Visually inspect the isc valve if necessary.

Throttle body inspection and cleaning
Throttle valve synchronizationPrecautions
Precautions for clutch system
Refer to “general precautions” in section 00 (page 00-1).
Schematic and routing diagram
Clutch cable routing diagram
Refer to “throttle cable routing diagram” in section 1d .
Diagnostic information and procedures
Clutch system symptom diagnosis
...
Cylinder head cover disassembly and
assembly
Disassembly
Remove the cylinder head cover. Refer to “engine top side disassembly” .
Remove the gaskets (1) and (2).
Remove the pair control solenoid valve (3) along
with the pair reed valve covers (4).
Remove the pair reed valves (5) and cmp sensor
(6).
As ...
DTC “c46” (p1657-h/l or p1658): excv
actuator circuit malfunction
Detected condition
Possible cause
C46
The operation signal does not reach the
excv actuator.
Excva position sensor voltage low or
high
0.14 V ≤ Sensor voltage < 4.9 V
(without the above range)
excva can not operate properly.
Excva ...