The exhaust control system (excs) consists of the exhaust control valve (excv), exhaust control valve actuator (excva) and exhaust control valve cables (excv cables).
Excv is installed in the exhaust pipe. Excva is mounted inside of the right frame. The excv is operated by the excva via the cables. This system is designed to improve the engine torque at low engine rpm.

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Exhaust control system operationSpecifications
Service data
Electrical
unit: mm (in)
Tightening torque specifications
Reference: for the tightening torque of fastener not specified in this
section, refer to “tightening torque list” in section 0c . ...
Self-diagnostic procedures
Use of mode select switch
Note
do not disconnect the coupler from ecm,
battery cable from battery, ecm ground
wire from engine or main fuse before
confirming dtc (diagnostic trouble code)
stored in memory. Such disconnection
may erase memorized information in ec ...
Throttle body components
Fuel delivery pipe
Fuel delivery pipe t-joint
O-ring
Tp sensor
Stp sensor
Secondary fuel injector
Primary fuel injector
Cushion seal
Isc valve
Air screw
Vacuum hose
Evap system purge control solenoid valve
For e-33 only
3.5
...