Keyless Starting System: Testing and Inspection

Access/Start Authorization, KESSY


When disconnecting and connecting the battery, always perform the work procedure as described in the repair information. Refer to => [ Battery, Disconnecting and Connecting ] Battery, Disconnecting and Connecting.

• Additional information:

Refer to the Owner's Manual.

DTC Recognition and Display

Access/start authorization is equipped with On Board Diagnostic (OBD) which assists troubleshooting. Refer to => [ Access/Start Authorization Antennae and Sensors, Checking ] Access/Start Authorization Antennae and Sensors, Checking.

General Description

The KESSY system (Keyless Entry Start Stop System) regulates keyless opening, locking and vehicle start-up.

Opening

The ID sensor in ignition key must be located within reception range of lock location (approximately 1.5 meters). The proximity sensor located on the inside of the door handle is activated whenever the handle is touched. This then speaks to the ID sensor inside the key and the door unlocks immediately if the identification is valid. Pulling the door handle opens the vehicle.

Starting

The ID sensor in ignition key must be located in the vehicle interior. The clutch pedal must pressed on manual transmission vehicles. If this is a DSG transmission vehicle, then the selector must be in the P position and the brake pedal must pushed down. Briefly push the ignition starter button. This speaks to the ID sensor in the key and if the identification is valid, the steering wheel unlocks and the vehicle can be started.

It is only possible to start the engine with the start button if a valid ignition key is inside the vehicle.

Locking

The ID sensor in ignition key must be located within reception range of lock location (approximately 1.5 meters). Touching the locking sensor on the outside of the door handle activates the sensor. This then speaks to the ID sensor inside the key and the vehicle unlocks if the identification is valid.

The access/start authorization control module (J518) controls all access/start functions. Refer to => [ Access/Start Authorization Control Module (J518) ] Description and Operation.