2JZGTE VVTi OBD Scanning and Information

While I had a stock engine and ECU I really strugged to find much information or tools to scan the 2JZGTE VVTi engine in my supra, standard OBDII tools did not seem to work. Some guys had tried and failed or got mixed results. I did find a guy in the UK that found out how, but it seemed one of his friends was a Toyota Mechanic and had access to an expensive scanner tool which wasn’t an option for me.

I’ve hopefully now found some basic information for the Toyota Supra 2JZGTE VVTi ECU;

-Is not OBDII compliant, it uses an JOBD compliant protocol as it’s a Japanese ECU –
-Uses a OBDII connector but requires a scan tool with correct software to read the correct protocol which is ISO 14230

It now seems like there is a cheap solution for reading the protocol; Thanks to Muzzytt on supraforums.com.au and Konrad on mkivsupra.net for sharing this information around on the forums.

Requirements;

Now from some reading those settings mean;

  • ATIB96 = Set the ISO baud rate to 9600bps
  • ATIIA 13 = Set ISO (slow) Init Address to 13
  • ATSH8213F0 = Set Header to 8213F0
  • ATSP4 = Set protocol to 4 (ISO 14230-4 KWP (5 baud init, 10.4Kbaud))
  • 0100 = Start Sending Data

Notes;

I’m no expert on OBD and still would like any further information on the subject if possible relating to specifically the 2JZGTE VVTi ECU. Also this is information that other internet users have published and I also do not know the owners of the scanning tools or software, plus I have not personally tried this but lots of others have with success.

14 thoughts on “2JZGTE VVTi OBD Scanning and Information”

  1. i put the 2jz gte vvti in a 93 mazda and would like to view my live data but i would need to attack a obd2 connector to do so. are there any wright ups that anyone knows of on how to do that?

    1. Hi Aaron,

      Sounds like a fun project! I’m not sure on the whole process or if there is a write-up but 2 of the commenter’s here said that Techstream and Greddy infometer is an option. If I was you I’d look at a few options and see if anyone running the 2JZGTE VVTi is using any of those tools. I’ve seen a few people on the UK forums use the earlier Greddy Infometer and get live data but not the specific error codes, the new version of the Greddy touch and the BLitz RVit are also meant to get the actual codes, not just list them- they also provide live data so might be worth checking them out.

  2. does it matter which elm327 scanner tool i get, as long as it reads iso14230? there are many on ebay most cheaper than the one in the link in this write-up. my concern with this elm327 scanner is that in the description it says it reads obd2 and eobd (euopean) but it doesnt mention jobd for japanese, it also says at the bottom of the description in red that it may not work with some apps such as Torque, which happens to be the other suggestion in this write-up

  3. Both Global Techstream, (Cloned Mongoose VCI Ebay Find), and Torque Pro, (Amazon ELM327 wireless bluetooth), scanned just fine in the Scrapyard Scamp, (Aristo VVTi, 1971 Plymouth Valiant Scamp). On our Tweaked Performance Harness we had Cam add the SIL lead and we pinned that to PIN 7 of a standard J1962, Obd2 Connector. Pins 4&5 were put on chassis grounds and Pin 16 was constant power. Thanks to you guys for the Advanced Torque Pro strings. Techstream Global is pretty slow and data refresh rates are not very speedy. Greddy Infometer Touch would be a good option to consider here.

    1. Hi,

      I’m not 100% sure as I haven’t personally used it or tried the software or other USB cables but I can give you the following info;

      Software – Looks like all the USB tools come with their own software tool so using PC software with the ELM327 tool should be fine, the tool does say it supports pretty much all Windows operating systems back from 98!!!

      Hardware – It seems the USB device you linked to does read the ISO 14230 protocol and also has a 16pin connector – so it “should” connect and work correctly – although I can’t confirm. But I noticed the software included is only supported on Windows XP.

      Hope this helps you out 🙂

    2. I have one of the mini VCI cables like the one in your link and it works great. With one of those cables you’ll use Toyota Techstream and have the options of changing the Region to Japan to connect to Japanese vehicles. I have a Toyota Epic boat with a 1UZ-FE engine that works with this configuration using the manual vehicle selection with the Toyota Celsior ( JDM car w/ 1UZ-FE ).

      The Techstream solution is the tool that dealerships use now and gives you an out of the box capability for reading / clearing codes and viewing live data. The ELM solution requires you to know PIDs for nonstandard live data and does not give you the ability to set vehicle options, etc.

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