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Throttle valve issues - no signal from ECU


E

Emilliaan

New member
Joined
May 15, 2019
Messages
2
Location
Košice
Hello, so I am a new member here coming for help, first of all sorry for my English. I own a motor from bike Yamaha MT09 2015 and it seems to have problems with ECU.
When I turn the key ON it will not start because the throttle bodies are always closed.. they wont open when the motor is starting or when it runs. When I turn the ignition ON, the relay is working, the fuel pump is working, sparks are ok, fuel injectors are ok but the throttle valve is always closed. I can start the motor only by opening the throttle valves by pushing them by hand and the motor runs ok without problems..
So next thing I tried to connect a 6 volt battery to the servo motor that opens the throttle and they open very nice so the servo motor is ok, also fuse "ETV" is ok. I checked all the wiring, all connectors, all fuses, relay, all sensors, I tried disconnecting all the sensors and nothing is working.
The problem is that ECU is NOT giving power to the servo motor. When the motor runs it has also no response from the "gas pedal". What could be blocking the ECU to not open the throttle valve? I said it is running smoothly when I open them with hand, when I release them the motor dies.. I have to mention that last thing that has been done to ECU is that it has turned off the immobiliser by "professional" without opening the cover of ECU
I am desperate please help.. I was trying everything for like 5 days now. I could go for Yamaha diagnostic but the nearest dealer is like 40 km away from me but I think I have no choice. All info will be appreciated.
 
That man, who sold me the motor lost the keys, so I will not be able to start the motor without the keys, so he send ECU to some buddy that has the immo turned off..
 
For circuit use it's interesting to turn off the immobilizer because you also remove all the system to save weight.
On the 09 it's possible to do because it's not implemented in all the countries, it depends on the insurrance local law.
 
Not sure I'd believe in a little over 3 years someone has managed to lose both black keys and the red key.

I'd be more concerned it's a stolen bike you've bought, or a crashed/recovered one. Wouldn't have touched it with a barge pole if I'm honest.
 
Otters Pocket said:
Not sure I'd believe in a little over 3 years someone has managed to lose both black keys and the red key.

I'd be more concerned it's a stolen bike you've bought, or a crashed/recovered one. Wouldn't have touched it with a barge pole if I'm honest.
Click to expand...

Stranger things have happened, but I agree...should be good bikes for sale without having the deal with that kind of thing.

OP, good luck with getting it fixed, hope it works out...
 
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