Component locationDTC “c28” (p1655): secondary throttle
valve actuator (stva) malfunction
Detected condition and possible cause
Detected condition
Possible cause
The operation voltage does not reach the stva.
Ecm does not receive communication signal from the
stva. Stva can not operate properly or its motor locked
Stva malfunction.
...
Rear sprocket / rear sprocket mounting drum removal and installation
Removal
Remove the rear wheel assembly. Refer to “rear wheel assembly removal
and installation” in section 2d .
Loosen the rear sprocket nuts.
Draw out the rear sprocket mounting drum (1) along
with the rear sprocket (2) from the wheel hub.
Remove the rear sprocket n ...
Special tools and equipment
Recommended service material
Note
required service material is also described in the following.
“Clutch control system components” “clutch components”
Special tool
...