Confused by a code 1435 even after new sensor!

[rennbod]

I have a 2006 Cayenne V6 that is sending me crazy!

I recently started the Cayenne and immediately the dashboard warned of an ABS fault, then the ABS light came on, followed by the dashboard complaining of an air suspension fault, which then went away..

Plugged my Durametric into the car and returned a fault code of 1435 under ABS which is a "Brake pressure switch" fault... So I went through the troubleshooting proceedure, tested the wiring etc, everything checked out as ok. So I changed the pressure switch and bled the brakes. (air suspension complains that 1316 - "read out ABS/PSM fault memory" which I guess is the fact that the ABS has the 1435 fault code!)

Started the engine, same sequence of faults, same faults, try to clear the fault codes and they come right back immediately...

I have searched the archives, searched google, re-read the manuals a million times and am now at a loss and really do not want to be beaten by this one! Please HELP!

[Loren]

:welcome:

Fault code 1435 Pressure sensor (brakes]

Possible cause of fault

- Signal from PSM control module does not correspond to expected signal (please read out fault memory)

- Signal from PSM control module does not correspond to expected signal (short circuit to ground)

Note!

If there is no incoming signal via the CAN drive using several controlmodules, the CAN drive must be checked for open or short circuits.

Refer to 'Checking instructions/CAN data bus'.

For further troubleshooting, please follow the diagnosis instructions for the PSM control module (Rep. Gr. 45).

From PSM section:

Possible cause of fault

- The pressure sensor was not calibrated or was not calibrated correctly (no or incorrect basic setting/adaptation).

- Actual value of pressure sensor is evaluated as implausible (implausible signal)

- Short circuit to ground (electrical fault in electric circuit)

- Short circuit to B+ (electrical fault in electric circuit)

- Open circuit in circuit to control module (electrical fault in electric circuit)

Note!

- Calibration completed successfully, or checked and found to be OK.

- During calibration, the flashing frequency of the ABS warning light increases to 1.9 Hz. The brake warning light flashes with a lower frequency (1.1 Hz).

- Visual inspection: In the next troubleshooting section, please check first that the affected 'pins' on the PSM control module plug connection and the pins on the pressure sensor plug connection are neither damaged nor corroded. The wiring of the affected components must a/so be checked for external damage.

Repair damaged or corroded pins if possible, otherwise rep/ace affected pins. Repair or replace damaged wire.

See if that info helps...