Monday, September 19, 2011 - 10:11 pm, by: Brett Harrison(Bretto)
I'm after something that will read a OBD port, rectangular port in engine bay. As I have no other way of reading for fault codes, as the 1UZFE has been transplanted.
Ive noticed several scan tools available, but have no idea which one will read a 94 Celsior engine.
Tuesday, October 04, 2011 - 08:56 am, by: Nathan Cryer(Redrodeo)
Have you used the standard ECU with your transplant? If you have connect a light to the "check" wire from the ECU and follow the paper clip diagnostics. The light will flash any fault codes.
The diagnostics port is unique to Toyota, it is not OBD1. I have tried a SnapOn scan tool but it only wants to talk to the inside round port.
Tuesday, October 04, 2011 - 12:27 pm, by: Brett Harrison(Bretto)
Its running std ecu. The diagnostic port has an output 'W' which is CEL output. In diagnostics mode it does give out a reading via the multimeter. However the voltage is in mV, and hard to read with out a test light. So I might need to get a low voltage LED to read it.
Tuesday, October 04, 2011 - 06:34 pm, by: Nathan Cryer(Redrodeo)
On the Soarer ECU it grounds the check light. Power for the light comes from the gauge fuse then through the light and then to the ECU to be grounded. Check the wiring diagram and the end of the diagnostics page. http://soarercentral.com/sc-forum/messages/1113/862.html?1100787369
Tuesday, October 04, 2011 - 07:54 pm, by: Brett Harrison(Bretto)
Thanks for that Nathan,
Now that check light, is connected to 'W' in the diagnostics port, if I run a check light straight off that to ground, that should flash as per dash right ? Its definitely cycling a code when in diagnostics mode through 'W' port, but voltage is very low, not enough to run a light that I'm aware of. Is this correct, or have I overly simplified this ?
Sunday, March 02, 2014 - 05:36 pm, by: Ian Rigby(Hiro)
Tom Richards wrote on Saturday, March 01, 2014 - 02:23 pm:
OBD2 started in the mid 90's and i would think toyota would be leading the way.
OBDII was introduced in the US in about 1996 or so, Toyota actually took quite a while (say mid 2000s) to properly adopt it in Aus at least (not sure about Japan) - for that 10 year period they had their own proprietary setup that looks "like" OBDII but wasn't.
If anyone is interested to know I have purchased an Actron CP9690 OBD scanner and it works great on my 1991 UZZ31. Plugs into the round circular plug under the dash, does not work using the rectangular plug into the port on top of the engine (eventhough it comes with the rectangular plug). Reads error codes and as well reads live data and all the other features..
Hi Daniel, I'm pretty sure that I was able to retrieve codes, but thinking back I don't recall having any codes to read at the time, but recall seeing live data okay. Easier to use a paper clip and retrieve codes that way via port under the dash
Friday, April 30, 2021 - 03:21 pm, by: Daniel Burns(Danny)
Thanks,I've used scan tools before at an auto electrician and they give more precise error details, but they probably also cost a lot more. Maybe I'll try the paper clip under the dash, for the auto.