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My best friend finally decided to put an MRE on his daily driver.

The car had initially a 1.6 8v TU5J2 NFW 105hp that was swapped out with a 1.6 16v TU5J4 NFX 120hp from the scrap yard.
I'm trying to locate a wiring diagram with the ECU pinout for this engine but all I can find is this http://www.autoelectric.ru/auto/citroen/saxo/nfx/nfx.htm but it shows a hall crank position sensor and the engine we have has a VR.
Searching on Autodoc to see what kind of spare part comes OEM confused me even more because for this engine it give both 2 pin and 3 pin sensors and it also gives cam position sensors but our engine doesn't even have one.

Do you know any source for wiring diagrams that could help?

Did some wiring tracing on the car and turns out that the schematic I found is mostly correct. Some differences in wires could be because of the different chassis but they are easily rectified.
Trigger wheel is 60-2 with a VR sensor.
Dwell time in idle for ignition coil is 5.1ms.
Next time I will measure injector dead time with a current probe.

To the questions now.
As you can see in the wiring the injectors are wired in pairs. Is it possible to connect all 4 injector drivers of TLE8888 and fire them in pairs so that I won't exceed 2.2A of their current limit? Solved.
Has anyone tried to drive an idle stepper motor from TLE8888? If not I can wire in an external stepper driver board like Frankenso since I already have one.
Stock ECU has a VSS input from a sensor that seems to be directly powered from 12V so I assume its output is 12V square wave. I can double check with the oscilloscope at a later date because I need to dig out the wire from the harness.
If I wanted to feed this signal to MRE where should I connect it? I'm thinking of putting a resistor and a 5.1V zener and feeding it to an analog input.

The VSS with 12v is probably an hall sensor, but they aren't all the same.

Basically, an hall sensor has 3 wires, +12v (or 5v), Ground and signal. The signal is commonly a ground signal, so you have to put a pullup for testing (commonly a +5V with a 1 - 3K ohms resistor) You will have a square signal. ( 0 to 5V with a +5V pullup, even if the sensor has +12v)
But sometimes, the hall sensor already has a pullup, and use the +12v to send a positive signal.

The cam input signal from MRE is designed for hall sensor, and has a inboard +3.3v pullup, you just have to plug the signal to it if your hall sensor is "common"

I took more measurements and without the ecu plugged in I have 7V on that pin so it seems it has a pull up to 7V inside the cluster. Same goes for the rpm signal to the cluster.

Στάλθηκε από το VOG-L29 μου χρησιμοποιώντας Tapatalk

Can you try with +5V instead of +12V ?