RDK Possible causes if a fault is indicated

Fault display A =

[TIREPRESSUREi

Natural pressure loss approx. 0.2 bar/month

Stop car, switch off ignition

Increase tire pressure at indicated wheel by 0.3 bar. Increase pressure at wheel on opposite side of same axle to the same pressure. Or:

Adjust tire pressures exactly with 9288 System-Tester (to 0.3 bar above the pressure-sensing switch trigger value).

= Cause in wheel area

Tire/wheel damage Display reappears at frequent intervals

Leaking wheel rim or tire valve; slow puncture in tire, damaged sealing ring at pressure-sensing valve.

Fit the temporary spare wheel. Take car to Porsche dealer tire repair as soon as possible.

Perform brief RDK test.

As soon as car starts to move Although tire pressure is correct

Pressure sensing switch (DS) and HF sensor are misaligned, or gap between them Is too great. DS is damaged or wheel not fitted with DS.

Have the car put right by a Porsche dealer

Perform brief RDK test.

Only at fairly high speed Caused by centrifugal force

Stop the car and switch off "the ignition

Raise tire pressure at indicated wheel by 0.3 bar. Raise pressure at wheel on opposite side of same axle to the same value. Or:

Adust tire pressures accurately with the 9288 System Tester (to 0.3 bar above the pressure-sensing switch trigger value).

Fault display C =

TIREPRESSURE

iCONTROL OFF

= Cause in RDK system to

3 ffl 3

Fault in system

Tire pressures no longer monitored

Take car to a Porsche dealer; have falut localized with System Tester and put right.

I Perform brief RDK test each time a I wheel or tire is fitted (Page 44 - 28)

CO TO 00

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

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