2002- Altima 3.5L - high idle speed

Discussions related to Nissan DataScan II (NDSII) Windows PC software.
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Tom
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Joined: 09 Dec 2011, 19:17

Re: 2002- Altima 3.5L - high idle speed

Post by Tom »

So you have tried all the suggestions in the service manual and everything checks out? Did your Nissan mechanic friend have any suggestions?

How high is your idle?
What are your fuel trims: Short Fuel Trim, Long Fuel Trim, A/F Alpha, A/F Alpha stored? You should have some of them but probably not all.

Eagerly waiting for your next reply
Tom
Site Admin
Posts: 656
Joined: 09 Dec 2011, 19:17

Re: 2002- Altima 3.5L - high idle speed

Post by Tom »

So the mechanic was able to lower the idle RPM without performing the IAVL?
Tom
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Posts: 656
Joined: 09 Dec 2011, 19:17

Re: 2002- Altima 3.5L - high idle speed

Post by Tom »

The NDSII software is counting while the ECU is returning "ECU busy" message. There is no other information provided by the ECU. After counting to 5000 it just gives up.

It would be good if the ECU provided some more information about why it can not complete the IAVL but this unfortunately is not the case. That's why its important to follow all the prerequisites and fault finding steps in the service manual.

So the mechanic could not complete the IAVL procedure with the "smog machine" until disconnecting 3 injectors?
And you only tried to disconnect 2 injectors with the NDSII software right?
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