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.
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..