Anytime the Electric Throttle Control Actuator (Throttle Body) or ECU is disconnected from the wiring harness, the idle speed will need to be re-learned. This procedure can also resolve a high idle at park or in neutral of over 1500 RPM and a pulsating idle that goes high and drops low repeatedly. The idle for the Nissan Versa should be between 650-750 RPM at park or in neutral. The official procedure can be found here
; however, I found that this procedure is very time sensitive and it was much easier to perform it the following way.
* Stop Watch or Stop Watch App for Smartphone
1. Drive Versa for 10 minutes to warm up the engine and transmission.
2. Turn off Air Conditioning, Headlamps and Rear Window Defogger.
3. Put Versa in park, straighten out steering wheel (neutral position) and turn off vehicle.
* The following procedures are time sensitive and if messed up, must be started from the beginning. It may take a few tries to get it right.
1. Turn the ignition switch (key) to the off position and wait 10 seconds.
2. Turn the ignition switch (key) to the on position and start the stop watch at the same time. (The on position is the second click)
3. At 3 seconds on the stop watch, press the accelerator pedal fully to the floor and fully release it 5 times before the stop watch gets to 8 seconds. (Timing wise, all that matters is it gets done 5 times between 3 and 8 seconds on the stop watch)
4. At 15 seconds on the stop watch, press the accelerator pedal fully to the floor and hold it down.
5. At 35 seconds on the stop watch, fully release the accelerator pedal and then immediately start the engine.
6. At 60 seconds on the stop watch, rev up the engine 2-3 times and make sure each time the tachometer falls back down to 650-750 RPM.
7. Turn the ignition switch (key) to the off position - idle is now set.