[Jim1985]

Right I've had the code CC ID 71. Red light showing car on ramps, and the brake warning light (handbrake light). There's some occasional squeaking with light pedal pressure. Had a wheel off and the pads seem fine (at least the outer pads). Did a scan for codes and it threw up 005DE0 and 005DE1.
Any ideas? I don't really want to be replacing pads that are in good working order chasing a problem around.....

[Aragorn30d]

if the pads are good, replace the sensors and reset the computer.

[Jim1985]

Am I right in thinking that if the pads are, say, 30% worn, and I put in sensors that are 0% worn (i.e. brand new), then within a few miles the sensors will be ground away to being the same wear level as the pads? Or will they 'read incorrectly' so to speak?

[Aragorn30d]

From what i've seen, the sensors dont touch the disks at all until they're more than half worn.

I took some used but not heavily worn pads (perhaps 30-50% worn) out at the weekend and the sensor was completely below the pad surface.

[Jim1985]

Ah ok. That makes sense. How hard were the caliper bolts to undo?

[Aragorn30d]

fairly, as its kinda hard to get a decent pull on the ratchet, I used a short "cheater bar" over the ratchet handle to get enough leverage.

However you dont need to touch the calipers to swap the sensors, the sensor unclips thru a hole in the bridge of the caliper.

[Jim1985]

Ah thanks. I was after taking the caliper off to get a good look at the inboard pads. I'd hate to replace the sensors thinking the pads were fine, then end up ruining the discs as well.

[Aragorn30d]

aye fair play.

I think you can probably simply remove one of the sliders and twist the caliper round to access the pads, rather than removing the whole thing. but the sliders are often a stupid size hex key (7mm quite often)

The big bolts that hold the calipers are also stupid, they're 16mm.

[Jim1985]

Looks like a fun night for me then!

[old grey steve]

Apart from re setting the counter for the pads (assuming the sensors OK) most leave it as that but those codes to me indicate that the DSC is reading low pad wear the DSC needs to be re set as well and told new pass are fitted sound strange but we see a lot of it and once done solves many a mystery

[Jim1985]

Ah fantastic Steve. It brakes completely fine, I gave it a good bootfull (not intentionally, bloody foxes) and it didnt pull to one side, no funny noises etc. Is it worth checking the in board pad or is it unlikely to be worn and be the culprit?

[old grey steve]

Originally Posted by Jim1985

Ah fantastic Steve. It brakes completely fine, I gave it a good bootfull (not intentionally, bloody foxes) and it didnt pull to one side, no funny noises etc. Is it worth checking the in board pad or is it unlikely to be worn and be the culprit?

Check everything sounds bloody obvious but most don't

[Jim1985]

Ha ok Cheers for the help

[Jim1985]

Just had a wheel off and been to have a look. Inboard pads are fine. So all in all, the rear pads have a reasonable amount of meat left (approx 5mm). I noticed there was one rear brake wear sensor missing, and then a bit of Googling showed me that there should only be one anyway. Now this looks fine, not too worn. However a bit of the wiring has rubbed, but looks fine. Also, since resetting it yesterday evening, the brake warning light hasn't come back. Cant explain why the codes appeared from nowhere last week, but I'll consider a new sensor seeing as its not exactly rocket science to fit it.

[old grey steve]

Originally Posted by Jim1985

Just had a wheel off and been to have a look. Inboard pads are fine. So all in all, the rear pads have a reasonable amount of meat left (approx 5mm). I noticed there was one rear brake wear sensor missing, and then a bit of Googling showed me that there should only be one anyway. Now this looks fine, not too worn. However a bit of the wiring has rubbed, but looks fine. Also, since resetting it yesterday evening, the brake warning light hasn't come back. Cant explain why the codes appeared from nowhere last week, but I'll consider a new sensor seeing as its not exactly rocket science to fit it.

Sensor wise you only have one for the front axle one for the rear. Pad wise as you've stated there sems to be meat there, as I said the code looks DSC related to me meaning you need to tell the hydro unit that new pads are futted as well as just telling the cars CBS clock and re setting the counter seen this loads of time last one I saw when some one had changed the pads with Mike's grimwood1992's M3 that still had DSC data stating low pad wear it know no different unless told ne wpads have been fitted.

As your 335d has DSC+ trust me that's something you need to tell the car

[Jim1985]

Definitely will do! What's the best way to do this?

[old grey steve]

Originally Posted by Jim1985

Definitely will do! What's the best way to do this?

I can only speak for ISTA and AutoLogic but you'll go in to the required field or carry out a quick test if you were to do a quick test a series of stored faults(whether current, present or stored would be displayed)you'll be looking at the DTC/DSC section, we go in to this block via fault code, by clicking on the fault code you open up that particular field by looking at this it'll probably register brake fluid level too low, by this it means the pads were low, despite changing the pads and resetting the counter for CBS the DSC/DTC will still be unless told otherwise this information, we simply do all this on a brake pad/pad disc service as its standard practice most places as we have een countless times don't so that how we do it.

Sure as I've stated the pad wear sensor could be defective, on FRiday last week for instance talking of pad lights we had a 330d in which had a brake pad light on pads were new yet the fault was present, we actually discoverd a Mini wear sensor had been used, plus the DSC set up showed the corosponding fault re pad wear as it hadn't been instructed

[Jim1985]

Ah fantastic thank you so much. For the price I might just order a new one. Are the eBay ones acceptable quality? I'll be having some coding done at the weekend so I'll add it to the list.

[Aragorn30d]

Sounds like your basically just resetting/clearing the fault codes on the DSC module then?

Easy enough to do with INPA or Carly, but ofcourse you can only clear them once you've fixed it.

[old grey steve]

Originally Posted by Aragorn30d

Sounds like your basically just resetting/clearing the fault codes on the DSC module then?

Easy enough to do with INPA or Carly, but ofcourse you can only clear them once you've fixed it.

Your just going in tothe DSC reading data(low pad wear- it will register low brake fluid as the pads wear thinner)you've just got to inform the DSC unit that the cars had a pad change so yes basically resetting everything back to fresh, providing those codes corrospond to what I think they are and that's pad wear registerd in the DSC, but its my guess hopefully the codes don't corrospond to something else like a hydro unit fault but these codes that OP's displayed "005DE0 and 005DE1" do ring a bell and I'm sure they are hydro related, hence what I said earlier so I'll have a look

[Aragorn30d]

Yeh they are pad wear codes.

My brother had them on his after changing the pads and not replacing the sensors (he didnt have any and the old ones disintegrated), but we just cleared the codes and they went away after we "fixed" the wear sensors by soldering the wires together.

[old grey steve]

One we did earlier today as you can see



codes are like yours as I said and its DSC related meaning, meaning that to clear despite changing pads, pad sensor re setting the counter you've got to go into the DSC side of things as well to inform this that everythings been changed. A common mistake we see. Simple to sort once you know