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It's a fairly involved process, curious as to what it will cost you. In my case it was going to be quite significant, more than what it was worth at the time. However now that I'm removing the fuel tank and installing a custom sway bar, it might be quite easy to get to.
The main dealer advised the Hall effect sensor on older models have failed and suggested replacement of the actuator. Based on your previous posts I assumed that was where you were going.
Not all failures can be resolved with diagnosis and if a client is adamant for a repair, then “throwing” parts until it’s fixed is the only solution.
Like I said before I ran the new module routine and it completed without any errors so I would surmise that was not the problem in my case.
It is perplexing the EPB works fine through SDD but then I was told it bypasses certain things which would explain that then.
Yeah, no CAN issues. I think there was a code for the Hall effect sensor but that went away. I can manually operate the parking brake via SDD, it’s just not working when not using SDD. If I could bin the whole bloody thing I as I didn’t even use them and saved weight is saved weight.
Did you ever resolve the "Cannot Apply Parking Brake" issue. I have the exact same problem. My shop wants to put in a new module. Ten hours of labor plus approx $400 for the part...ouch
I've removed the fuel tank to fit a fuel cell in the spare well and replacing the rear sway with a custom uprated one so with all this out of the way, I reckon it'll be easy to R&R the actuator on mine. If I do that and not bin it all, I'll post up what happens.
Did you ever resolve the "Cannot Apply Parking Brake" issue. I have the exact same problem. My shop wants to put in a new module. Ten hours of labor plus approx $400 for the part...ouch
No. I am living with it ... as one lives with herpes... its always there but you can hide it when you need to.
My dealer also suggested to replace the module and program a new one. The explanation was that U0417-81 was the only relevant code showing up, making it seem that the module was sending invalid data due to it being faulty.
Let us know if you end up replacing it. Not sure where the 10 hrs of labor comes from? Its right behind the fuse box in the back seat. Maybe an hour to swap, an hour to reprogram. They said I can install 1 myself and have them reprogram it, but still no guarantee the issue will go away.
The shop told me they have to drop the back end in order to reach the unit (module terminology may have been a mistake by me). They do a lot of work on Land Rovers and tell me this is a common problem on those cars. Jaguar uses the same parts.
Unfortunately I cannot live with it as Mass requires a working parking brake in order to get an inspection sticker. The kicker is I will only use the parking brake once.....to get the sticker
Yes it would have to be the actuator. But this has me thinking about something, I had changed the CCF in SDD to EPB not fitted thinking perhaps this would program the BCM to not see the EPB actuator and module but that experiment failed I still continued to receive the error. Funny thing is when I disconnect the battery, I'm prompted for the reset procedure which in fact operates the brake and then the MIL. So now I'm wondering what would happen if I removed the fuses for the EPB actuator and module. It's a tough decision because when I originally did the Alcon upgrade I opted not to fit park brakes but that didn't work because the actuator wanted to see tension on the cables so I had no choice to track down a set from an Aston and then get the last ever set of special rear caliper mounts direct from Jaguar. And then I never used them...
Jahummer i'm still confused by your situation... you can manually actuate the EPB with SDD but the fault still shows up? Are you getting U0417-81 at all?
Got the 'Parking Brake Fault' today. It seems to come and go along with the 'Cannot Apply Parking Brake' fault. One of them is always present but never both at the same time. Tried charging the battery and doing a battery reset, but no help.
So I 'interrogated the module' and got:
C1799 - Hall effect circuit failure
C1802 - Motor engage current not reached or traveled too far upon apply
U0101 - Lost communication with transmission control module
U0155 - Lost communication with instrument cluster control unit
I get the U0101 every now and then but don't think its relevant to this.
Reading the data from the module, it looks like the parking brake switch works fine. Only failure i see is 'EPB failure management mode 7 - Actuator position fault'
Here are the failure modes for the 2 relevant codes:
Next move is to visually inspect the cables and calipers.
I sprayed some WD-40 on the sway bar bushings the other day and I'm thinking some of it got on the Actuator connector since its right there. Getting to the connector is harder than getting to those bushings so I might be screwed if the connector is fouled up.
Any suggestions?
i have a parking brake fault sometimes with the transmission fault as well.It pops up every once in a blue moon when i get a heavy foot and start hauling *** when i switch it in sport mode with dynamic mode on.I also use the parking brake a lot when i park on the hill at my home.I think it's just a error your car makes with a miscommunication.If it's not driving funny and everything goes back to normal and your obd scanner no longer picks up these errors,I wouldn't worry about it.But if u notice it driving sort of funny and weird noises and the codes not going away,u might want go get that checked out.Then again,i'm also in need of a new battery cause this 1 been in the car since it was made.That also could be the problem with your battery not being able to supply enough voltage if it's getting really old and dull like mine cause this car uses a HELL of a lot of electronics and the battery needs to be top notch condition to supply them all
Last edited by Barry Leftwich; 12-02-2021 at 06:58 AM.
My issue has been solved. Replaced the parking brake actuator and both cables. The tech showed me how one cable was very sticky. The other operated smoothly.
5 hours of labor and a new actuator.
08-30-2021, 09:07 PM
