Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSVOLKSWAGEN2008JETTA GLI (1K2) L4-2.0L TURBO (BPY)REPAIR AND DIAGNOSISSTARTING AND CHARGINGSTARTING SYSTEMKEYLESS STARTING SYSTEMDESCRIPTION AND OPERATIONACCESS/START AUTHORIZATIONACCESS/START AUTHORIZATION, KESSY
2008 Volkswagen Jetta GLI (1K2) L4-2.0L Turbo (BPY)
Access/Start Authorization, KESSY
2008 Volkswagen Jetta GLI (1K2) L4-2.0L Turbo (BPY)SECTION Access/Start Authorization, KESSY
Access/Start Authorization, KESSY
When disconnecting and connecting the Battery, the procedure must be followed as described in the repair information. Refer to=> [ Battery, Disconnecting and Connecting ] Battery, Disconnecting and Connecting.
• Additional information:
Refer to the Owner's Manual.
Refer to.
DTC Recognition and Display
The access/start authorization system has OBD.
Use the Vehicle Diagnosis, Testing and Information System (VAS 5051B) under "Guided Fault Finding".
General Information
The KESSY Access system regulates keyless opening, locking and starting of the vehicle.
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. On vehicles with an automatic transmission and DSG, the selector lever must be in "P"and the brake pedal must be pressed. Press the start system button (E378) briefly. 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 system button (E378) when a valid ID sensor is located in the vehicle interior.
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.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.