Adjust the engine idle speed periodically on the engine at normal operating temperature.
To adjust the idle speed:

Engine oil and filter change
Throtile cable playSpecial tools and equipment
Recommended service material
Note
required service material is also described in the following.
“Clutch control system components” “clutch components”
Special tool
...
DTC “c15” (p0115-h/l): ect sensor circuit
malfunction
Detected condition and possible cause
Detected condition
Possible cause
C15
Output voltage is not with in the following
range.
0.15 V ≤ Sensor voltage < 4.85 V
Ect sensor circuit open or short.
Ect sensor malfunction.
Ec ...
Starter motor inspection
Refer to “starter motor disassembly and assembly” .
Carbon brush
Inspect the carbon brushes for abnormal wear, cracks or
smoothness in the brush holder.
If either carbon brush is defective, replace the brush
holder set with a new one.
Measure the length “a” of the carbon brushes using a
v ...