Is there a way to check for engine fault codes with a volt meter?

[lancerevo]

Is there a way to check for engine fault codes with a volt meter because I don't have a check engine light in my dash?

[WmWatt]

Yes on my '89 but I think you need an analogue VOM with a needle to count the swings. I don't think a digital VOM will work.

[lancerevo]

I made a diy tester. http://www.youtube.com/watch?v=jQEb0MXLePY

[mechanicaldj]

or you could use:

http://www1.snapon.com/diagnostics/us/VERDICT

:p

[Grey Vw]

or you could use:

http://www1.snapon.com/diagnostics/us/VERDICT

:p

lol. That thing is worth like 10x as much as a Festiva

[lancerevo]

There's no need to. All you need is an analogue volt meter.

[lancerevo]

So. I wanted to experiment with the error codes so I tried disconnected the iat sensor & there was a code 10 error which is the iat sensor. Once the error starts, you should connect the iat sensor back on and disconnect the battery and press the horn or the brake pedal to remove any ecu current, if you don't it will not reset. I tried it myself. Anyway, I tried connecting a 20k resistor instead the iat sensor and no codes at all, even with a 50k resistor in series with the 20k = 70k no error codes at all. So the iat mod works very well. Also, it increase the responsiveness of the engine, also revs smoother and even gets better mpg's.

[MTec007]

So. I wanted to experiment with the error codes so I tried disconnected the iat sensor & there was a code 10 error which is the iat sensor. Once the error starts, you should connect the iat sensor back on and disconnect the battery and press the horn or the brake pedal to remove any ecu current, if you don't it will not reset. I tried it myself. Anyway, I tried connecting a 20k resistor instead the iat sensor and no codes at all, even with a 50k resistor in series with the 20k = 70k no error codes at all. So the iat mod works very well. Also, it increase the responsiveness of the engine, also revs smoother and even gets better mpg's.

iat, what is that? wondering if my 88 has one, its carbed.

[lancerevo]

carb engines don't need ecu so no iat sensor.