Thread: Park brake (EPB) sneaking on while driving?

How interesting. You've followed a logical diagnostic procedure (as has your Indy) so I think I would start swapping out parts based on the "easiest first" principle. Perhaps start with a new switch as it's not expensive and easily replaced.
Another thing you could check for is the cable not returning properly at that wheel or one shoe not releasing. Did you or your Indy remove the drum and check the shoes?

Originally Posted by DieselLSE

How interesting. You've followed a logical diagnostic procedure (as has your Indy) so I think I would start swapping out parts based on the "easiest first" principle. Perhaps start with a new switch as it's not expensive and easily replaced.

It ain't the switch. There is no conceivable way a faulty switch could cause that. It's either on or off and if a diagnostic fails you get a flashy light on the dash.

Originally Posted by DieselLSE

Another thing you could check for is the cable not returning properly at that wheel or one shoe not releasing. Did you or your Indy remove the drum and check the shoes?

^^^^ Start there.

I hope the Indie at least pulled the drum to have a look.

I've seen a couple where the friction material has delaminated from the shoe.

Originally Posted by DieselLSE

How interesting. You've followed a logical diagnostic procedure (as has your Indy) so I think I would start swapping out parts based on the "easiest first" principle. Perhaps start with a new switch as it's not expensive and easily replaced.

Thought about that, but I replaced the switch myself in the past year, can't recall exactly when.
I'd get warning lights, and the code reader reported a switch failure. On my indy's advice, I started there and it fixed the problem.

Another thing you could check for is the cable not returning properly at that wheel or one shoe not releasing. Did you or your Indy remove the drum and check the shoes?

I would have hoped so. I think I may ring him to be absolutely sure.
Some time after the switch failure, the EPB started clunking and giving off the odd random squeal. My indy serviced it, and re-adjusted it, and all was fine.
Perhaps he got a bad batch of shoes, or some crap has got lodged in the cable line? That could be likely given I frequently beach or off-road it.

I'd be thinking it's rubbish in the cable or similar stopping it from disengaging properly. ive has the same dtc pop up (intermittently) for a while but with no epb issues at all, many hours at 100kph freeway etc.