When servicing or replacing rear brake rotors or electronic parking brake linings on modern Porsches, the parking brake lining gap will have to be adjusted and calibrated. If replacing ONLY the rear brake pads, normally you do not need to perform this procedure.
Some Porsche technicians prefer to avoid this procedure unless absolutely necessary, as there have been cases where the calibration requires repetition to complete (takes excessive time) or the parking brake module fails during the adjustment and calibration.
You should always check if the parking brake holds the car / SUV as designed when engaged; before and after repairs or maintenance. If it does not hold, do not bypass the adjustment and calibration.
WARNING: Once you begin the parking brake commission procedure, you have to complete all steps. Otherwise fault codes will not clear and a warning light may be present.
Below are the five steps you will perform to complete the entire procedure.
Steps 1 & 2 of 5
We’ll demonstrate start and end lining change mode, steps 1 & 2 of 5 when adjusting electronic parking brake lining gap. We’ll be using the iSCAN SF and our Porsche enhanced software communicating on a diagnostics over internet protocol, also known as DoIP.
This portion of the procedure shows Starting and Ending Lining Change Mode. These steps are required when replacing the parts to prepare the brake system for the mechanical work to be performed.
Steps 3 of 5
This is step 3 of 5 required steps when replacing either the rear brake rotor or the parking brake shoes on modern Porsche cars or SUVs.
In step 3, the parking brake air gap will be measured and adjusted (if required).
After this parking brake adjustment, the parking brake still has to be ground in and calibrated.
Step 4 of 5
This is step 4 of 5 required steps when replacing either the rear brake rotor or the parking brake shoes on modern Porsche cars or SUVs.
In step 4, we will look at how to grind in the parking brake linings or shoes. This is only required if the rear brake rotors or parking brake shoes were changed.
Step 5 of 5
This is step 5 of 5 required steps when replacing either the rear brake rotor or the parking brake shoes on modern Porsche cars or SUVs.
In this final step, the electronic parking brake will be calibrated. Please check & clear any fault codes after calibration.