DTC Detection Logic
WARNING: This page is about a different car, the 2011 Infiniti EX35. However, it is still accessible from the selected car via links, so may be relevant.
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. |