Almera Tino idle relearn?

W

Wongsky

I've recently bought a 2004 Almera Tino, with the 1.8 QG18DE engine.

Doing a few bits and bobs, and I normally do things like clean out the throttle body with a newly acquired car.

Before I did so, idle was very smooth, and low. I've given it a good clean out, and connected everything up again - don't think I've damaged any hoses or anything like that, but I've found the idle is very slightly different.

Still not high enough to warrant true concern, but is a little higher when the engine is warm than I would have thought, and what it was doing before. It's still firmly under 1k revs when warm, but maybe before it was around 850, now would seem about 950 (that's really finger in the air guesses, I haven't yet plugged my ELM dongle in to properly check.

Is there some procedure for relearning idle trim values - and if so does it need specialised kit, or will it just settle down after a bit?
 
sri_alan said:
Is the butteryfly plate in the throttle body closed properly?
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Well I took off the throttle body and cleaned it throoughly. It's an ETM type body - ie not a manual cable linkage.

I did work the butterfly plate open a couple of times to clean it's edges and the bits they cover. I did notice, though, that it didn't completely close, there was a marginal gap, although a little bit of movement would probably close it fully.

That position didn't change in terms of it being more of a gap through me cleaning it, though.
 
happyharrysco1 said:
Iirc there is an idle reset procedure in the service manual

....phone....
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Think I've got the service manual - the group of pdfs with an index document?

I've found this procedure (essentially, a load of pre-reqs, then disconnecting the TPS plug, briefly), or older procedures, via google, involving the "pedal dance" - and I think they're all for slightly older implementations. The one from the service manual talks about a TPS plug, and also talks about an IACV - on my 2004 1.8 Tino, I don't think it has an IACV, nor a plug just for the TPS - I think it just has one multi-plug that attaches to the ETM.

When you try and follow the service manual, on mine, and unplug the ETM, it just brings on the check engine light, and the idle doesn't recover - it stays high after you've unplugged the ETM briefly. Fortunately I've got a code reader, so I could reset the check engine light afterwards.

Anybody know if there any idle speed adjustment / relearning things for ETM cars - or whether you're not supposed to interfere with the butterfly plate when the throttle module is off the car?
 
^ this.

The idle air volume relearn procedure can take a bit of time to get right.

You will need some kind of stop watch.
 
Thanks for the documents, coincidentally I found a service manual on another Nissan forum, for a 2004 Sentra which I believe uses the same engine, which has the exact same procedure - although the docs you attached are much more convenient as they're straight to the bits I need. I followed this to the letter, and the engine light responded, so yay!

The idle speed does seem to have settled down lower, back to where it used to be. There still seems a little difference in the idle hanging very briefly, as you declutch and slow to a stop, but it only seems a marginal thing, and soon drops to where it should be.

Thank you all for your help!
 
I have an automatic Almera 2002, 1.8 se.

I had to replace the idle air control valve and solder in a new chip which burnt-out in the ecu.

My car stalls if I let go of the gas peddle too quickly. I have tried to use the re-learn method described here, but had no luck. The engine light does not flash when doing the procedure as described in the pdf. I assume the little engine shaped sign on the dash is the mil I should be looking at to see the flashing.

Is the procedure different for my car?

Cheers,
Neil
 
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