Crankshaft Sensor Peak Voltage Inspection
Be sure the battery is fully charged.
Remove the alternator outer cover (see Alternator Outer
Remove all the spark plug caps but do not remove the
Disconnect the crankshaft sensor lead connector.
Connect the peak voltage adapter [A] to a digital meter
Special Tool - Peak Voltage Adapter: 57001-1415
Insert the adapter probes into the connector [C] of the
crankshaft sensor as shown in the figure.
Turn the ignition switch and the engine stop switch ON.
Pushing the starter button, turn the engine 4 ∼ 5 seconds
with the transmission in neutral to measure the crankshaft
sensor peak voltage.
Repeat the measurements 5 or more times.
Crankshaft Sensor Peak Voltage
If the reading is less than the specified value, replace the
If the reading is normal, check the ECU.
If the peak voltage adapter is not available, the coil can
be checked for the broken or badly shorted winding with
the tester (see Crankshaft Sensor Inspection).
Interlock Operation Inspection
Raise the rear wheel off the ground with jack (see Rear
Wheel Removal in the Wheels/Tires chapter).
Start the engine to the following conditions.
Transmission Gear → 1st position
Clutch Lever → Release
Sidestand → Down or Up
Turn the ignition switch ON and push the starter button.
Then the starter motor should not turn when the starter
system circuit is normality.
If the engine is start, inspect the starter lockout switch,
neutral switch and relay box.
If their parts are normality replace the ECU.
Adapter (R, +)
Adapter (BK, –)
2.5 V or more
ELECTRICAL SYSTEM 16-57