FUEL INJECTION SYSTEM
8-49
Fault code No. 79
3
Wire harness continuity.
Open or short circuit
→
Replace
the wire harness.
Between ISC valve coupler and
ECU coupler.
Pink–Pink
Gray–Gray
Green/yellow–Green/yellow
Sky blue–Sky blue
Set the main switch to “ON”.
Fault code number is not dis-
played
→
Service is finished.
Fault code number is displayed
→
Go to item 4.
4
Faulty ISC valve operation.
Execute the diagnostic mode.
(Code No. D54)
ISC valve operation sound is
not heard.
→
Replace the ISC
valve.
Refer to “CLEANING THE ISC
(IDLE SPEED CONTROL)
UNIT AND THROTTLE BODY”
on page 7-9.
Set the main switch to “ON”.
Fault code number is not dis-
played
→
Service is finished.
Fault code number is displayed
→
Go to item 5.
5
Malfunction in ECU
Replace the ECU.
Refer to “REPLACING THE
ECU (engine control unit)” on
page 8-59.
Fault code No.
61
Item
ISC (idle speed control) unit: open or short circuit detected.
Fault code No.
79
Item
Engine speed is high when the Engine is idling.
Deceleration is poor when the vehicle is ridden.
Bad condition of engine or sensor.
Fail-safe system
Able to start engine
Able to drive vehicle
Diagnostic code No.
01, 03
01
Meter display
Throttle 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.
03
Meter display
Displays the intake air pressure.
Procedure
Extend the sidestand, and then operate the throttle while pushing the
start switch. (If the display value changes, the performance is OK.)
Item
Probable cause of malfunc-
tion and check
Maintenance job
Confirmation of service com-
pletion
1
Locate the malfunction.
Check engine idling speed.
Engine idling speed is high.
→
Go to item 2.
Engine idling speed is not high.
→
Go to item 6.
2
Installed condition of YMJET
(Yamaha Mixture Jet) sub pas-
sage.
Check the YMJET sub-pas-
sage for disconnections, loose-
ness, and tears.
Start the engine and let it idle
for approximately 10 seconds.
Fault code number is not dis-
played
→
Service is finished.
Fault code number is displayed
→
Go to item 3.
Содержание MBK MW125 2014
Страница 1: ...SERVICE MANUAL MW125 2014 MW125F 2015 2CM F8197 E0...
Страница 6: ......
Страница 8: ......
Страница 49: ...LUBRICATION POINTS AND LUBRICANT TYPES 2 20...
Страница 52: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 23 EAS30021 LUBRICATION DIAGRAMS 1 3 2...
Страница 53: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 24 1 Oil strainer 2 Oil pump assembly 3 Camshaft...
Страница 54: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 25 2 3 4 5 1...
Страница 56: ...COOLING SYSTEM DIAGRAMS 2 27 EAS20020 COOLING SYSTEM DIAGRAMS 1 2 4 3 5 6 9 8 3 4 5 7...
Страница 60: ...CABLE ROUTING 2 31 Steering head left side view A A A A 1 2 2 2 1 1 2 1 2 1 2 B...
Страница 62: ...CABLE ROUTING 2 33 Front wheel left side view 1 2 1 1 1...
Страница 63: ...CABLE ROUTING 2 34 1 Speed sensor lead 2 Front brake hose...
Страница 64: ...CABLE ROUTING 2 35 Throttle body and rear wheel left and right side view 2 2 1 1 A B A C D D E E F G H D E 3...
Страница 66: ...CABLE ROUTING 2 37 Front frame right side view...
Страница 70: ...CABLE ROUTING 2 41 Front frame left side view 1 2 3 4 5 6 7 8 9 10 A 4 7 5 6 11 13 12...
Страница 74: ...CABLE ROUTING 2 45 Front frame top view 1 2 3 4 2 3 4 5 6 12 10 11 13 7 8 8 9 A 2 3 5 4 6...
Страница 76: ...CABLE ROUTING 2 47 Rear frame top view 1 2 3 4 5 6 7 8 9 10 11 12 13 14 A B...
Страница 78: ...CABLE ROUTING 2 49...
Страница 81: ......
Страница 129: ...GENERAL CHASSIS 8 4 20 a Fit the projections on the front side panel into the slots in the side cowling...
Страница 205: ...ENGINE INSPECTION 5 2 10 Install Center cover Refer to GENERAL CHASSIS 1 on page 4 1...
Страница 248: ...V BELT AUTOMATIC TRANSMISSION 5 45 a 1 2...
Страница 270: ...CRANKSHAFT 5 67...
Страница 282: ...WATER PUMP 6 11...
Страница 287: ...FUEL TANK 7 4 Refer to INSTALLING THE FUEL TANK on page 7 2...
Страница 296: ...THROTTLE BODY 7 13...
Страница 298: ...IGNITION SYSTEM 8 1 EAS20072 IGNITION SYSTEM EAS30490 CIRCUIT DIAGRAM...
Страница 302: ...ELECTRIC STARTING SYSTEM 8 5 EAS20073 ELECTRIC STARTING SYSTEM EAS30493 CIRCUIT DIAGRAM...
Страница 307: ...ELECTRIC STARTING SYSTEM 8 10...
Страница 308: ...CHARGING SYSTEM 8 11 EAS20074 CHARGING SYSTEM EAS30496 CIRCUIT DIAGRAM...
Страница 311: ...CHARGING SYSTEM 8 14...
Страница 312: ...LIGHTING SYSTEM 8 15 EAS20075 LIGHTING SYSTEM EAS30498 CIRCUIT DIAGRAM...
Страница 316: ...SIGNALING SYSTEM 8 19 EAS20076 SIGNALING SYSTEM EAS30500 CIRCUIT DIAGRAM...
Страница 322: ...FUEL INJECTION SYSTEM 8 25 EAS20078 FUEL INJECTION SYSTEM EAS30504 CIRCUIT DIAGRAM...
Страница 349: ...FUEL INJECTION SYSTEM 8 52...
Страница 350: ...ELECTRICAL COMPONENTS 8 53 EAS20089 ELECTRICAL COMPONENTS 1 2 3 4 5 6 9 11 12 10 8 7 13 17 18 19 23 22 21 20 14 15 16...
Страница 366: ...ELECTRICAL COMPONENTS 8 69...
Страница 375: ...SELF DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE 9 8...
Страница 377: ......
Страница 378: ......