Preparatory Work

NOTE: Fault entry in the fault memory and control unit programming aborted due to low voltage.

Increased current draw during diagnosis or control unit programming can cause a drop in voltage, which can result in one or more fault entries and the abnormal termination of the programming process.
1. Before starting control unit programming, connect a battery charger or power supply, suitable for AGM type batteries, recommended current rating of 90A fixed voltage 13.5V to 14.5V.

NOTE: Control unit programming will be aborted if the Internet connection is unstable.

An unstable Internet connection can interrupt communication between PIWIS Tester and the vehicle communication module (VCI). As a result, control unit programming may be aborted.
1. During control unit programming, always connect PIWIS Tester to the vehicle communication module (VCI) via the USB cable.

NOTE: Control unit programming will be aborted if the vehicle key is not recognized

If the vehicle key is not recognized in vehicles with Porsche Entry & Drive, programming cannot be started or will be interrupted.
1. Switch on the ignition using the original vehicle key. To do this, replace the original vehicle key in the ignition lock with the plastic key fob if it was previously removed at the start of this procedure.

Work Procedure: