Battery Tray

Remove the battery.
(Refer to Engine Electrical System - "BATTERY ")
Disconnect the ECM Connector (A).
Remove the mounting bolts and nut, and then remove the ECM bracket assembly (B).
ECM bracket mounting bolts/nut:

9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb.ft)

Fig 1: Locating ECM Bracket Assembly And ECM Connector With Mounting Bolts Or Nut
Courtesy of KIA MOTORS AMERICA, INC.
Remove the battery tray (A) after loosening the mounting bolts.

Fig 2: Locating Battery Tray With Mounting Bolts

G12161143

Courtesy of KIA MOTORS AMERICA, INC.