Yamaha Wr250r 2008 Manual
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FUEL INJECTION SYSTEM 8-40 49 Intake solenoidActuates the intake solenoid for five times every second. Illuminates the engine trouble warning light.Check the operating sound of the solenoid five times. 50 Fuel injection system relayActuates the fuel injection sys- tem relay for five times every second. Illuminates the engine trouble warning light. (The engine trouble warning light is OFF when the relay is ON, and the engine trouble warning light is ON when the relay is OFF).Check the operating sound of the relay five times. 51 Radiator fan motor relayActuates the radiator fan motor relay for five times every sec- ond. (ON two seconds, OFF three seconds) Illuminates the engine trouble warning light.Check the operating sound of the relay five times. 52 Headlight relayActuates the headlight relay for five times every five-second. (ON two seconds, OFF three seconds) Illuminates the engine trouble warning light five times.Check the operating sound of the headlight relay five times. 53 EXUP servo motorTurn the servo motor once in the open direction and then in the close direction. Illuminates the engine trouble warning light.Check the operating sound of the EXUP motor. Diagnos tic monitori ng code No.Item Actuation Checking method
FUEL INJECTION SYSTEM 8-41 EAS27480 TROUBLESHOOTING DETAILS This section describes the measures per fault code number displayed on the meter. Carry out check and maintenance on items or components that could be a cause of malfunction in accordance with the order. When the check and maintenance of malfunctioned part is completed, restore the meter display ac- cording to the “Reinstatement method”. Fault code No.: Fault code number displayed on the meter when the engine failed to work normally. Refer to “DIAG- NOSTIC MODE” on page 8-34. Diagnostic monitoring code No.: Code number to be used when the diagnostic monitoring mode is operated. Refer to “DIAGNOSTIC MODE” on page 8-34. Fault code No. 12 SymptomNo normal signals are received from the crankshaft position sensor. Diagnostic monitoring code No.—— OrderItem/components and probable cause Check or maintenance jobReinstatement method 1 Installed condition of crankshaft position sensorCheck the installed area for loose- ness or pinching.Cranking the engine. 2 Connected state of connector Crankshaft position sensor coupler Main wire harness ECU coupler Check the coupler for any pins that may have pulled out. Check the locking condition of the coupler. If there is a malfunction, repair it and connect it securely. 3 Open or short circuit in wire harness. Repair or replace if there is an open or short circuit. Between the crankshaft position sensor coupler and ECU coupler. (Green/White – Green/White) (Black/Blue – Black/Blue) 4 Defective crankshaft position sensor. Replace if defective. Refer to “CHECKING THE CRANKSHAFT POSITION SEN- SOR” on page 8-75.
FUEL INJECTION SYSTEM 8-42 Fault code No. 13 Symptom Intake air pressure sensor-open or short circuit detected. Diagnostic monitoring code No.03 Intake air pressure sensor OrderItem/components and probable cause Check or maintenance jobReinstatement method 1 Connected state of connector Intake air pressure sensor coupler Main wire harness ECU coupler Check the coupler for any pins that may have pulled out. Check the locking condition of the coupler. If there is a malfunction, repair it and connect it securely.Turning the main switch ON. 2 Open or short circuit in wire harness. Repair or replace if there is an open or short circuit. Between intake air pressure sen- sor coupler and ECU coupler (Black/Blue – Black/Blue) (Pink/White – Pink/White) (Blue – Blue) 3 Defective intake air pressure sensor Execute the diagnostic monitoring mode. (Code No.03) Replace if defective. Refer to “CHECKING THE IN- TAKE AIR PRESSURE SEN- SOR” on page 8-80. Fault code No. 14 SymptomIntake air pressure sensor-hose system malfunction (clogged hose). Diagnostic monitoring code No.03 Intake air pressure sensor OrderItem/components and probable cause Check or maintenance jobReinstatement method 1 Intake air pressure sensor hose clogged. Check the intake air pressure sen- sor hose condition. Repair or replace the sensor hose.Starting the engine and operating it at idle. 2 Intake air pressure sensor malfunction at intermediate electrical potential. Check and repair the connection. 3 Connected state of connector Intake air pressure sensor coupler Main wire harness ECU coupler Check the coupler for any pins that may have pulled out. Check the locking condition of the coupler. If there is a malfunction, repair it and connect it securely. 4 Defective intake air pressure sensor Execute the diagnostic monitoring mode. (Code No.03) Replace if defective. Refer to “CHECKING THE IN- TAKE AIR PRESSURE SEN- SOR” on page 8-80.
