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TROUBLESHOOTING
21-2
TROUBLESHOOTING
ENGINE DOES NOT START OR IS HARD TO START
1. Spark Plug Inspection
Remove and inspect spark plug.
Is the spark plug in good condition?
NO
–
• Incorrect spark plug heat range
• Incorrect spark plug gap
• Dirty air cleaner
YES
–
2. Spark Test
Perform spark test.
Is there good spark?
NO
–
• Faulty spark plug
• Loose or disconnected ignition system wires
• Broken or shorted spark plug wire
• Faulty ignition coil
• Faulty CKP sensor
• Faulty ignition switch
• Faulty ECM
• Faulty engine stop switch (CM and U type)
YES
–
3. Fuel Pump Inspection
Check for operation of the fuel pump and inspect the fuel flow.
Is the fuel pump unit normal?
NO
–
Faulty fuel pump unit
YES
–
4. PGM-FI System Inspection
Check the PGM-FI system.
Is the PGM-FI system normal?
NO
–
Faulty PGM-FI system
YES
–
5. Cylinder Compression
Test cylinder compression.
Is the compression specified?
YES
–
• Valve stuck open
• Worn cylinder and piston rings
• Damaged cylinder head gasket
• Seized valve
• Improper valve timing
NO
–
6. Engine Starting Condition
Start by following normal procedure.
Does the engine start then stops?
YES
–
• Faulty IACV
• Leaking insulator or intake manifold
• Improper ignition timing (Faulty ECM or CKP sensor)
• Contaminated fuel
Содержание CBR125R
Страница 38: ...MEMO...
Страница 56: ...MEMO...
Страница 84: ...MEMO...
Страница 94: ...FUEL SYSTEM PGM FI 5 2 FUEL SYSTEM PGM FI COMPONENT LOCATION 1 2 N m 0 1 kgf m 0 9 lbf ft...
Страница 213: ...9 1 9 9 CYLINDER PISTON COMPONENT LOCATION 9 2 SERVICE INFORMATION 9 3 TROUBLESHOOTING 9 3 CYLINDER PISTON 9 4...
Страница 214: ...CYLINDER PISTON 9 2 CYLINDER PISTON COMPONENT LOCATION...
Страница 224: ...MEMO...
Страница 248: ...ALTERNATOR STARTER CLUTCH 11 2 ALTERNATOR STARTER CLUTCH COMPONENT LOCATION 64 N m 6 5 kgf m 47 lbf ft...
Страница 260: ...CRANKSHAFT BALANCER TRANSMISSION 12 2 CRANKSHAFT BALANCER TRANSMISSION COMPONENT LOCATION...
Страница 282: ...MEMO...
Страница 392: ...MEMO...
Страница 416: ...MEMO...
Страница 417: ...20 1 20 20 WIRING DIAGRAMS ED E F II G type 20 3 CM type 20 4 U type 20 5...
Страница 428: ...MEMO...