Basic Instructions And Procedure For Control Unit Programming

WARNING: Electrically moved side windows and rear spoiler

Danger of limbs being trapped or severed
Risk of damage to components
1. → Do not reach into the danger area.
2. → Keep third parties away from the danger area.
3. → Do not move components or tools into the danger area.
4. → Retract roll-up sun blinds on the rear side windows before starting programming or coding.

NOTIFICATION

Fault entry in the fault memory and control unit programming aborted due to undervoltage.

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 commencing work, connect a suitable battery charger with a charging current of at least 90 A to the jump-start terminals in the engine compartment.

NOTIFICATION

Completely flat vehicle battery

The break in communication in the vehicle system during programming causes safety-relevant functions, e.g. driving light and brake light, to be switched on automatically. This results in an increased current draw, which will run down the vehicle battery.
1. → Before starting control unit programming, connect a suitable battery charger with a current rating of at least 90 A to the vehicle.

NOTIFICATION

Control unit programming will be aborted if the WLAN connection is unstable.

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

NOTIFICATION

Control unit programming will be aborted if the driver's key is not recognised

If the driver's key is not recognised in the vehicle, programming cannot be started or will be Interrupted.
1. → Place the driver's key with the back facing down into the front left storage compartment in the centre console to guarantee a continuous radio link between the vehicle and the driver's key.

Information

There are basically two different ways of carrying out control unit programming:

Using the "Programming" menu for the relevant control unit (e.g. for the DME and PDK control units).

Via the "Campaign" function in the additional menu of the PIWIS tester by entering a specific programming code.
Using the "Customer service sales round panel" function in the PIWIS Tester.

The type of control unit programming to be used is described in the relevant Service Information or in the relevant Technical Information.