Need Help Finding a JOBD Scanner for Live Data (MAF/Fuel) for Vitz Thesis Project! - Toyota Yaris Forums

fulltimeboomer · 03-03-2025, 06:38 AM

Hi all,

I’m an engineering student working on my thesis , and I’m stuck. I need to pull live MAF sensor and fuel data from my JDM Toyota Vitz (2004, OBD2 connector but uses ISO protocols, JOBD?) to simulate airflow for CFD analysis of swirl generators I’m designing on the throttle body. The goal is to see if increased turbulence affects engine power output.

What I’ve tried:

Techstream cable : Failed to communicate with the ECU.

ELM327 adapter : No luck (probably because it’s standard OBD2-only).

I’ve researched scanners like the ANCEL JP700 (claims J.OBD support) and Autel AL519 (but I read it might not work for J.OBD). Can anyone here recommend a scanner that definitively pulls live data from a JDM Vitz using J.OBD?

Requirements:

Must support JOBD protocol (non-standard OBD2).

Needs to display live MAF and fuel trim data .

Budget is tight (student discounts or affordable options welcome).

I’ve heard mixed things about the ANCEL JP700—does it work reliably for the Vitz? Are there alternatives? I’m desperate for advice, as this is blocking my thesis progress.

Any help is immensely appreciated ! Happy to provide more details.

Thanks!

komichal · 03-04-2025, 09:26 AM

7 years ago I bought a ripoff version of Techstream solution. Worked like a charm.
It was older version of this: https://www.ebay.com/itm/37566995454...3ABFBM-IjUmKxl

btw is there any theory why turbulence in the intake should improve anything? The flap in the throttle body will stop any turbulence anyway...

fulltimeboomer · 03-04-2025, 01:26 PM

Hey , I bought a cable from ebay the J2534 one but i didn't work some issue with the drivers i tried downloading drivers from the xHorse website but i gave up on it, now i heard that USDM and JDM Vitz have interchangeable ECUs so that would mean that their communication standards are identical so i'm banking on that being true.

My running theory as supported by other studies is that increased turbulence increases fuel atomisation leading to a more uniform combustion and flame propagation. Studies i found ran on ethanol or some mixture of ethantol and they showed a 17% increase in power at 3000 ish rpm but tapered off and actually lost power at high rpms since the swirl generator became a disturbance and increased back pressure. They used different designs though, i'm using a tape swirl design

03-03-2025, 06:38 AM	#1
fulltimeboomer Drives: Toyota Vitz 2004 Join Date: Mar 2025 Location: Malta Posts: 2	Need Help Finding a JOBD Scanner for Live Data (MAF/Fuel) for Vitz Thesis Project! Hi all, I’m an engineering student working on my thesis , and I’m stuck. I need to pull live MAF sensor and fuel data from my JDM Toyota Vitz (2004, OBD2 connector but uses ISO protocols, JOBD?) to simulate airflow for CFD analysis of swirl generators I’m designing on the throttle body. The goal is to see if increased turbulence affects engine power output. What I’ve tried: Techstream cable : Failed to communicate with the ECU. ELM327 adapter : No luck (probably because it’s standard OBD2-only). I’ve researched scanners like the ANCEL JP700 (claims J.OBD support) and Autel AL519 (but I read it might not work for J.OBD). Can anyone here recommend a scanner that definitively pulls live data from a JDM Vitz using J.OBD? Requirements: Must support JOBD protocol (non-standard OBD2). Needs to display live MAF and fuel trim data . Budget is tight (student discounts or affordable options welcome). I’ve heard mixed things about the ANCEL JP700—does it work reliably for the Vitz? Are there alternatives? I’m desperate for advice, as this is blocking my thesis progress. Any help is immensely appreciated ! Happy to provide more details. Thanks!

03-04-2025, 09:26 AM	#2
komichal View User's Garage Drives: Yaris 2007 1.3 2SZFE 64kW Join Date: May 2012 Location: CZ Posts: 328	7 years ago I bought a ripoff version of Techstream solution. Worked like a charm. It was older version of this: https://www.ebay.com/itm/37566995454...3ABFBM-IjUmKxl btw is there any theory why turbulence in the intake should improve anything? The flap in the throttle body will stop any turbulence anyway...

03-04-2025, 01:26 PM	#3
fulltimeboomer Drives: Toyota Vitz 2004 Join Date: Mar 2025 Location: Malta Posts: 2	Hey , I bought a cable from ebay the J2534 one but i didn't work some issue with the drivers i tried downloading drivers from the xHorse website but i gave up on it, now i heard that USDM and JDM Vitz have interchangeable ECUs so that would mean that their communication standards are identical so i'm banking on that being true. My running theory as supported by other studies is that increased turbulence increases fuel atomisation leading to a more uniform combustion and flame propagation. Studies i found ran on ethanol or some mixture of ethantol and they showed a 17% increase in power at 3000 ish rpm but tapered off and actually lost power at high rpms since the swirl generator became a disturbance and increased back pressure. They used different designs though, i'm using a tape swirl design