What does Proximity Signal (Proximity Pilot / PP) mean?

Explanation

The proximity signal, or Proximity Pilot (PP), runs through a separate pin in the charging connector. It has two functions: detecting that a cable is physically plugged in, and communicating the cable's current capacity to the car. Different cables can handle different amperages (13A, 20A, 32A), and the proximity signal tells the car which cable is connected so it does not draw more current than the cable is rated for.

The proximity signal also triggers the car to lock the connector in place. Once the car detects the proximity signal, it engages a locking mechanism that prevents the cable from being pulled out during charging. To release the cable, you typically need to stop the session from the app or charger screen first.

If the proximity signal is not detected, the car will not start charging even if the pilot signal is fine. A loose connection, a worn connector, or dirt in the port can prevent proper proximity detection. Cleaning the connector pins and ensuring a firm plug-in usually resolves this.

For detailed documentation, see CharIN e.V.

Where you'll see this

• On the charger screen

Common confusion

Pilot signal and proximity signal are two separate signals in the charging connector, each with a different job. Pilot handles communication and power negotiation. Proximity handles physical connection detection and cable rating.

Example

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