Car broke down - ODB error codes 14 and 24

[pwpanas]

Originally Posted by yoshi123

Thanks, I'll try to check all the grounds. My mechanic says harnesses and such like just don't fail in Toyotas though. I have to work through

- coil packs test
- spark plugs
- ignitor test

As the car warmed up, then failed. Cooled down for 1h20mins then ran. I am considering something is getting hot and failing e.g.ignitor.

The TOMS ecu does a few things, delimits boost, delimits speed. Ignition timing advance (more responsive lower rpms). Boost seems to be set to 1.6bar on this one if you let it control the solenoid - my solenoid is controlled by Blitz boost.

If you run it, you'll need 99RON at worst, 100RON ideally.

No links but you could check the TOMS website.

Agreed - harnesses and such like just don't fail in BONE-STOCK Toyotas. However, yours isn't. As you might guess, the quality of work associated with aftermarket modifications varies widely, which is why that is the most significant variable in why your Supra is behaving so erratically...and thus our first candidate for troubleshooting.

Note: The coil pack test specified in the TSRM is pretty useless. Oem coilpacks get weak long before they fail, and the only way to test a weak coilpack is to swap it out*. However, there is one thing related to the coilpacks you can check for: The heat from the 2jz-gte often causes the plastic coilpack harness connectors to fail (the plastic breaks inside the connector), which can result in erratic ignition. New coilpack connectors are inexpensive and can be ordered from Toyota; they're pretty simple to install too.

In addition, the easiest way to test the ignitor is to swap it out with a used one from another Mkiv Supra Turbo.

If your Supra hasn't had the coolant changed regularly, I've seen oem temp sensors fail from corrosion...that could be related.

Re: The TOMs ECU - is it completely 'plug-and-play'? ...or does it need to be wired in (solder/crimping/etc.)?

Do you have a link to the Toms web site?

*Since oem coilpacks are consumeable - they really only last about 75,000 miles - purchasing a spare one for testing isn't a bad investment at all. If the problem ends up being the coilpacks and your mileage is >75K, just get five more coilpacks and swap them all.