Rennlist Discussion Forums   classifieds | membership | rennlist | photo album    
sponsors | upload photo | chat    
 
Go Back   Rennlist Discussion Forums > Water Cooled Technical Discussion Areas > Porsche Cayenne Forum
Sign in using an external account
Register Forgot Password?
Search


Reply
 
Thread Tools Search this Thread
Old 01-10-2012, 07:29 PM   #1
SELLC
New User
 
Join Date: Jan 2012
Posts: 4
Default Brake Pad Warning light question

Recently did front and rear pads on a 2009 Porsche Cayenne and I had a few questions.

What I am wondering is if the Brake pad warning light is supposed to come on every time you turn on the vehicle? The warning indicator turns off immediatly once the vehicle is started and does not come on while driving but there is a yellow exclamation point lit up within the tach.

I read in the owners manual that upon turning the vehicle on it should display the brake pad symbol on the IP which it does, and it also shuts off too. (Page #165)

When the brake pads are low and the sensors ground out on the rotors will that trip the brake pad warning light while driving? Right now the light only comes on when you first start up the vehicle, then goes off and stays off. But that yellow exclamation point makes me wonder.

I should also add that these front pads on the Cayenne are the biggest I have ever seen on a passenger vehicle! MASSIVE! They look like they should go on a mac truck! LOL

Any help or info you can share about the Brake Pad warning light would be great!

Thanks in advance!
To remove this ad, register today or login if you already are registered!

Attached Images
 
SELLC is offline   Reply With Quote
Old 01-10-2012, 07:43 PM   #2
seankrider
Addict
Rennlist Member
 
Join Date: Aug 2009
Location: El Dorado Hills, CA
Posts: 652
Default

When my "Brake Workshop" indicator comes on from the sensors wearing, they show the large icon/words in the main gauge when I start the car, then it move down to the little icon near the bottom of the gauge. Of course, I usually have 5 or 6 things cycling through the little warning icons, like blinker light, washer fluid, low gas, etc., so it gets lost.

But I think once you trip the sensor (i.e. wear through the pads to it), it should be perpetually on until you change the sensors.
seankrider is offline   Reply With Quote
Old 01-10-2012, 08:36 PM   #3
Divot
Tranny Expert
Rennlist Member
 
Divot's Avatar
 
Join Date: Mar 2008
Location: In my exclusive Cayenne
Posts: 15,304
Default

I think if you trip the idiot light, you need to reset with a PIWIS.

I'm speaking from my experience tripping idiot lights, not from expertise in these matters.
__________________
Quote:
Originally Posted by rijowysock
honestly dont even wanna hang out here anymore, banter is one thing... but the cayenne forum is out of hand.. even the moderator doesnt take anything seriously..

u guys should read the 997 forum maybe, even the off topic forum stays more on topic.

just embarassing,
Divot is offline   Reply With Quote
Old 01-10-2012, 08:53 PM   #4
SELLC
New User
 
Join Date: Jan 2012
Posts: 4
Default

I should also mention the low brake pad light is really more of an image, with the words "Brake Pads" under a symbol that looks like this (0)

This vehicle has a little LCD display, so it's not like the traditional "light" per se.

My Mercedes has similar style pad sensors but I find the mounting of said sensors is far superior to that of Porsche. I also get more than 35-37,000 miles out of a set of pads too, but hey...
SELLC is offline   Reply With Quote
Old 01-10-2012, 11:29 PM   #5
yeldogt
Addict
Rennlist Member
 
Join Date: Aug 2003
Location: Philadelphia
Posts: 448
Default

Did you put new sensors on when you did the brakes?

Some report being able to reuse the sensors if you get them before they hit the rotor -- but I always find the insulation hard and for the small cost I just replace them.


With my 06 the warning will come up every time you hit the brakes and the sensors hit -- you can still use the display but the "!" will remain.

Sounds like you have a short in the wires or a damaged sensor that it setting off the warning
yeldogt is offline   Reply With Quote
Old 01-11-2012, 10:29 AM   #6
JAGMAN1
User
 
Join Date: Oct 2009
Posts: 128
Default

Normal behavior if the warning has been tripped is this:
On startup, a large display warning will appear with the words "brake pads workshop" with the brake symbol on the display.

After a short time that warning will time out and only the little brake pad symbol will be illuminated. If you were to go into the "warnings/indications" part of the main menu of the mfd you will see the full warning as I described above.

The only way to clear that warning is to replace the sensor at the brake caliper.
JAGMAN1 is offline   Reply With Quote
Old 01-11-2012, 02:14 PM   #7
SELLC
New User
 
Join Date: Jan 2012
Posts: 4
Default

I did not replace the sensors as I could not source any in time. The customer needed the vehicle ASAP.

The little brake pad warning symobol only appears when you first turn on the vehicle then it never re-appears, however that yellow exclamation point in the tach area remains lit.

