Yamaha MBK MW125 2014 Service Manual

FUEL INJECTION SYSTEM8-34Fault code No. 152 Defective intake air pressuresensor.Execute the diagnostic mode.(Code No. 03)When engine is stopped:Atmospheric pressure at thecurrent altitude and weatherconditions is indicated.At sea level: Approx. 101 kPa(757.6 mmHg, 29.8 inHg)1000 m (3300 ft) above sea lev-el: Approx. 90 kPa (675.1mmHg, 26.6 inHg)2000 m (6700 ft) above sea lev-el: Approx. 80 kPa (600.0mmHg, 23.6 inHg)3000 m (9800 ft) above sea lev-el: Approx. 70 kPa (525.0mmHg, 20.7 inHg)When engine is cranking: Makesure that the indication valuechanges.The value does not changewhen engine is cranking. →Check the intake air pressuresensor.Replace the throttle body, if de-fective.Refer to “THROTTLE BODY” onpage 7-7.Fault code No. 14Item Intake air pressure sensor: system malfunction (clogged or de-tached).Fault code No. 15Item Throttle position sensor: open or short circuit detected.Fail-safe system Able to start engineAble to drive vehicleDiagnostic code No. 0101Tool displayThrottle position sensor signal• 14–20 (fully closed position)• 97–107 (fully open position)Procedure • Check with throttle valve fully closed.• Check with throttle valve fully open.Item Probable cause of malfunc-tion and check Maintenance job Confirmation of service com-pletion1 Connection of throttle body sen-sor assembly coupler.Check the locking condition ofthe coupler.Disconnect the coupler andcheck the pins (bent or brokenterminals and locking conditionof the pins).Improperly connected → Con-nect the coupler securely or re-place the wire harness.Turn the main switch to “ON”.Fault code number is not dis-played → Service is finished.Fault code number is displayed→ Go to item 2.