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Suzuki GSX-R 1000 Service Manual: Exhaust control system operation

The excs is operated by the signal supplied from the ecm. The open/close operation of the excv is performed by the excva which is controlled by the ecm by changing the current direction of the actuator motor. The position sensor (incorporated in the excva) detects the excva movement by measuring the voltage and then the ecm determines the excv opening angle based on the engine rpm and gear positions. Every time the ignition switch is turned on, the excva automatically drives the excv and detects full close/open position voltages and sets the excv to middle position.

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Suzuki GSX-R. Full close


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Suzuki GSX-R. Full open


Exhaust control system description
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 ex ...

Repair instructions
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Other materials:

Location of parts
ciutch lever  left handlebar switches indicator lights tachometer ignition switch front brake fluid reservoir  right handlebar switches throttle grip  front brake lever  fuel tank cap front suspension spring pre-load and rebound damping force ...

Voltage check
If voltage is supplied to the circuit being checked, voltage check can be used as circuit check.  With all connectors/couplers connected and voltage applied to the circuit being checked, measure voltage between each terminal and body ground.  If measurements were taken as shown ...

Special tools and equipment
Special tool ...

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