg, 29 .8in Hg)3000 m (9800 ft) above sealevel: Approx. 70 kPa (525.0mmHg, 20.7 inHg)Displayed value is incorrect-+ Check the intake air pres-sure sensor 2.Replace if defective.Refer to "CHECKING THEINTAKE AIR PRESSURESENSOR" on page 8-109.3 Ma lfunction in E CU. Replace the E CU.Refer to " REPLACING THEECU (engine control unit)" onpage 8-93.8-47