My daughter has a 2001 Maxima GLE with the proverbial blown IAC and ECU problem. I have ordered and received both the IAC and ECU with matching numbers. However, I know that I will have to have the new ECU programmed to my key to make the car start. Is it possible to drive the car to the dealership with the old ECU hooked up along with the old and bad IAC. Then unhook the old ECU and connect the new ECU and have them re-key it? I am worried that the bad IAC will blow my new ECU if they have to turn on the car to do this procedure. Any thoughts on this would be strongly appreciated.

 

That's what I would do. Assuming the car is driveable, I would drive it to the dealership with old parts in place, and only replace both parts there, at the same time. It will cost you a bit more (since they will have to swap the parts for you), but it's worth it because of the reduced risk.

 

Thanks, but doing the work is not the problem. Just don't want to ruin new parts.

 

Yes, that should be the way for you to do it; I took it to the shop that way and had it done there

Not always those are just the 2 pieces that are bad, so be careful, so make sure to get warranty for work done
If car is automatic - disconnect the electric mount prior to connecting new ECU and IACV

 

OK. What is the mounts that must be disconnected and where are they located?

 

Electric mount

 

If you have an automatic, then either one of the two electronic mounts (Front and Rear) can fry the ECU when it fails (just like a failed IACV can).

This does not have to be done before you disconnect the IACV; but you need to eliminate both potential causes - the IACV and the e-mounts - if you really want to eliminate the threat.

The mounts are connected via brown connectors (3 wires), at least on my 2000 SE. The FSM shows their location: both are on the driver's side; the front one is just behind the fan, and the rear one is very close to, and just behind, the AT fluid dipstick.

 

You can put the new IACV on the car with a blown ECU. The blown ECU won't hurt the new IACV.

As far as the motor mounts go, you should unplug the connector when the engine is revving over 1,000 rpm so that the hydraulic chamber in the motor mount will be full.

Front motor mount connector:



Rear motor mount connector: