Parking brake help

[snapdragon]

Originally Posted by PsYcHe

Check the connector on the top too.. Mine did that and it was just a little loose and some crap had gotten in during the winter, just needed cleaned up and reseated.

Mine too, last February. The dealership had replaced the connector/cable under warranty ~2 years before and made a mess of it and was not watertight.

[a8starr]

So my parking brake decided to not release tonight. Whilst idling the engine is still able to pull the car forward but warning lights flashing. The parking brake motor is making a sound and when flicking upwards it locks everything tight. Flicking down seems to half release the PB and car can move forward at idle but it feels like something is still grabbing the discs.

Questions

1. Does the rear parking brake lock up both rear wheels or just one?

2. Could water ingress or dirt in the connections cause weak motor function and therefore not disengage the callipers completely?

3. Are my callipers shot?

4. I have VCDS (bit of a newbie still) would this help me out at all?

I have a jack and axel stands in the garage also.

Any help would me much appreciated as I am not able to drive anywhere.

[snapdragon]

Yes, it operates independantly on bothe rear wheels.
Make sure the noise comes from both sides, if not check the quiet side.
If both make a noise, I would also check for sticking piston a few of us have had that. Mine was dirty and corroded due to torn dust boot, but just needed a clean up and a new seal kit.

[a8starr]

Thanks for the reply snapdragon.

Here are my fault codes. First scan in 53. Parking brake revealed 5 faults. Cleared the faults then on 1 appeared.

Friday,14,March,2014,21:56:36:41609
VCDS Version: Release 12.12.2 (x64)

Address 53: Parking Brake Labels: 4E0-910-801.clb
Control Module Part Number: 4E0 910 801 A HW: 4E0 907 801
Component and/or Version: EPB AV1C1010 H01 1010
Software Coding: 0000221
Work Shop Code: WSC 02313 785 00200
VCID: 1D3108
5 Faults Found:

02432 - Supply Voltage for Left Parking Brake Motor (V282)
011 - Open Circuit - Intermittent
Freeze Frame:
Fault Status: 00111011
Fault Priority: 2
Fault Frequency: 1
Reset counter: 197
Mileage: 138544 km
Time Indication: 0
Date: 2014.02.24
Time: 17:42:05

Freeze Frame:
Voltage: 11.90 V
Count: 92

02429 - Right Parking Brake Motor (V283) Clamping Force Not Reached
000 - - - Intermittent
Freeze Frame:
Fault Status: 00110000
Fault Priority: 4
Fault Frequency: 1
Reset counter: 193
Mileage: 138312 km
Time Indication: 0
Date: 2014.02.22
Time: 23:41:47

Freeze Frame:
Voltage: 12.63 V
Count: 15

02431 - Right Parking Brake Motor (V283) Resistance to Movement
003 - Mechanical Failure - Intermittent
Freeze Frame:
Fault Status: 00110011
Fault Priority: 3
Fault Frequency: 33
Reset counter: 228
Mileage: 138264 km
Time Indication: 0
Date: 2014.02.22
Time: 12:19:46

Freeze Frame:
Voltage: 13.66 V
Count: 19

02433 - Supply Voltage for Right Parking Brake Motor (V283)
011 - Open Circuit - Intermittent
Freeze Frame:
Fault Status: 00111011
Fault Priority: 2
Fault Frequency: 2
Reset counter: 197
Mileage: 138152 km
Time Indication: 0
Date: 2014.02.18
Time: 18:02:23

Freeze Frame:
Voltage: 11.80 V
Count: 93

02433 - Supply Voltage for Right Parking Brake Motor (V283)
012 - Electrical Fault in Circuit - MIL ON
Freeze Frame:
Fault Status: 11111100
Fault Priority: 1
Fault Frequency: 15
Reset counter: 188
Mileage: 137816 km
Time Indication: 0
Date: 2014.02.15
Time: 09:58:50

Freeze Frame:
Voltage: 13.04 V
Count: 87



scan 2 after first codes cleared

Friday,14,March,2014,21:59:09:41609
VCDS Version: Release 12.12.2 (x64)

Address 53: Parking Brake Labels: 4E0-910-801.clb
Control Module Part Number: 4E0 910 801 A HW: 4E0 907 801
Component and/or Version: EPB AV1C1010 H01 1010
Software Coding: 0000221
Work Shop Code: WSC 02313 785 00200
VCID: 1D310
1 Fault Found:

02433 - Supply Voltage for Right Parking Brake Motor (V283)
012 - Electrical Fault in Circuit - MIL ON
Freeze Frame:
Fault Status: 11111100
Fault Priority: 1
Fault Frequency: 16
Reset counter: 188
Mileage: 137816 km
Time Indication: 0
Date: 2014.02.15
Time: 09:58:50

Freeze Frame:
Voltage: 13.04 V
Count: 87

[PsYcHe]

Looks like the right EPB motor isn't happy. Not sure how servicable they are, but might be something easy. Make sure the connectors are on properly and clean.

[a8starr]

Had the AA round to help.

Turns out the rear driver side calliper is sticking a bit.
We discovered this by jacking up both rear wheels and spinning them.
Its sticking less than last night because charging the battery helped and we were able to roll the car by foot.. Took it for a spin and a bit of heat still got generated.

So I do plan to check the connections.

Is it OK just to disconnect the PB cable and cable to calliper in order to clean them?

[PsYcHe]

Yup.. its ok to do that. Doing anything to remove the caliper needs you to let it know in vcds.