FUEL INJECTION SYSTEM 8-43 Fault code No. 15 Symptom Throttle position sensor-open or short circuit detected. Diagnostic monitoring code No.01 Throttle position sensor OrderItem/components and probable cause Check or maintenance jobReinstatement method 1 Installed condition of throttle position sen- sor. Check the installed area for loose- ness or pinching. Check that is installed in the speci- fied position.Turning the main switch ON. 2 Connected state of connector Throttle position sensor coupler Main wire harness ECU coupler Check the coupler for any pins that may have pulled out. Check the locking condition of the coupler. If there is a malfunction, repair it and connect it securely. 3 Open or short circuit in wire harness and/ or sub lead. Repair or replace if there is an open or short circuit. Between throttle position sensor coupler and ECU coupler (Black/Blue – Black/Blue) (Yellow – Yellow) (Blue – Blue) 4 Throttle position sensor lead wire open circuit output voltage check. Check for open circuit and replace the throttle position sensor. (Black/Blue – Yellow) Open circuit item Output voltage Ground wire open circuit5 V Output wire open circuit0 V Power supply wire open circuit0 V 5 Defective throttle position sensor. Execute the diagnostic monitoring mode. (Code No.01) Replace if defective. Refer to “CHECKING THE THROTTLE POSITION SEN- SOR” on page 8-79.
FUEL INJECTION SYSTEM 8-44 Fault code No. 16 Symptom Stuck throttle position sensor detected. Diagnostic monitoring code No.01 Throttle position sensor OrderItem/components and probable cause Check or maintenance jobReinstatement method 1 Installed condition of throttle position sen- sor. Check the installed area for loose- ness or pinching. Check that is installed in the speci- fied position.Reinstated by starting the engine, operating it at idle. And then racing it. 2 Defective throttle position sensor. Execute the diagnostic monitoring mode. (Code No.01) Replace if defective. Refer to “CHECKING THE THROTTLE POSITION SEN- SOR” on page 8-79. Fault code No. 17 Symptom EXUP servo motor circuit open or short circuit Diagnostic monitoring code No.53 EXUP servo motor OrderItem/components and probable cause Check or maintenance jobReinstatement method 1 Connected state of connector. EXUP servo motor coupler Wire harness ECU coupler Check the coupler for any pins that may have pulled out. Check the locking condition of the coupler. If there is a malfunction, repair it and connect it securely.Turn the main switch to “ON”. 2 Open or short circuit in wire harness. Repair or replace if there is an open or short circuit. Between EXUP servo motor cou- pler and ECU coupler (Black/Blue – Black/Blue) (White/Red – White/Red) (Blue – Blue) 3 Defective EXUP servo motor Execute the diagnostic monitoring mode. (Code No.53) Replace if defective.
FUEL INJECTION SYSTEM 8-45 Fault code No. 18 Symptom EXUP servo motor is stuck. Diagnostic monitoring code No.53 EXUP servo motor OrderItem/components and probable cause Check or maintenance jobReinstatement method 1 Connected state of connector. EXUP servo motor coupler Wire harness ECU coupler Check the coupler for any pins that may have pulled out. Check the locking condition of the coupler. If there is a malfunction, repair it and connect it securely.Turn the main switch to “ON”. 2 Open or short circuit in wire harness. Repair or replace if there is an open or short circuit. Between EXUP servo motor cou- pler and ECU coupler (Black/Red – Black/Red) (Black/Green – Black/Green) 3 Defective EXUP servo motor Execute the diagnostic monitoring mode. (Code No.53) Replace if defective. 4 Defective EXUP valve, pully and cable. Replace if defective. Fault code No. 19 SymptomOpen circuit is detected in the input line from the sidestand switch to the ECU. Diagnostic monitoring code No.20 Sidestand switch OrderItem/components and probable cause Check or maintenance jobReinstatement method 1 Connected state of connector Main wire harness ECU coupler Execute the diagnostic monitoring mode. (Code No.20) Check the coupler for any pins that may have pulled out. Check the locking condition of the coupler. If there is a malfunction, repair it and connect it securely.If the transmis- sion is in gear, retracting the sidestand. If the transmis- sion is in neutral, reconnecting the wiring. 2 Open or short circuit in wire harness. Repair or replace if there is an open or short circuit. Between relay unit and main switch coupler. (Blue/Yellow – Blue/Yellow) Between ECU and main switch coupler. (Blue/Black – Blue/Black) 3 Defective sidestand switch. Replace if defective. Refer to “CHECKING THE SWITCHES” on page 8-63.
FUEL INJECTION SYSTEM 8-46 Fault code No. 21 Symptom Coolant temperature sensor-open or short circuit detected. Diagnostic monitoring code No.06 Coolant temperature sensor OrderItem/components and probable cause Check or maintenance jobReinstatement method 1 Installed condition of coolant temperature sensor. Check the installed area for loose- ness or pinching.Turning the main switch ON. 2 Connected state of connector Coolant temperature sensor coupler Main wire harness ECU coupler Sub-wire harness coupler Check the coupler for any pins that may have pulled out. Check the locking condition of the coupler. If there is a malfunction, repair it and connect it securely. 3 Open or short circuit in wire harness and/ or sub lead. Repair or replace if there is an open or short circuit. Between coolant temperature sen- sor coupler and ECU coupler. (Black – Black/Blue) (Black – Green/Red) 4 Defective coolant temperature sensor. Execute the diagnostic monitoring mode. (Code No.06) Replace if defective. Refer to “CHECKING THE COOL- ANT TEMPERATURE SENSOR” on page 8-78.
