4AGE 20V Blacktop Diagnostic Tool

[kingtube69]

Hi All,

I'm a long time lurker first time poster! I recently picked up a 4AGE 20V Blacktoop converted AE92

I'm a complete noob to the 4AGE 20V engines and I think I would get a better insight as to what is happening with this engine if I got a Diagnostic tool.

The only issue is I have no idea about what connector it is, where the connector is etc? I have seen a connector in the engine bay which reads "Diagnostic" but I'm not sure if that would be where i connect the tool and what plug it is.

I may be able to take a photo when I go home today if that helps at all.

If anyone can help out it would be greatly appreciated.

FYI the engine is a 4AGE 20V Blacktop.

Cheers, Jacob.

[knightrous]

There is no Diagnostic tool, you jumper certain pins in the diagnostic box to test various circuit or enable the error code mode that flashes the check engine light in a series of patterns to define an error code. You can find most of this information in the Big Green Book (BGB) for your car (or if it's a conversion, the car it came from).

[maj]

In a properly done conversion, you should be able to bridge the T1 and E1 connectors in that diagnostic plug, by using some stiff wire or even a paperclip if you have one handy.

Once this is done, the ECU goes into diagnostic mode, and when you turn the key into the ignition on position, you should get a number of flashing lights show up on your dash; this is if the check engine light was properly hooked up during the conversion, which it *should* be.

The number of flashes will indicate a code which represents the problem. Usually you might get something like 5x flashes with 1 sec pauses between, then you'll see a 1.5 second pause (it's noticeable that it's a longer pause), then another 2x flashes with a 1 sec pauses (5 flashes + 2 flashes = error 52). There could be multiple codes too but by the end of it there's one big long pause.

I don't have anything handy to give you a full list of the error codes, but if you google "4age 20v diagnostic" you find a lot of useful webpages, like this:
me2kimi.blogspot.com: How to diagnose toyota OBD1 error code

The pins you want to bridge on the diagnostic port will look like this:

[kingtube69]

Thanks for the info guys