Cement 875 Report post Posted November 20, 2022 I'm trying to get to the bottom of the things that can cause the dash brake light to stay on (red) in my E46. So far I have: Validated I'm getting all 4 wheel speeds from the ABS unit Validated the make / break switch on the handbrake itself is functioning Checked there is plenty of brake fluid in the reservoir When I lift the handbrake slightly when driving I get the audible beeps so that confirms the actual switch function. Anybody aware of the requirements for the light to go out ? Quote Share this post Link to post Share on other sites
C-130 Hercules 571 Report post Posted November 20, 2022 (edited) Shot pad sensor? (assuming you checked that pads are within wear limits?) Edited November 20, 2022 by C-130 Hercules Second thoughts... Quote Share this post Link to post Share on other sites
Cement 875 Report post Posted November 20, 2022 7 minutes ago, C-130 Hercules said: Shot pad sensor? (assuming you checked that pads are within wear limits?) Brand new pads, discs and sensors all around ... but in saying that it could be wiring or similar hmmm. Any way to check via INPA or other diagnostics so I don't have to jack it all up in the air etc ? Quote Share this post Link to post Share on other sites
Eagle 1662 Report post Posted November 20, 2022 Any codes on any of the systems? Brake fluid switch ok? Quote Share this post Link to post Share on other sites
Cement 875 Report post Posted November 20, 2022 10 hours ago, Eagle said: Any codes on any of the systems? Brake fluid switch ok? I did look at the codes, and nothing stood out from memory ... ASC was moaning about no CAN signal to / from the ECU (which has been removed). Checked the brake fluid sensor connector but unsure how it functions, one terminal was ground and one had about 10v on it. Might take a look at the wear sensors next i think, assume continuity is broken when the sensor wears through normally and I should be able to jumper the plug to simulate 'all good' ? Quote Share this post Link to post Share on other sites
Eagle 1662 Report post Posted November 21, 2022 Yeah jumper across the brake fluid connector and brake pad wear sensor will turn off those lights off I think the brake wear warning is a yellow ! light not red, red is handbrake and fluid level at least. 1 Quote Share this post Link to post Share on other sites
Cement 875 Report post Posted November 21, 2022 5 hours ago, Eagle said: Yeah jumper across the brake fluid connector and brake pad wear sensor will turn off those lights off I think the brake wear warning is a yellow ! light not red, red is handbrake and fluid level at least. I'll get it jacked up shortly and bridge everything out to see if there is any change 👍 Quote Share this post Link to post Share on other sites