FUEL INJECTION SYSTEM 8-47 Fault code No. 22 Symptom Intake air temperature sensor-open or short circuit detected. Diagnostic monitoring code No.05 Intake air temperature sensor OrderItem/components and probable cause Check or maintenance jobReinstatement method 1 Installed condition of intake air tempera- ture sensor. Check the installed area for loose- ness or pinching.Turning the main switch ON. 2 Connected state of connector Intake air temperature sensor coupler Main wire harness ECU coupler Check the coupler for any pins that may have pulled out. Check the locking condition of the coupler. If there is a malfunction, repair it and connect it securely. 3 Open or short circuit in wire harness and/ or sub lead. Repair or replace if there is an open or short circuit. Between intake air temperature sensor coupler and ECU coupler. (Black/Blue – Black/Blue) (Brown/White – Brown/White) 4 Defective intake air temperature sensor. Execute the diagnostic monitoring mode. (Code No.05) Replace if defective. Refer to “CHECKING THE IN- TAKE AIR TEMPERATURE SEN- SOR” on page 8-80. Fault code No. 30 SymptomLatch up detected. No normal signal is received from the lean angle sensor. Diagnostic monitoring code No.08 Lean angle sensor OrderItem/components and probable cause Check or maintenance jobReinstatement method 1 The vehicle has overturned. Raise the vehicle upright. Turning the main switch ON (how- ever, the engine cannot be restarted unless the main switch is first turned OFF). 2 Installed condition of the lean angle sen- sor Check the installed area for loose- ness or pinching. 3 Connected state of connector Lean angle sensor coupler Main wire harness ECU coupler Check the coupler for any pins that may have pulled out. Check the locking condition of the coupler. If there is a malfunction, repair it and connect it securely. 4 Defective lean angle sensor. Execute the diagnostic monitoring mode. (Code No.08) Replace if defective.
FUEL INJECTION SYSTEM 8-48 Fault code No. 33 Symptom Malfunction detected in the primary wire of the ignition coil. Diagnostic monitoring code No.30 Ignition coil OrderItem/components and probable cause Check or maintenance jobReinstatement method 1 Connected state of connector Ignition coil primary side coupler (Orange) Main wire harness ECU coupler Check the coupler for any pins that may have pulled out. Check the locking condition of the coupler. If there is a malfunction, repair it and connect it securely.Starting the engine and oper- ating it at idle. 2 Open or short circuit in wire harness or sub lead. Repair or replace if there is an open or short circuit. Between ignition coil coupler and ECU coupler/main wire harness. (Orange – Orange) 3 Defective ignition coil Execute the diagnostic monitoring mode. (Code No.30) Test the primary and secondary coils for continuity. Replace if defective. Refer to “CHECKING THE IGNI- TION COIL” on page 8-74. Fault code No. 41 Symptom Lean angle sensor-open or short circuit detected. Diagnostic monitoring code No.08 Lean angle sensor OrderItem/components and probable cause Check or maintenance jobReinstatement method 1 Connected state of connector Lean angle sensor coupler Main wire harness ECU coupler Check the coupler for any pins that may have pulled out. Check the locking condition of the coupler. If there is a malfunction, repair it and connect it securely.Turning the main switch ON. 2 Open or short circuit in wire harness. Repair or replace if there is an open or short circuit. Between switch coupler and ECU coupler. (Black/Blue – Black/Blue) (Yellow/Green – Yellow/Green) (Blue – Blue) 3 Defective lean angle sensor Execute the diagnostic monitoring mode. (Code No.08) Replace if defective. Refer to “CHECKING THE LEAN ANGLE SENSOR” on page 8-75.
FUEL INJECTION SYSTEM 8-49 Fault code No. 42 SymptomA. No normal signals are received from the speed sensor. B. Open or short circuit is detected in the neutral switch. Diagnostic monitoring code No.A 07 Speed sensor B 21 Neutral switch OrderItem/components and probable cause Check or maintenance jobReinstatement method A-1 Installed condition of speed sensor Check the installed area for loose- ness or pinching.Starting the engine, and inputting the vehicle speed signals by oper- ating the motor- cycle at a low speed of 20 – 30 km/h. A-2 Connected state of connector. Speed sensor coupler Wire harness ECU coupler Check the coupler for any pins that may have pulled out. Check the locking condition of the coupler. If there is a malfunction, repair it and connect it securely. A-3 Open or short circuit in speed sensor lead. Repair or replace if there is an open or short circuit. Between sensor coupler and ECU coupler. (Blue – Blue) (White – White) (Black/Blue – Black/Blue) A-4 Defective speed sensor. Execute the diagnostic monitoring mode. (Code No.07) Replace if defective. Refer to “CHECKING THE SPEED SENSOR” on page 8-77.