Had the coolant leak into the throttle body causing it to fry the ecm. Replaced throttle body, repaired ecm and replaced to blown eccs fuse. Do I need to perform the idle air volume relearn on this vehicle, idle is around 1200. I haven't taken it out to drive yet because it has a bad starter and i have to hit the solenoid to get it to start. It also has crankshaft codes. (vehicle is 2003 qx4 179,000 miles)

calr wrote: ↑

Thu Dec 31, 2020 7:26 am

Do I need to perform the idle air volume relearn on this vehicle, ...

Yes you do but first you should check and adjust the throttle position switch closed position and reset the throttle position sensor idle position memory. Refer to pages EC-121 to EC-123 of the FSM to this this. https://www.nicoclub.com/service-manual ... 3%2FEC.pdf
Refer to pages EC-69 to EC-70 to perform the idle air volume learning next.
However, you may have an issue successfully getting this done given the existing issues with that crankshaft code. Additionally, the engine and the transmission both have to be warmed up before performing the relearn procedure. Therefore, you will have to drive it around for at least 10 minutes to get the transmission warm enough. You may have to fix your starter before you can do any of this.

Yes i am planning on getting the starter replcaed and the crankshaft position sensor replaced before I perform the procedure. Thank you!

This older thread might help.
how-to-ecu-relearning-procedures-t445702.html