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TROUBLESHOOTING
9-1
EAS20090
TROUBLESHOOTING
EAS30599
GENERAL INFORMATION
TIP
The following guide for troubleshooting does not
cover all the possible causes of trouble. It should
be helpful, however, as a guide to basic trouble-
shooting. Refer to the relative procedure in this
manual for checks, adjustments, and replace-
ment of parts.
EAS31258
STARTING FAILURE/HARD STARTING
Engine
1. Cylinder and cylinder head
• Loose spark plug
• Loose cylinder head or cylinder
• Damaged cylinder head gasket
• Damaged cylinder gasket
• Worn or damaged cylinder
• Incorrect valve clearance
• Improperly sealed valve
• Incorrect valve-to-valve-seat contact
• Incorrect valve timing
• Faulty valve spring
• Seized valve
2. Piston and piston ring(s)
• Improperly installed piston ring
• Damaged, worn or fatigued piston ring
• Seized piston ring
• Seized or damaged piston
3. Air filter
• Improperly installed air filter
• Clogged air filter element
4. Crankcase and crankshaft
• Improperly assembled crankcase
• Seized crankshaft
Fuel system
1. Fuel tank
• Empty fuel tank
• Clogged fuel tank cap breather hole
• Deteriorated or contaminated fuel
• Clogged or damaged fuel hose
2. Fuel pump
• Faulty fuel pump
• Clogged fuel pump filter
3. Throttle body
• Deteriorated or contaminated fuel
• Sucked-in air
Electrical system
1. Battery
• Discharged battery
• Faulty battery
2. Fuse(s)
• Blown, damaged or incorrect fuse
• Improperly installed fuse
3. Spark plug
• Incorrect spark plug gap
• Incorrect spark plug heat range
• Fouled spark plug
• Worn or damaged electrode
• Worn or damaged insulator
• Faulty spark plug cap
4. Ignition coil
• Cracked or broken ignition coil body
• Broken or shorted primary or secondary coils
• Faulty spark plug lead
5. Ignition system
• Faulty ECU
• Faulty crankshaft position sensor
• Broken AC magneto rotor woodruff key
6. Switches and wiring
• Faulty main switch
• Broken or shorted wiring
• Faulty front, rear or both brake light switches
• Faulty start switch
• Faulty sidestand switch
• Improperly grounded circuit
• Loose connections
7. Starting system
• Faulty starter motor
• Faulty starter relay
• Faulty starter clutch
EAS30601
INCORRECT ENGINE IDLING SPEED
Engine
1. Cylinder and cylinder head
• Incorrect valve clearance
• Damaged valve train components
2. Air filter
• Clogged air filter element
Fuel system
1. Throttle body
• Damaged or loose throttle body joint
• Faulty ISC (idle speed control) unit
• Improper throttle grip free play
Electrical system
1. Battery
• Discharged battery
Summary of Contents for N MAX GPD150-A 2015
Page 1: ...2015 SERVICE MANUAL GPD150 A 2DP F8197 E0 ...
Page 6: ......
Page 8: ......
Page 38: ...BASIC SERVICE INFORMATION 1 29 ...
Page 46: ...SPECIAL TOOLS 1 37 ...
Page 61: ...TIGHTENING TORQUES 2 14 Cylinder head tightening sequence 4 2 5 3 1 6 ...
Page 67: ...LUBRICATION POINTS AND LUBRICANT TYPES 2 20 ...
Page 70: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 23 EAS30021 LUBRICATION DIAGRAMS 1 3 2 ...
Page 71: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 24 1 Oil strainer 2 Oil pump assembly 3 Camshaft ...
Page 72: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 25 3 2 1 4 ...
Page 74: ...COOLING SYSTEM DIAGRAMS 2 27 EAS20020 COOLING SYSTEM DIAGRAMS 8 5 7 6 4 3 2 1 7 7 6 5 4 3 2 1 ...
Page 88: ...CABLE ROUTING 2 41 Frame top view 9 A B C D 1 2 9 6 5 3 3 9 4 4 5 6 7 8 9 10 11 12 13 E ...
Page 90: ...CABLE ROUTING 2 43 Hydraulic unit top and right side view A B C 1 1 2 2 3 3 4 5 5 6 6 7 4 ...
Page 94: ...CABLE ROUTING 2 47 Fuel tank right side view A B D 1 2 2 1 3 3 4 4 5 5 7 A 6 8 9 9 C ...
Page 96: ...CABLE ROUTING 2 49 Fuel tank top and bottom view A 1 B 3 B 2 C 4 ...
Page 102: ...CABLE ROUTING 2 55 ...
Page 104: ...CHECKING THE SWITCHES LIGHTS AND SIGNALS 3 24 ADJUSTING THE HEADLIGHT BEAM 3 24 ...
Page 105: ......
Page 130: ...PERIODIC MAINTENANCE 3 25 ...
Page 136: ...GENERAL CHASSIS 1 4 3 a 1 ...
Page 148: ...GENERAL CHASSIS 5 4 15 1 b a ...
Page 220: ...STEERING HEAD 4 87 1 a b ...
Page 226: ...REAR SHOCK ABSORBER ASSEMBLIES AND SWINGARM 4 93 ...
Page 294: ...CRANKSHAFT 5 65 ...
Page 306: ...WATER PUMP 6 11 ...
Page 325: ......
Page 335: ...ELECTRIC STARTING SYSTEM 8 10 ...
Page 339: ...CHARGING SYSTEM 8 14 ...
Page 343: ...LIGHTING SYSTEM 8 18 ...
Page 381: ...FUEL INJECTION SYSTEM 8 56 ...
Page 385: ...FUEL PUMP SYSTEM 8 60 ...
Page 417: ...ABS ANTI LOCK BRAKE SYSTEM 8 92 ...
Page 446: ......
Page 447: ......