[goto35]

Can't get the brake light to turn off. And can't reset. Either manually or even by bimmerlink won't allow me to reset the rear brake sensor.

When I reset all codes by bimmerlink the code just stays there.

How do I reset it?? Is it a dealer only thing or can i do it with a app? I have bimmer code bimmerlink and neighter works to get rid.

[3PedalJake]

If you can't reset it means there is still a problem, check the connector and wiring.

[e91Owner]

You did replace the sensor with a new one, correct? It won't clear if you're using one with a previous reset on it.

This comes up frequently when people are replacing their pads/rotors, but neglect to change the sensor and cannot reset the CBS.

[3PedalJake]

You're not actually resetting the sensor tho, that should last forever if you change your brakes before it wears thru the wire in the sensor, after that they can't be reset.

OP did you change the brakes because the light was on? If so how were the pads? Actually wore out? If it the connector or a critter chewed thru the wires over the wheel liner like mine the light will come on and never go out.

[e91Owner]

Originally Posted by 3PedalJake

You're not actually resetting the sensor tho, that should last forever if you change your brakes before it wears thru the wire in the sensor, after that they can't be reset.

OP did you change the brakes because the light was on? If so how were the pads? Actually wore out? If it the connector or a critter chewed thru the wires over the wheel liner like mine the light will come on and never go out.

It depends what you mean. The sensor itself will last forever in terms of triggering a wear signal if it has not worn through. However, you cannot reset the CBS on an old sensor. It appears that it is the same issue for 5DEX faults according to other threads. Until you replace the sensor, it will persist. I personally have not run into this code, but have had it when replacing the brakes for the 1st time. Admittedly, though, most people face this problem when brakes need replacing, not randomly.

To the OP, I just noticed In your title that you say you replaced the sensor. If that's the case, attempt to reset it via the CBS as opposed to clearing the code. It will reset the date/km in The CBS, but it will not affect the wear sensitivity of the new sensor. If you note the values prior to the reset, you can correct the values after the reset in ISTA through Vehicle Management => Service functions => Maintenance => CBS correction vehicle data.

[Serf27]

I never understood how that sensor goes bad.
It just picks up signal at a certain point, and should continue working once the pads are replaced.


Did you change the pads too?
A new sensor on old pads should still trigger the light.

[goto35]

Yes changes the sensor.

But FYI old sensor was fine and old brake pads were fine too. Ended up changing both anyways

But the light is on

[3PedalJake]

Originally Posted by Serf27

I never understood how that sensor goes bad.
It just picks up signal at a certain point, and should continue working once the pads are replaced.


Did you change the pads too?
A new sensor on old pads should still trigger the light.

It works the same way those termite sensors with the strip of wood and conductive trace work. When the brakes wear the the wire at the end of the sensor or the Termites chew thru the wood it breaks the circuit tripping the light. If you jumper the connector under the wheel liner with a paper clip the light will reset the same as a new sensor as long as there's no other upstream wiring problem.

A new sensor with old pads will work briefly until you wear thru the new sensor.

[3PedalJake]

Originally Posted by goto35

Yes changes the sensor.

But FYI old sensor was fine and old brake pads were fine too. Ended up changing both anyways

But the light is on

You need to check your fuses, connector and wiring. Pull the wheel liner and look at it all, I've had 2 BMWs with wires chewed by critters. The connectors get brittle too. Do you have a scanner? Or a volt meter? You can just check for 12v at the connector.

[mapleleaf1773]

Or you can unplug the sensor at the wheel. Cut it off near the liner and tie the 2 wires together. Then heatshrink it and presto. No more light - ever.

[Serf27]

Originally Posted by 3PedalJake

It works the same way those termite sensors with the strip of wood and conductive trace work. When the brakes wear the the wire at the end of the sensor or the Termites chew thru the wood it breaks the circuit tripping the light. If you jumper the connector under the wheel liner with a paper clip the light will reset the same as a new sensor as long as there's no other upstream wiring problem.

A new sensor with old pads will work briefly until you wear thru the new sensor.

Yea I get how it works.
If you replace your pads in time, the old sensor should in theory work forever.

[e91Owner]

It's not quite as simple as this. The sensors themselves incorporate a resistor which is why jumping the pins or bypassing the resistor by cutting it off and connecting the wires bypasses the resistance identifying it as a new sensor.

Once the code generates, it does not electrically last forever. The resistance value much change to clear it. As others have reported, clearing the code directly doesn't work even when jumping the pins. Clearing it via a CBS reset for the affected brake has however.

