Porshe 911 (997). Manual - part 268

To measure wheels without tyres, remove the wheel from the vehicle. → 440519 Removing and installing
wheel

2. Remove tyre from the alloy wheel. → 44  Mounting tyres for vehicles with and without tyre pressure

monitoring system (RDK)

3. Clamp the wheel on the balancing machine and measure at the points -a- .

997110, 997111, 997120, 997121, 997310, 997311, 997320, 997321, 997410, 997411, 997430, 997431,
997610, 997611, 997620, 997621

WARNUNG

Gefahr des Verlusts der Text-Bild-Zuordnung beim Ausdruck.

Aus technischen Gründen kann derzeit nicht ausgeschlossen werden, dass trotz
einwandfreier Darstellung auf dem Bildschirm beim Ausdruck der
Zusammenhang von Text und zugehörigem Bild verloren geht.

• 

Wird der Fehler nicht bemerkt, besteht die Gefahr, daß Arbeiten nicht korrekt
durchgeführt werden und es dadurch zu Personen- und Sachschäden kommt.

• 

→ Vergleichen Sie deshalb nach dem Druckvorgang unbedingt die Ausdrucke mit der
Bildschirmdarstellung. Korrigieren Sie die Ausdrucke im Fehlerfall so, daß der Inhalt der
Bildschirmdarstellung zutreffend wiedergegeben wird.

WARNING

Danger of losing text-figure correspondence when printing out.

For technical reasons, it can currently not be ruled out that the correspondence
between text and associated figure can be lost when it is printed out, even though
the display on the screen is correct.

• 

If the fault is not noticed, there is the danger that work will not be performed
correctly which can cause injury and damage.

• 

→ Therefore, always compare printouts with the screen display after printing them out. Correct
the printouts if they are faulty so that the content of the screen display matches that on the
printouts.

AVERTISSEMENT

Risque de perte de la correspondance texte-illustration lors de l'impression papier.

Pour des raisons techniques, il ne peut pas être exclu à l'heure actuelle que, même
en cas d'affichage correct à l'écran, la correspondance entre le texte et l'illustration
puisse être erronée sur l'impression papier.

• 

Diagnostic system: reading out fault memory and activating systems

Checking the radial and lateral runout

1229

Si l'erreur passe inaperçue, on court le risque d'exécuter certaines opérations de
manière incorrecte pouvant conduire à des dommages corporels et matériels.

• 

→ Comparez impérativement pour cette raison les impressions papier avec l'affichage à l'écran.
Corrigez-les en cas d'erreur de manière à reproduire correctement l'affichage à l'écran.

ATTENZIONE

Pericolo di perdita dell'abbinamento testo-immagine nella stampa.

Per motivi tecnici non è escluso che, nonostante la rappresentazione sullo schermo
risulti perfetta, durante la stampa venga persa la corrispondenza fra testo e
relativa immagine.

• 

Se tale difetto non viene rilevato vi è il pericolo che i lavori non siano eseguiti
correttamente; ciò può avere come conseguenza lesioni e danneggiamenti.

• 

→ Per questo motivo, dopo la stampa è assolutamente necessario confrontare le stampe con la
rappresentazione sullo schermo. In caso di errore si prega di correggere le stampe, così da
garantire la riproduzione esatta della rappresentazione sullo schermo.

ADVERTENCIA

Al imprimir se corre el riesgo de perder la correcta asignación de las figuras al texto.

Por motivos técnicos, por el momento no se puede descartar que, aun siendo
correcta la imagen que aparezca en la pantalla, al imprimir se pierda la
correlación entre el texto y la figura correspondiente.

• 

Si este error pasara desapercibido, existe el riesgo de que los trabajos no se
ejecuten de forma correcta y, por tanto, se produzcan daños personales y
materiales.

• 

→ Por ello le rogamos que tras el proceso de impresión compare siempre las copias impresas con
la imagen de la pantalla. En caso de error, corrija las copias impresas de forma que se
correspondan con el contenido de la imagen de la pantalla.

Diagnostic system: reading out fault memory and activating systems

Checking the radial and lateral runout

1230

- Removing wheel electronics
- Installing wheel electronics

Removing wheel electronics

General information on wheel electronics

The tyre pressure monitoring system (RDK) is designed to constantly monitor the tyre pressure during driving
and when stationary. One set of electronics -A- per tyre is mounted in the rim well base. These measure tyre
pressure and temperature at regular intervals and transfer the values to a central control unit via a
high-frequency route. The control unit evaluates the information and transfers the data to the instrument
cluster if required. In this way, the driver is warned and informed if the tyre pressure has to be corrected.
There are two versions of the wheel electronics -A- . The standard version, including normal transmission
power, is used in the 911 Carrera (997) (in the Cayenne, an amplified transmission power is deployed). These
transmit on a high frequency range of:

433 MHz or 315 MHz (special wheel electronics with 315 MHz have been developed for the Japanese
market).

• 

The following points can be used as distinguishing characteristics:

The labelling, 433 MHz or 315 MHz

• 

The part number

• 

Without 8 stars (the illustration shows 8 stars, 4 each to the left and right of the slot, wheel electronics
with amplified transmission power from the Cayenne)

• 

Special 315 MHz wheel electronics for Japan: identification with 14 oblique strokes (slashes)

• 

And/or the colour (black 433 MHz/grey 315 MHz)

• 

1231

-A-

- Wheel electronics

-B-

- Valve complete (No. 2 to No. 7)

-1-

- Self-locking (Torx) fastening screw

-2-

- Valve cap (plastic)

-3-

- Valve insert

-4-

- Union nut

-5-

- Washer chamfered on both sides

-6-

- Bead seat sealing ring

-7-

- Valve

Removing wheel electronics

Note

For vehicles with a tyre pressure monitoring system, the valve and wheel electronics are only
replaced in exceptional cases! The following points can make replacement necessary!

• 

Diagnostic system: reading out fault memory and activating systems

General information on wheel electronics

1232