GF27.10-P-3028AHL Key-P Function

GF27.10-P-3028AHL Key-P Function
- TRANSMISSION 722.9 (except 722.930 /931) in MODEL 212

Key-P function requirements, general

^ Circuit 15 ON
^ Brake pedal operated
^ Vehicle speed greater than 8 km/h

Key-P, general

The designation Key-P comprises all the functions which in addition to the parking brake serve to secure the vehicle to prevent it from rolling away unintentionally

Key-P function sequence

The function sequence is described in the following steps:
^ Park pawl function sequence
^ Ignition-lock lock function sequence
^ Function sequence for gear range "P" lock
^ Emergency-P function sequence (see document, Emergency-P function)

Function sequence of park pawl (except code (889) Keyless Go)

The park pawl only permits shifting out of selector lever position "P" by the DIRECT SELECT lever (S16/13) when the transmitter key (A8/1) is in the "circuit 15 ON" position and the brake pedal is operated.

In order to ensure that after parking the vehicle the selector lever is shifted into selector lever position "P", the transmitter key can only be removed from the ignition lock control unit in this position (N73).

The vehicle is secured mechanically by blocking the park pawl gear in the transmission.

With code (889) Keyless Go

On vehicles with Keyless Go, selector lever position "P" is engaged when the driver door is opened after the vehicle is parked.

Ignition-lock lock function sequence

The electronic ignition lock manually locks the transmitter key at a vehicle speed greater than 8 km/h.

It prevents the transmitter key from being removed because automatic engagement of selector lever position "P" cannot be performed by the intelligent servo module for DIRECT SELECT (A80).

The transmitter key can be removed as long as the vehicle speed remains below the speed threshold and selector lever position "P" or "N" is automatically engaged by the intelligent servo module.

Gear range "P" lock

No gear shift from gear range "P" when the following conditions are fulfilled:
- No power supply from intelligent servo module
- No enable from drive authorization system
- Brake pedal not actuated