I would like to know the pin definition of this motor. I checked the wiring diagram of the maintenance manual. No. 69 is for 6 cables. I don't know if it is, but I don't understand what the voltage or signal of each line is? Please help me. Thank you.
Need to see all the wiring diagram to answer your question. Where does line 1 go to? And, what’s the bit at the top, with the numbers 2, 5, 6, 8 etc? The ECU?
Thank you. What is the issue with your bike which is causing you to ask the question ‘how is the exhaust servo motor driven’ ? In advance of that I’ll try to explain how the entire system works and it may answer your question. This is what I believe to be the case based upon the wiring diagram presented but you’d need a multimeter to check it. BTW, I presume you’re asking in relation to the Panigale/Streetfighter V4 Desmo engine not the MultiStrada V4 GT engine? Going from right to left. The last pin on the right will equate to socket 6 on the loom connector and is the 5v supply from the BBS to the exhaust servo motor. The 2nd pin from the right links to socket 5 on the loom connector which is the return path/ground from the motor. The 2nd pin from the left is the feed from the BBS to the variable resistor part of the servo motor and links to socket on 2 on the loom connector. The pin on the far left is the ground wire for the variable resistor part of the motor assembly and links to socket 1 on the loom connector. The middle pin is the signal or measuring pin and corresponds to socket 3 on the loom connector. The voltage from this will vary as the motor moves through its cycle. Socket 4 on the loom connector is redundant. At key on the ECU instructs the BBS to operate the motor which must complete one cycle, close/open. As the motor turns it shortens a cable which pulls the valve in the exhaust from the open to the closed position. As the motor switches off the spring on the exhaust valve pulls the valve open again and pulls the cable such that the motor is returned to its resting position. The default position for the valve in the exhaust is an open position. As the motor rotates it varies the length of the resistance path, decreasing and increasing it, and the varying resistance is detected as a voltage change by the BBS, from 5v to 0.5v. At key on The BBS must see a complete cycle of voltage change ie 5v - 0.5v - 5v in order to report a clean bill of health back to the ECU. If this isn’t the case the ECU will throw an error and the Engine Management Light (EML) on the dash will be triggered. This is because the correct operation of the exhaust valve is linked to type approval for noise emissions. During engine operation the ECU instructs the BBS to commence activation of the motor, and consequent closure of the valve, around 3500 rpm. Around 4500-5000rpm the valve is fully closed and around 5500-6000rpm it’s opening again. NB these are approximate rpm figures. The exact position of the motor, and thus the valve, is measured by the BBS via the variable voltage on pin 3 and thus the BBS, and ECU, know exactly the position of the exhaust valve. Issues normally only occur because the valve itself has seized and can’t rotate fully, or at all, and thus the motor can’t rotate and the BBS doesn’t see the varying voltage it’s expecting to see from the signal wire.
Hello, thank you very much for your help. My friend gave me this thing. I try to drive it with a single-chip microcomputer for my other projects. I hope to understand what its 6 pins are. Now I have tested that the blue and green wires can make the motor rotate, and it will also rotate in reverse when connected. I don't know what the remaining pins do. I guess they are for power supply and signal feedback to the main board inside. But I don't understand what they are. The circuit diagram above doesn't correspond either. Below is my motor interface.
If you only have the motor itself the wire colours will not correspond with the colours indicated in the wiring diagram for those colours are the colours of the wires on the wiring side of the loom. The colour of the wires that run from the connector to the motor itself do not need to be (and often aren't) the same colour as the loom wires. It’s not necessary because the cable can be identified based upon which pin is going to which cable of the loom. I have no idea what you’re trying to achieve and I think we’re moving away from Ducati related things here (even if the part is from a Ducati) and I can only repeat what I wrote above. There’s a +ve and -ve to the motor, which, as it’s a simple DC motor, will reverse its rotation if the polarity is reversed. Then there’s the +ve and -ve to the variable resistor part of the assembly plus the ‘signal’ wire that measures the return voltage so the bike’s main computer knows what position the motor is in.
