NOt that it pertains to you persay, but figured I'd mention that if the user has a Zeitronix WB02 they can use their 0-5V user input and log it with the seperate USB output for the Zeitronix unit. Just another way its possible for some people.

 

Log the original address for front O2 sensor at any MUT location (MUT19 if you do the mod properly or 0x6A6F ). You'll just need to get an equation to evaluate the flow properly.

 

actually I want to connect the wideband to a free input of the ECU.

For example the pressure in the fuel tank.

Then read the input in evoscan.

There are guys here who do it with MAP sensors, which are not available on the EDM car.

My question is:

If I connect the wideband to the MAP input pin (92 or 93) how do I log it in evoscan? Do I have to change something in the MUT?

Thanks for the reply

 

Can somebody help me?

thanks

mlocatel

 

Did you verify that the ADC input I described is unused, i.e., no wire is attached to that pin on the ECU harness?

 

yes, it's free

Also the input for the MAP is free

 

Fuel tank pressure input on USDM Evo 9s is read at ADC 0C. For your ROM, the 8 bit value for ADC 0C is written to FFFF6AD0. The 10 bit value is written to FFFF6AD2. For a wideband, its better to log the 8 bit value as it has sufficient resolution and can be read with a 1-byte request in Evoscan. FFFF6AD1 is what you'd want to log, and its at MUT 39. Just write an entry in Evoscan.

 

mrfred, is it possible to log the map sensor (MUT 38) with a 10 bit resolution?

 

Nope. 10 bit resolution requires logging two MUT channels just like 2-byte load or 2-byte RPM. If you want to do it, set one MUT table entry to 0x6AD2 and another to 0x6AD3. Then setup an entry in EvoScan for these channels.

 

Thanks a lot for the help... I really needed more resolution, as i am using a turboxs 4 bar map sensor to log boost, and when i tested it with a vaccum/boost pump, it gave me:
0.235 volts @ 0 bar (abs vaccum)
2.607 volts @ 4 bar

Which gives me a voltage range of only 2.37 volts for 4 bar, which equates to only 120 levels in the adc. My actual resolution is of only 0.47 psi/step with an 8-bit adc.

 

What ROM do you have? If you are logging boost, you might as well use the MAP sensor ADC input.

 

using 88840017.

I already have my map sensor connected to pin 94 (MAP sensor adc input).

 

What I wrote about 10 bit resolution is only for ADC 0C. Do you want it for the MAP sensor ADC input?

 

a 4 bar sensor with only 2.5v of range???

 

Thank you very much mrfred

mlocatel