Honda NSA700A DN-1 2009, Service Manual

Page: 647 / 654

TROUBLESHOOTING
14. Over H eating Inspection
Check fo r engine over heating.
Is th e e n g in e o v e r h e a tin g ?
YES - • Coolant level too low
• Fan m o to r not w orking
• Therm ostat stuck closed
• Excessive carbon build-up in com bustion cham ber
• Use o f poor q u a lity fuel
• W rong type o f fuel
• Clutch slipping
NO - G O TO STEP 15.
15. Engine Knocking Inspection
Accelerate or run at high speed.
Is th e e n g in e k n o c k in g ?
YES - • W orn piston and cylinder
• W rong type of fuel
• Excessive carbon build-up in com bustion cham ber
• Ignition tim in g too advance (Faulty ECM)
• Faulty CKP sensor
• Faulty CMP sensor
• Faulty knock sensor
POOR PERFORMANCE AT LOW AND IDLE SPEED
1. Spark Test
Perform spark test.
Is th e re w eak o r in te rm itte n t s p a rk?
YES - • Faulty spark plug
• Fouled spark plug
• Loose o r disconnected ig n itio n system w ires
• Faulty CKP sensor
• Faulty ig n itio n coil
• Faulty engine stop switch
• Faulty ECM
NO - G O TO STEP 2.
2. Ig n itio n T im ing Inspection
Check ig n itio n tim in g .
Is the ig n itio n tim in g c o rre c t?
NO - • Faulty ECM
• Faulty CKP sensor
• Faulty TP sensor
YES - GO TO STEP 3.
3. Fuel Pum p Inspection
Check the fuel pum p (page 6-41).
Is the fu e l p u m p n o rm a l?
NO - Faulty fuel pum p
YES - GO TO STEP 4.
4. Program m ed Fuel Injection System Inspection
Check the fuel injection system (page 6-5).
Is the fu e l in je ctio n system norm al?
YES - GO TO STEP 5.
NO - Faulty fuel injection system.
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