[goto35]

My problem is light is on while sensor was fine. I even got the pads and sensors changed but stays on

[gbalthrop]

Originally Posted by goto35

My problem is light is on while sensor was fine. I even got the pads and sensors changed but stays on

Actually, "your problem" MAY be that we don't even know if "E9x" info is correct for YOUR Vehicle, WHATEVER it is.
HAVE YOU TRIED putting a paper-clip or wire "Bridge"/ "Jumper" in the Sensor Socket?
What Fault Code(s) do you have (in DSC Module)?
What CC-ID Code(s) do you have using "Check Control" to read?
WHAT Model BMW, with WHAT Build Month/Year does this relate to?
Please provide Last-7 Characters of VIN, and we can supply correct wiring diagrams and testing suggestions.
George

[e91Owner]

Originally Posted by goto35

My problem is light is on while sensor was fine. I even got the pads and sensors changed but stays on

You need to be a little more explicit as to what you've done to remedy the problem. Even if it were just the sensor, simply replacing it and attempting to clear the code will not work.

[goto35]

2006 Bmw 330i e90.

Thanks folks.


So rear sensor came on when I was clearing the service indicator.

Hired a mechanic to replaced the rear pads and new sensor.

Won't clear and brake light still on.

[Fritzer]

Did you replace the sensor too? The sensors should be replaced every time you service the brakes, they are one-time use.

[e91Owner]

So to recap, you tried to reset the CBS indicator before the new brake wear sensor was installed, but have not reset the CBS indicator after it was installed?

Did you use the turning signal stalk to reset the CBS the first time or an OBD tool (INPA, ISTA, etc.)?

If you have not yet reset the CBS on the new sensor, attempt a reset of the CBS (not just clearing the code) with whatever OBD tool you are using.

If the service notice still exists, rather than going through another cable, jump the sensor terminals and then attempt to reset the CBS while they are jumped using one of the methods previously mentioned. The message should go away. Reconnect the new sensor cable after.

If none of those easy fixes work, you're going to need to start digging into wiring. You'll find this is a common problem in the forums and in nearly every instance, it is the sensor cable combined with improper resets of the system.

[gbalthrop]

Unless I missed something, he has NOT reported a DTC or a CC-ID Code. ONLY that an unidentified Warning Light(s) appears on Instrument Cluster (probably "BRAKE" & "Car on Lift").

NOT sure WHY he believes Warning Light relates to RR Sensor circuit as opposed to LF Sensor. AFAIK, the "Pad Wear Sensor" Warning Light (Separate issue from CBS) is NON-specific for Front vs. Rear. If my understanding is INCORRECT, please advise.

OP, PLEASE conduct the "paper-clip"/ Jumper test to see if light goes out when you electrically "CLOSE" the circuit. If you have any questions about HOW or WHY to conduct that test, please let us know.

You do NOT have to "Reset" the CBS system to have the light go off. You ONLY have to "Close" the Sensor circuit. Applying the "Jumper" or paper clip "U" between the two Chassis Connector Sockets (disconnect the Sensor connector from the Chassis Connector & "Jumper" the Two Chassis Connector Sockets) SHOULD make the Warning Light go out, UNLESS there is another issue.

Keep in mind that we don't know if the light relates to the FRONT sensor circuit, or REAR Sensor circuit. You have ONE sensor on the Right-Rear Inboard Pad, and a similar Sensor on the Left-Front Inboard Pad.
George

[e91Owner]

He says he has a 5DE1 code in the title. This is not just an e90 thing, but applies to other BMWs as well of similar age. Not sure why the system is designed that way, but the fault will not clear even in a closed circuit by clearing the fault directly. CBS resets do however clear it, assuming that is problem is sensor driven.

This usually results from a botched attempt at replacing the brakes and an improper reset. You can fix this in ISTA with a CBS correction, but it does not sound as if the OP has ISTA.

goto35 when you look at the service remaining in CBS for the front and rear brakes, what does it say (either from bimmerlink or the device display in the car)?

You can see some more details from this TSB, but it is ISTA specific. Note, this identifies a need to reprogram the vehicle if the brake is reading 255% with the 5DE1 code. However, with the current version of ISTA you can correct this CBS data without reprogramming.

https://static.nhtsa.gov/odi/tsbs/20...49431-9999.pdf

[jdstrickland]

Originally Posted by goto35

Can't get the brake light to turn off. And can't reset. Either manually or even by bimmerlink won't allow me to reset the rear brake sensor.

When I reset all codes by bimmerlink the code just stays there.

How do I reset it?? Is it a dealer only thing or can i do it with a app? I have bimmer code bimmerlink and neighter works to get rid.

Isn't this forum for the E9x 3 Series cars, you are posting that you have an X6, or something that's not a 3 Series.

The Brake Wear Sensor should be similar, though. If you have an indicator light to tell you that the brakes are worn -- there are two of these, one on the left front and one on the right rear -- then the sensor must be replaced in order to turn the indicator light off. On the older cars, all you need to do is set the key to ON and wait for a few seconds until the car realizes that the circuit is complete.

Basically, the brake wear sensor is very similar to the band inside of a fuse. This band is routed over a plastic block that rubs on the rotor when the brake pads get thin, the band gets worn through and the circuit opens and turns the light on. You do a brake job and replace the sensor, this completes the circuit again and the light goes out.

[goto35]

I have a 2006 330i e90. As e90 as they get. Lol