Yamaha MBK MW125 2014 Service Manual

SELF-DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE9-5EAS20116SELF-DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLEEAS31118SELF-DIAGNOSTIC FUNCTION TABLEEAS31259COMMUNICATION ERROR WITH THE YAMAHA DIAGNOSTIC TOOLEAS31120DIAGNOSTIC CODE: SENSOR OPERATION TABLEFault code No. Item12 Crankshaft position sensor: no normal signals are received from the crankshaft positionsensor.13 Intake air pressure sensor: open or short circuit detected.14 Intake air pressure sensor: system malfunction (clogged or detached).15 Throttle position sensor: open or short circuit detected.16 Throttle position sensor: stuck throttle position sensor is detected.19 Sidestand switch: a break or disconnection of the blue/yellow lead of the ECU is detect-ed.21 Coolant temperature sensor: open or short circuit detected.22 Intake air temperature sensor: open or short circuit detected.24 O2 sensor: no normal signals are received from the O 2 sensor.30 Latch up detected.37 Engine speed is high when the engine is idling.39 Injector: open or short circuit detected.41 Lean angle sensor: open or short circuit detected.42 Speed sensor: no normal signals are received from the speed sensor.44 EEPROM fault code number: an error is detected while reading or writing on EEPROM.46 Charging voltage is abnormal.50 Faulty ECU memory. (When this malfunction is detected in the ECU, the fault code num-ber might not appear on the tool display.)61 ISC (idle speed control) unit: open or short circuit detected.79Engine speed is high when the Engine is idling.Deceleration is poor when the vehicle is ridden.Bad condition of engine or sensor.Fault code No. ItemWaiting for con-nectionECU (engine control unit) internal malfunction (output signal error): signals cannot betransmitted between the ECU and the Yamaha diagnostic tool.Er-4 ECU (engine control unit) internal malfunction (input signal error): non-registered datahas been received from the Yamaha diagnostic tool.Diagnosticcode No. Item Meter display Procedure01 Throttle position sensor sig-nal• Fully closed position 14–20 Check with throttle valve fullyclosed.• Fully open position 97–107 Check with throttle valve fullyopen.