Octavian
Veteran Member
Folks
I need to play a little bit with N75 and MAP signals on my 2.5TDI V6.
The nicest/least invasive way to do it is to get plugs/sockets/wires from the dealer and put together a couple of makeshift "tuning boxes".
Can you feed me with part numbers for MAP (pressure) sensor plug and a matching socket, and which repair wires I have to get?
And part numbers for N75 valve plug and the matching socket, and repair wires for both ends?
The N75 is part: 1J0 906 627 B , the MAP is part: 038 906 051 B
I need plug and socket set for each, plus all repair wires needed to wire them up. Think extension cords, that's effectively what I want to make for each.
As for the circuitry, I'll make final decisions next week when I get my picoscope so that I can see the N75 signal in more detail. But it's likely to be a shunt capacitor or series diode/shunt capacitior on N75 to extend duty cycle (to correct my slow pressure buildup with rpm problem following hybrid installation, described in another thread).
On the MAP, Zener diode with series resistor clamped on the pressure signal. 3.9V zener with 1k-10k resistor (will have to check) to provide linear (ie stock) pressure signal up to 2 bar, and then 50% reduced slope to get 2.5bar where 2.25bar is reported to ECU.
In return for help, I promise to post schematics with values for both circuits and relevan parts of VAG-COM logs. They sure will not replace a chip, but for people on a budget this might be interesting. Think of it as an advanced Evry mod on air
I need to play a little bit with N75 and MAP signals on my 2.5TDI V6.
The nicest/least invasive way to do it is to get plugs/sockets/wires from the dealer and put together a couple of makeshift "tuning boxes".
Can you feed me with part numbers for MAP (pressure) sensor plug and a matching socket, and which repair wires I have to get?
And part numbers for N75 valve plug and the matching socket, and repair wires for both ends?
The N75 is part: 1J0 906 627 B , the MAP is part: 038 906 051 B
I need plug and socket set for each, plus all repair wires needed to wire them up. Think extension cords, that's effectively what I want to make for each.
As for the circuitry, I'll make final decisions next week when I get my picoscope so that I can see the N75 signal in more detail. But it's likely to be a shunt capacitor or series diode/shunt capacitior on N75 to extend duty cycle (to correct my slow pressure buildup with rpm problem following hybrid installation, described in another thread).
On the MAP, Zener diode with series resistor clamped on the pressure signal. 3.9V zener with 1k-10k resistor (will have to check) to provide linear (ie stock) pressure signal up to 2 bar, and then 50% reduced slope to get 2.5bar where 2.25bar is reported to ECU.
In return for help, I promise to post schematics with values for both circuits and relevan parts of VAG-COM logs. They sure will not replace a chip, but for people on a budget this might be interesting. Think of it as an advanced Evry mod on air