Inspect the speed sensor in the following procedures:
Special tool
: 09900–25008 (multi circuit tester
set)
Tester knob indication
voltage (
)

|
| Note while testing, the highest voltage reading should be the same as the battery voltage (12 v). |

Speed sensor removal and installation
Oil pressure indicator inspectionStv actuator removal and installation
Refer to “throttle body disassembly and assembly” in section 1d .
Caution
never remove the stva from the throttle
body.
Isc valve inspection
Refer to “dtc “c40” (p0505 / p0506 / p0507): isc valve circuit malfunction”
in section 1a .
Isc valve removal and installation
Refer t ...
Engine top side disassembly
It is unnecessary to remove the engine assembly from
the frame when servicing the cylinder head cover and
camshafts.
Note
before servicing the engine top side
components (until camshafts removal) with
the engine in place, remove the following
parts:
air cleaner box
...
DTC “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.
...