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Infiniti
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2012
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EX35 Base, AWD
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Repair and Diagnosis
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Transmission
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Transfer Case
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DTC/Circuit Diagnosis
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DTC P1809: Transfer Control Unit
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DTC Logic
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DTC Detection Logic
DTC Detection Logic
DTC
Display item
Malfunction detected condition
Possible cause
P1809
CONTROL UNIT 4
Malfunction has occurred inside AWD control unit.
AD converter system of transfer control unit is malfunctioning.