Repair Procedures: Removal

Switch "OFF" the ignition and disconnect the negative (-) battery terminal.
Disconnect the TCM connectors (A).
Disconnect the ECM connectors (B).

Fig 1: Disconnecting TCM Connectors
Courtesy of KIA MOTORS AMERICA, INC.
Remove the ECM & TCM bracket (B) after loosening the mounting nuts (A).
ECM & TCM Bracket Mounting Nut:

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

Fig 2: Removing ECM & TCM Bracket Mounting Nuts
Courtesy of KIA MOTORS AMERICA, INC.
Remove the ECM (B) after loosening the mounting nuts (A) from the ECM & TCM bracket.

Fig 3: Removing ECM Mounting Nuts
Courtesy of KIA MOTORS AMERICA, INC.