Hi all,

2009 Continental GTC Speed.

All was well until yesterday when, 70 miles into a drive, the car bleeped and the (P) with a line through it appeared in the centre display and my parking brake stopped working. I tried turning the car off and on plus left it overnight but as soon as the ignition comes on, it bleeps and the error comed up. The parking brake button is also flashing. The car is driveable as it seems to have stopped working with the parking brake off.
I assume it is one or both of the parking brake motors or an electronic module.

I borrowed a friends VCDS and performed a scan and got the following for module 53 (parking brake)

Address 53: Parking Brake Labels: 3W0-907-801.clb
Part No SW: 3W0 907 801 E HW: 3W0 907 801 E
Component: EPB BC7H0270 HC7 0270
Coding: 0022413
Shop #: WSC 00083 790 00000
VCID: 3829381D2E4FA26A763-5160

1 Fault Found:
02434 - Supply Voltage for Control Module for Left Channel
006 - Short to Plus - MIL ON
Freeze Frame:
Fault Status: 11110000
Fault Priority: 2
Fault Frequency: 8
Reset counter: 125
Time Indication: 0

Freeze Frame:
Voltage: 13.35 V
Count: 110

Does that point to it being a motor (given that it says left channel) and if so, which is the left (my car is in the UK so right hand drive).

Anything else I need to check?

Thanks in advance.

Mike

 

"Short to Plus" really means a pin that was expected to be low voltage was not. In this case it's the ground to your left channel control module.

"Supply Voltage" indicates it's the input side, not the output side (the motor).

 

Sorry to be so ignorant.
If I understand your response correctly, you believe it to be the control module and not one (or both) of the motors or have I misunderstood?

Mike

 

I believe it's the ground to the control module. Probably at the connector or where the ground connects to the chassis, but potentially a broken wire in between.

 

@mmarksx19 ,
I get what @jeyjey is saying, meaning that the issue may be the power and or ground feeding the control module, but, I find that to most likely not to be the case, unless some other issues have occurred in the past in the area of the vehicle, meaning, to cause any damage to any of the wiring at the parking brake control module.

Now on the otherhand, a fault at either ("left") parking brake motor will sometimes give you the same fault code, as if the motor housing is cracked, it then allows water in, therefore creating a short scenario.


Johnny

 

Indeed, it should be noted that DTCs are at best clues, and sometimes not very good ones....

Still, I like my theory better....

 

Take a look st the casings. They are 100% prone to cracking.. You can swap them from side to side as well to prove wiring from the car. Normally once they crack water gets in and thd Hall sensors fail. As the crack worsens the gears move on the bearings and fail or thd belt comes off inside or stripps.
If a brake locks on you can wind the parking mechanism back with a torqe head . Then leave the epb plug off. You wont have a parking brake but it will at least let you drive the car.

 

It's a known issue of a loss of connectivity to the sensor.

To clear it for awhile, try cycling the emergency brake off and on, 5 to 10 times is succession.

It clears the fault in mine for a few months. I'll get it fixed proper next trip to the shop (there's descriptions of the issue and fix on the googlez).

 

Its 'stuck' in the off position luckily so doesnt stop me using the car - just can't apply the parking brake.
I've ordered 2 parking brake motors, if one has gone I would imagine the other isnt far behind.
If it doesn't fix it then I'll look into the control module.ecu.

As the parking brake isn't on - are there any special procedures or is it just a matter of remove the old motors and fit the new ones? Any coding or settings required?

 

No coding required . Y
Manually wind open the pads on both wheels.
You can then attach the motors and plugs. I use odis to cycle the pads using the change pad function. But i suppose you can just cycle the brajes using the centre console switch.
I bought cheep ones of ebay for audi A8 . They were only £40 ota each. But one had faiked already and the car usnt even off the axle stands yet. The company are ignoring my request for a refund..
So be carefull where you source tgem from. You get what you pay for.

 

Cracked Housing.... happened to me a while back here is the story...https://www.6speedonline.com/forums/...eak-fault.html