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Unusual intermittent park brake/EPB fault. Canbus?
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scrappyloz
 


Member Since: 27 Dec 2018
Location: Hereford
Posts: 8

United Kingdom 
Unusual intermittent park brake/EPB fault. Canbus?

Hi im wondering if someone can help me with a very unusual fault im having with my discovery 3.

I know my way around the discovery 3 very well but this is a fault i have never come across before.

Every time i start my discovery 3 after it has been sat for a while the red and yellow P lights are on. The only way to release it is to start the car (have to start cannot just turn ignition on) then turn the car off and then turn the ignition on whilst pushing the park button down.
The parking brake will then release and then works perfectly. with no further fault.

I can also turn the car off and come back to the car in a short while and the park brake will still be fine.
If i leave the car for around 30 minutes or longer the fault reappears.

I code read the modules and the faults i have coming back seem to refer to a canbus fault. I did have water ingress to the vehicle from bad sunroof drains, which i have now fixed and also dried the entire car but the loom was wet from the water ingress. Are there splices for the canbus in the loom the runs down the door sills

PARK BRAKE MODULE
C1A00-00 CONTROL MODULE
U0101-87 LOST COMMUNICATION WITH VEHICLE DYNAMICS MODULE
U0100-87 LOST COMMUNICATION WITH ECM/POWER CONTROL MODULE
U0155-87 LOST COMMUNICATION WITH INSTRUMENT CLUSTER MODULE
U0122-87 LOST COMMUNICATION WITH VEHICLE DYNAMICS CONTROL MODULE

INSTRUMENT CLUSTER
U0001-88 HIGH SPEED CAN COMMUNTICATION BUS
U0010-88 LOW SPEED CAN COMMUNICATION BUS
U0159-87 LOST COMMUNICATION WITH PARKING ASSIST MODULE

TRANSMISSION
U0155-87 LOST COMMUNICATION WITH INSTRUMENT CLUSTER MODULE
U0128-87 LOST COMMUNICATION WITH PARK BRAKE MODULE

ECM/ECU
U0128-87 LOST COMMUNICATION WITH PARK BRAKE MODULE
  
Post #201282927th Dec 2018 10:25 am
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scrappyloz
 


Member Since: 27 Dec 2018
Location: Hereford
Posts: 8

United Kingdom 

I have also checked the 3 connectors behind the passenger rear wheel and they are all good with no wiring faults or corrosion
  
Post #201314128th Dec 2018 2:13 pm
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scrappyloz
 


Member Since: 27 Dec 2018
Location: Hereford
Posts: 8

United Kingdom 

To close this thread it turned out the park brake module itself was faulty. It was a fault that only i seem to have experienced.
  
Post #214854023rd May 2020 9:19 pm
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Globetrotter448
 


Member Since: 21 Mar 2017
Location: Londonderry NSW
Posts: 1771

Australia 2007 Discovery 3 4.0 V6 Petrol SE Auto Java BlackDiscovery 3

At least it fixed - well done
  
Post #214860524th May 2020 7:46 am
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