Power Door Locks: Troubleshooting

Lock function works but unlock function does not work. --> Since door unlock relay is fail, replace the door unlock relay.
Unlock function works but lock function does not work. --> Since door lock relay is fail, replace the door lock relay.
When passenger side knob is controlled, all doors locks, but when driver side knob is controlled, all doors do not lock.

Fig 1: Power Lock Inoperative Guide
Courtesy of KIA MOTORS AMERICA, INC.
When passenger side knob is controlled. All doors lock. But when the driver side knob is controlled, all doors do not lock.

Fig 2: Power Lock Inoperative Guide
Courtesy of KIA MOTORS AMERICA, INC.
Both sides do not interlock either.

Fig 3: Power Lock Inoperative Guide
Courtesy of KIA MOTORS AMERICA, INC.