LG LSC27931SB Service Manual page 28

1-7. Option designation circuit (model separation function)
The citrcuit configuration is Op1 open and Op2 in short, these circuits are preset at the factory and can not be altered.
Separation
OP1
OP2
1-8. Stepping motor operation circuit
Connection Status
Short
Open
Short
Open
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Application Standard
Twisting Icemaker
Heating Icemaker
Dispenser
Dispenser Less
CONNECTOR 9
STEPPING MOTOR
PIN 9, 10, 11, 12
RD, YL, BK, BL