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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:

Corrosion prevention
It is important to take good care of your motorcycle to protect it from corrosion and keep it looking new for years to come. Important information about corrosion Common causes of corrosion Accumulation of road salt, dirt, moisture, or chemicals in hardto- reach areas.  Chipping ...

DTC “c41” (p2505): ecm power input signal malfunction
Detected condition and possible cause Detected condition Possible cause C41/P2505 No voltage is applied to the ecm. Lead wire/coupler connection of ecm terminal to fuel fuse. Fuel fuse. Wiring diagram Troubleshooting C ...

Cooling fan relay inspection
Inspect the fan relay in the following procedures:  remove the frame covers. Refer to “exterior parts removal and installation” in section 9d (page 9d- 6).  Remove the cooling fan relay (1). First check the insulation between “a” and “b” terminals with tester. Then ap ...

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