ELECTRICAL SYSTEM 9-23
Step 2
1) Measure the battery voltage between input lead wires (R/W and B/W) at the ECM with the ignition switch
in the “ON” position.
Is the voltage OK?
Step 3
Measure the ignition coil primary peak voltage. (!9-24)
NOTE:
The ignition coil peak voltage inspection method is applicable only with the multi-circuit tester and peak volt
adaptor.
Is the peak voltage OK?
Step 4
1) Inspect the spark plug. (!2-7)
Is the spark plug OK?
Step 5
1) Inspect the ignition coil. (!9-24 and -25)
Is the ignition coil OK?
Step 6
1) Measure the CKP sensor peak voltage and its resistance.
NOTE:
The CKP sensor peak voltage inspection is applicable only with the multi-circuit tester and peak volt adap-
tor.
Is the peak voltage and resistance OK?
YES Go to Step 3.
NO
• Faulty ignition switch.
• Faulty turn signal/side-stand switch relay.
• Faulty engine stop switch.
• Broken wire harness or poor connection of related circuit couplers.
YES Go to Step 4.
NO Go to Step 5.
YES
• Improper spark plug connection.
• Go to Step 5.
NO Faulty spark plug.
YES Go to Step 6.
NO Faulty ignition coil.
YES
• Faulty ECM.
• Faulty wire harness.
• Improper ignition coupler connection.
NO Faulty CKP sensor.
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