The cars with Brembos are the ones with separate EPB pads, I think due to the way the Brembos work.

 

Rick,

Thanks for posting the diagram showing the various module locations. This morning I pulled my trunk right-side trim panel, located the park brake module, saw the two electrical connectors on the bottom of it, so I unclipped and reseated both of them and made sure they were firmly seated in their sockets. Started the engine, and unfortunately no change in the two dash messages and the amber warning light is still on. Did a brief drive cycle around the neighborhood hoping they would disappear. Still no change....

 

As I posted, I reckon you'll need to check the motor.

 

Yep. Jacking the rear end of the car up on jackstands, pulling the rear wheels, and climbing underneath it is next on my list. While I'm underneath it I'll look for the motor and the actuator and I hope to get a good look at the condition of the cables. No idea how much working/examining room I'll have. I have other things on my agenda the rest of today so I hope to do this job tomorrow. Thanks again to all who have contributed here. Keep your ideas flowing. I'll keep you posted with what I find....

 

You can operate the motor in seconds by unplugging from the module.

 

Update:

My electric park brake cables and brackets were all intact. No cable fraying that I could see or feel. The slight slackness of the cable confirmed that the electric park brake system indeed failed in the OFF mode, so I'm lucky in that regard since I've been able to drive the car for the past week without creating more damage....

I've done all I can effectively do myself without having DTCs to proceed with. So I dropped the car off at my favorite local British indie this afternoon along with my four pages of hand-written notes on what our forum and my JTIS research turned up, and every action that I tried as a result. At various times during the past five years they have advised me over the phone regarding several previous issues I've had to deal with on both of our Jaguars, and their very kind advice has always enabled me to fix those issues myself. So I guess it's about time that I return the favor as an actual paying customer. While they are booked solid through this week, they will try their best to work my S-Type into their schedule tomorrow....

They should be able to read the appropriate B and C codes with their AutoEnginuity diagnostic system. Once I have the codes and understand what's involved, I'll decide on whether to attempt to fix it myself or just let them fix it....

 

Jon,

I hope your indie is able to resolve the issue and that you'll be able to report the solution in the forum for the rest of us who are living with the Park Brake Fault. I've done the basic diagnostics on ours but haven't had a chance to dig into it very deeply. Hopefull what fixes yours may fix mine!

Cheers,

Don

 

Update:

My indie's diagnostic system was not able to communicate with my car's EPB module through the OBDII port yesterday. The associated EPB system fuses all test good so this could be due to a module fault, a wiring issue, or perhaps something a bit more obscure. The next step is for the shop to attempt to source a used EPB module to see if it will work. If it does, perhaps my module has some burned traces on its circuit board and will need to be sent off for solder repairs (just as Jaguar's seat modules and ABS modules sometimes need to be solder-repaired)....

Very frustrating. My dislike for these EPB systems continues to grow with each passing day....

 

I'd operate the motor to show if it's that. As I posted, a few mins work, no special components, no delays.

I'm rather surprised they don't have an appropriate OBD-type tool.

 

I'm with John, it would make sense to eliminate the motor before spending a lot of time with modules and harnesses.

 

They have the appropriate OBD tool. But the EPB module is not responding to it. The other systems on the car are responding....

As the shop owner just pointed out to me, if the motor is bad and the module is good, why isn't the module responding to the diagnostics and calling out the appropriate fault code?

 

Sounds logical, but......just a thought, suppose the motor had a short and fried the module?
Actually it sounds like your guy knows what he's up to and has the benefit of having had his hands on it.

 

Good point about a motor short taking out the module, Norri....

Testing the motor with a direct shot of voltage has been added to the "let's try this" list. For time effectiveness reasons, he's going to wait until he has the used module in hand (expected this afternoon) before he picks up where he left off on my car....

 

Jon, Toby is going at it the right way. We didn't hear from you, so I guess the part has not arrived. Are they going to have to drop the rear to get power for this test?
I understand the idea behind this, but a motor that cuts on and off every time the key is turned would have to be built pretty stout and add tension, not sure how long I would last.
Look forward to an answer.


Wayne

 

Dead easy to power motor without any hassle - could do it wearing a suit. Unplug at module, apply power to disconnected harness. Try each direction.

 

Wayne,

I didn't update last evening because I didn't hear back from Toby. Don't know if that's because the used EPB module didn't show up or because he simply has not had a chance to get back to my car. Keep in mind that he told me he is fully booked this week and he took my car in as a favor with the full understanding that he would try to get to it. I'll wait until mid-morning and then call over there for a status update. I'd like to have at least some understanding of where we are before they close for the weekend. I believe they close at 3:00 pm on Fridays....

 

JagV8, I also need to test my motor and thought using a fuse in the power wire would be a good idea in case there is a short? If so what size would you recommend?
Thanks capt

 

Er, what is there already? Refer to Electrical Guide / Owner Handbook...

 

Update:

Finally managed to speak with the shop about 45 minutes ago. They still have not been able to locate a used EPB module. They close for the weekend in less than one hour (3:00 pm our time). Wish they had shared this information with me this morning. I could have picked up my car and driven it as usual until they get the necessary test parts in-house. My wife had a semi-local death in her family yesterday and several of her Georgia-area relatives are flying in tomorrow afternoon for the funeral on Sunday (I was informed this morning that they will be staying with us, unfortunately). It will be damn difficult to haul these people and their luggage around in her XK8 and my Ram pickup....

 

Update:

The shop cut me a break and stayed open long enough this afternoon for me to convince my wife to drive me over there so I could pick up my S-Type for the weekend. No point in it just sitting there while they are waiting on the appropriate test parts to arrive sometime next week. And it also gives me the chance to do some more fiddling around with the electronics this weekend to get away from the pesky houseguests we'll have....

To be continued....