Brake Noise (Scraping/Chipping)
Information
The brake noises covered in this section (scraping/chipping) usually occur only on PCCB brake systems.
Information
The noise complaint must be documented as follows:
Recreate the driving situation in which the noise occurs and repeat this several times if possible. Ensure that the environment is as quiet as possible to do this.
- At speeds < 10 km/h (6 mph) - Record the noise from outside and capture the brake that is causing the noise in the picture
- At speeds > 10 km/h (6 mph) - Record the noise from inside and capture the speedometer in the picture
File name of the video: Process line ID_Vehicle_Noise_DDMMYYYY
e.g.: 2200123456_911 Carrera_Scraping_20200826
Equipment:
PCCB front brake disc
- Macan (95B) - M-no. 1LY
- 911 (992) - M-no. 1LQ, 1LX, 1LZ
- Panamera (971) - M-no. 1LQ, 1LX
- Boxster/718 Cayman (982) - M-no. 450
- Taycan (Y1A/Y1B/Y1C) - M-no. 1LQ, 1LX
- Cayenne (9YA/9YB) - M-no. 1LX, 1ZV, 1ZW
Work Procedure:
Information
Scraping or swapping generally occurs in warm brakes, cold and wet weather conditions in combination with "glazed" brake pad friction surfaces.
Glazing of the brake pad friction surfaces can be caused by a so-called "reduced load" on the brake system.
A "reduced load" occurs when the brake system is generally operated rather rarely and also only slightly.
This behavior can be promoted by recuperation on BEV and PHEV vehicles.
If the noise complained about cannot be assigned to scraping or chipping, continue with > Further braking noises .
1 Battery Electric Vehicle (BEV)
2 Plug-in Hybrid Electric Vehicle (PHEV)
Scraping/chipping
Create vehicle analysis log (VAL), reproduce the noise and record it on video.
Can the scraping/chipping be confirmed and is this the noise the customer complained about?
| Yes | No |
|---|---|
| See section "Procedure with confirmed noise". | Continue as required for the detected noise, using the sound file to classify it. See 3D Information. |
Procedure with confirmed noise
- Make meaningful documentation of the noise with sound and video material in PQIS.
- Check whether a suitable TI/SY is available for the reported noise in PCSS and work through it.
- If no remedial action is available and there is no technical defect in the brake system, explain the technical situation to customers with the help of the Driver's Manual of the vehicle (section: Brakes - Footbrake - Brake pads and brake discs).
- If necessary, contact Technical Support in order to agree on how to proceed.
- Replace brake pads on the front axle.
For work procedure, see:
- In a personal discussion, make the customer aware of the issue of "reduced load" and explain the special features of a ceramic brake system (PCCB).
Information
Please note that for the fault type "Brake pad rigging", invoicing is not possible under the New Vehicle or Porsche Approved Warranty.
3D Information:
For better classification of the noises, use the sound file/video under the following link.