Error - LG LRE30451 Service

Door lock system error
Check the door locking motor (measure the resistance)
normal: approximately 2.6kΩ
abnormal: infinite or below 5 Ω
Check for loose connector (Front) (main PCB CN4)
CN4 CN4 CN4 CN4 CN4 CN4 CN4
CN4 CN4
CN4 CN4 CN4 CN4
CN4 CN4 CN4 CN4
CN4 CN4
CN4 CN4 CN4 CN4
CN4 CN4 CN4 CN4 CN4 CN4 CN4
Remove the main PCB (009A) harness
and pull the PCB (009A) forward from the PCB case
F-CODE FLOW CHART
F-2 error
No
Normal?
Yes
No
Normal?
Yes
Front
3
2
1
No
Normal?
Yes
Replace the door locking motor
7-3
Replace the micro switch
END
END
Reconnect
END