Honda CBR650F Service Manual page 142

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TROUBLESHOOTING
• Make sure the battery is fully charged and in good condition.
• Check for a blown main fuse (30 A) and sub fuse (ENG STOP; 7.5 A). (Check for a short circuit in the related
wires if the fuse is blown again)
• The starter motor should operate with the following conditions:
– Transmission in neutral or clutch lever squeezed with sidestand retracted
– Ignition switch turned ON with engine stop switch turned " "
– Starter switch pushed
Starter motor does not turn
1. Starter Relay Switch Operation Inspection
Check the operation of the starter relay switch as above starting conditions (page 6-7).
Does the starter relay switch click?
YES
NO
2. Starter Motor Inspection
Apply battery voltage directly to the starter motor and check the operation. (A large amount of current flows,
so do not use a thin wire)
Does the starter motor turn?
YES
NO
3. Relay Coil Power Input Line Inspection
Check the power input line of the starter relay switch (page 6-7).
Is the input line normal?
YES
NO
4. Relay Coil Ground Line Inspection
Check the ground line of the starter relay switch (page 6-8).
Is the ground line normal?
YES
NO
5. Starter Relay Switch Inspection
Check the starter relay switch (page 6-8).
Is the starter relay switch normal?
YES
NO
Starter motor turns slowly
• Low battery voltage
• Poorly connected battery cables
• Poorly connected starter motor cable
• Faulty starter motor
Starter motor turns, but engine does not turn
• Faulty starter clutch or starter gear train (page 11-15)
• Faulty ignition system (page 5-3)
– GO TO STEP 2.
– GO TO STEP 3.
– • Poorly contacted starter motor cable
• Faulty starter relay switch (page 6-8)
– Faulty starter motor
– GO TO STEP 4.
– • Faulty ignition switch (page 21-15)
• Faulty engine stop switch (page 21-17)
• Faulty starter switch (page 21-17)
• Loose or poor contact of the related connector terminal
• Open circuit in wire harness
– GO TO STEP 5.
– • Faulty neutral switch (page 21-18)
• Faulty neutral diode (page 6-9)
• Faulty sidestand switch (page 21-19)
• Faulty clutch switch (page 21-18)
• Loose or poor contact of the related connector terminal
• Open circuit in wire harness
– Loose or poor contact of the starter relay switch connector terminal
– Faulty starter relay switch
ELECTRIC STARTER
6-3