Strange how these work, as I am most positive that they are not grounding out which is probably why the indicator does not come on while driving or braking. The manual says the brake pad warning should appear every time you first start the vehicle (Page 165) as an indication that the system is working.

While I am not impressed with the life of brake pads on these Porsche, I am very impressed with the braking in terms of stoping power. I think you could throw the passenger thru the windshield if you hit the brakes hard enough! LOL!

I am guessing there is a break in the wire for the sensors, which alerts the system that there could be a problem in the system (ie the yellow exclamation point) however since there is new pads on there it's no longer grounding out which is possibly why the light no longer comes on while driving and or braking. Would this be correct?

Buying the sensors is much less expensive online than at the local parts store/dealership. In my case both required them to be ordered so I figured why not let the customer save some money.

I should also mention that brake pads for these cars can really cost a lot! Some brands were in excess of $300! The customer elected to go with the cheaper pads ($50 front, and $30 rear) which seem to perform well enough. I was told the vehicle is a lease, so you cant really fault the guy.

All told this brake job cost the customer $250.00 parts and labor (not including sensors), which is FAR better than the $1200 he was quoted at the dealership. If anyone needs brakes done in the Metro Detroit area feel free to send me a PM. I am a certified and licenced mechanic, of course I specialize in Mercedes, but it never fails that my drive is always full of German vehicles, regardless of the make.

All the best,
SELLC
SELLC is offline   Reply With Quote
Old 10-27-2013, 03:01 PM   #8
kirk4
User
 
kirk4's Avatar
 
Join Date: May 2008
Location: Charleston,WV
Posts: 15
Default

I wish I would have read this post before replacing the pads. Just got finished replacing all the pads and the pad sensor light is still on. I thought I screwed something up, I did. Didn't replace the sensors. On order now. Thanks.
kirk4 is offline   Reply With Quote
Old 10-28-2013, 05:51 AM   #9
mudman2
Moderator !x2
Rennlist Member

 
mudman2's Avatar
 
Join Date: Jun 2003
Location: Southeastern PA
Posts: 5,658
Send a message via Yahoo to mudman2
Default

The sensors are a one hit, when they trip they are forever tripped they have to be replaced
__________________
Mike

08 Cayenne Twin Girls
Marine Blue Metallic, Havanna/Sand Beige Full Leather, Clear Side Markers, MoBridge/BT
gallery
To a new home with 130K -04 Cayenne S, Titanium Metalic / Black, PCM Air, BMC Air Filters, FabSpeed Cat Bypass Pipes and Dual Tips. MoBridge iPod / Sirius and BT
gallery
mudman2 is offline   Reply With Quote
Old 10-28-2013, 12:54 PM   #10
tgavem
Addict
Rennlist Member
 
tgavem's Avatar
 
Join Date: Oct 2012
Location: Houston
Posts: 474
Default

I took mine off the pads and taped them to the solid part of the brake lines before they had a chance to trip. No worries. I visually check my pads every couple of months and replace early. When I sell, I will just re-install. Dealer do give me a hard time when I service it.
For my 996 I cut the cable and twisted the two cables together ........
__________________
I never let ignorance prevent me from expressing an opinion

2011 Cayenne S
2005 996 GT3
2007 997 4S cab
2006 997 4S cab (past)
tgavem is offline   Reply With Quote
Old 10-28-2013, 01:01 PM   #11
mudman2
Moderator !x2
Rennlist Member

 
mudman2's Avatar
 
Join Date: Jun 2003
Location: Southeastern PA
Posts: 5,658
Send a message via Yahoo to mudman2
Default

or you could do that and save yourself 48 bucks
mudman2 is offline   Reply With Quote
Old 01-22-2014, 06:48 PM   #12
Lee0826
New User
 
Join Date: Oct 2013
Posts: 2
Default Brake job

Quote:
Originally Posted by SELLC View Post
I should also mention the low brake pad light is really more of an image, with the words "Brake Pads" under a symbol that looks like this (0)

This vehicle has a little LCD display, so it's not like the traditional "light" per se.

My Mercedes has similar style pad sensors but I find the mounting of said sensors is far superior to that of Porsche. I also get more than 35-37,000 miles out of a set of pads too, but hey...



TRYING TO PM YOU BUT COULDNT. WHERE EXACTLY ARE YOU LOCATED? I am in the metro Detroit area
Lee0826 is offline   Reply With Quote
Old 01-22-2014, 06:48 PM
Rennlist



Paid Advertisement
Reply

Tags
06, brake, cayenne, changing, exclamation, fluid, low, mark, pad, pads, porsche, reset, sensor, sensors, warning, workshop, yellow

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump


All times are GMT -3. The time now is 08:59 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
SEO by vBSEO 3.6.1
Copyright ę 1998 - 2007 Rennlist.com

Advertise on Rennlist - Privacy Statement - Terms of Service - Jobs