The Original ECM from the diesel engine is still in my Volvo V50 viewtopic.php?p=81063&hilit=v50#p81063. On the original conversion they connected an mbed NXP LPC1768 to the ECM (crank sensor, cam sensor and engine temp) and the CEM for the fuel sensor.
- There is no code to be found (only Hello world) on the mbed (when I connect it to my laptop and it shows up as an USB station).
- There is an external EEPROM connected to the i2c. I tried to get the code from it via a dump with a arduino, but that gave only a long list of the numbers 255. In the beginning a few others, but not enough to be the code.
- One pin gives a constant pwm signal (so I assume there is some sort of program on it)
- Can the code be stored on an other place which is'nt shown on the usb interface? Is it possible to extract the needed can commands if I find the code?
My options are:
- Program the zombie to give the embed the correct commands (if I can find out what these are)
- write a new program for the mbed (that is difficult for me as I have no experience with this board an the support is stopping in 2026 so no usable interface anymore by then)
- change the embed for an arduino and write new code for it
- use the Zombieverter to provide the 2 pwm signals (with different frequenties) and the 0-5v fuel and temp sensor. Can this be done? Do I have to add this to the firmware? I only see one programmable pwm signal.
- A way better solution????
This is the last thing I have to figure out to get the car driving and ready for the annual checkup (APK, MOT). When the ECM thinks the engine is running, the powersteering starts working. And I expect ABS (and other possible) problems when it thinks the engine is not running while driving.
Thanks in advance
