After checking the delivery of energy to the system you should give idle learning or re -enanza from idle, disconnect your battery for approx 10 minutes, then connect it again and put all the electrical elements to work, for example, light the lights, the radio air conditioning and the most important thing of the entire emergency brake, you must leave it in the position of the gear. 15 minutes of leaving it so turn it off and turn it on, with this you have the calibration of idle mnima.
I also recommend that you do a cleaning of the IAC valve before teaching it.
Good luck with your coic we are in contact.