Test Point 5

DTC 15

Control Unit Defective

Before replacing the control unit, check whether:

- There is any electrical interference from the ignition voltage (for example, if the spark plug caps are not correctly attached).

- There are any differences in potential caused by contact resistance (missing or poor ground connections).

Important: A poor ground connection may occur not only at the affected components but also at other important grounding points.





- Ground contact is present at control unit plug PINs 3, 52 and 37. These wires are connected to ground point IV or V (at the steering console in the case of left-hand drive vehicles, over the central electrical system in the case of right-hand drive vehicles).

Important: When replacing the PSD/ABS control unit, make sure that it is not confused with the PDAS/ABS control unit from the 911 Carrera 4 (964).