Thread: OBDII Data Logging TP

I'll guess I'll be patiently waiting for tuner code



Currently we have map tracing via Data Scan, but it does not allow for Data Logging. Since it's hard to drive and constantly watch the map trace (tuning for mid throttle to high throttle, WOT is much easier to tune for).

Data Scan does offer data logging, RPM and timing, from there I can kinda assume where on TP I am, but I would rather know for sure.

Other then that TP wont really be needed, Map Tracing logging would be nice

I will like to have TP in some consult register. Calum mentioned register 06 is commonly used for second MAF sensor, which is something we dont have and could easily use for TP.

Nissan DataScan's Map tracing is good and all, but you cant log it.

I use Calumsult to feed consult registers to Innovate's Logworks and log it all. I need to log TP for more accuracy when tuning and stop making long calculations at different points of the log to determine which TP scale to change.

Calum had some instructions for the very much loved OBDI B13 ECU here

How to: add TP streaming on B13/S13 etc ecus - SR20 Forum

Possibilities of wideband logging/display using Realtime ECU? - SR20 Forum

He mentioned its even easier on the B14 ECU, but I never found out how: again the unloved and abandoned OBDII B14...

Could you share what address this TP is and how to reference it for consult?

It's a byte at 0x31B0. If you can tell me what consult register you want to use for it, I can give you an address for that too.

Dave

Is that possible on B14's?

Lets make it the consult register 06 for the right hand MAF sensor or second MAF sensor.

I thought I found this register at FE06 but maybe Im missing this TP byte....

EDIT: I need to practice my hexes, FE0C it was

Yes.

Ok, set:
0xFE0C = 0xB0
0xFE0D = 0x31
0xFE0E = 0xAF
0xFE0F = 0x31

Try that.

Dave

Got it, will try and let all know.

If it shows in any consult program with logging capability such as Nissan Datascan, it will be a very useful tuning tool.

Thanks!


This will show the TP used for the fuel map right? Is this useful as well to find cells on the timing maps?

Yes, it's the TP used for both fuel and timing maps. the problem you may run into is how the value is reported. Datascan will probably report it as a voltage, but you should be able to take that value * 200 / 256 to get TP as used in the maps. Try it and see.

Dave