HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Blogs
Made by Monkeys

The Brake Sensor’s Gone Mad

View Comments: Newest First|Oldest First|Threaded View
<<  <  Page 3/3
Larry M
User Rank
Platinum
Aha! A Hall effect device! No wonder it failed.
Larry M   5/23/2013 3:38:08 PM
NO RATINGS
I have concluded that Hall effect devices are simply too frail for the extended temperatures and vibration of an automotive environment. I've had a couple go intermittent and/or fail in my 1992 Mitsubishi (250 K miles). They never put them in some inexpensive assembly. You must buy a new distributor or throttle body assembly at a few hundred dollars each (assuming you use the dealer and not the junkyard).

I don't know how you would tell in advance of buying a car whether Hall effect devices were used but I would avoid them if I could figure out how to.

 

apod
User Rank
Iron
Re: The fundamental problem with most dealer repairs.
apod   5/22/2013 8:14:19 AM
NO RATINGS
So agree with you. Had a similar experience with a Mini Cooper Dealer. Brought the vehicle in for a T'stat change, gasket was leaking, impossible to get to without mini hands, pun. They came back wtih about $10k of immediate needed repairs: new clutch to fix a mysterious leak (that was the antifreeze), new power steering fan, new tires, new radiator fan, and a couple other things. A year later, just the t'stat had to be replaced and also had to bring back because work was not good, I was still leaking out fluid. Go to a real mechanic.

William K.
User Rank
Platinum
The fundamental problem with most dealer repairs.
William K.   5/21/2013 12:18:14 PM
The single HUGE problem with having a dealer service a vehicle is that they never repair anything, they only replace parts. Sometimes replacing a part is indeed the only way to solve the problem, but in many cases that is not what is actually required. So unless a problem clearly requires a part replacement that needs tools that I don't have access to, I do the repair myself. I am totally unwilling to pay $160 or more per hour to have somebody randomly change parts until a symptom goes away.

Ed Fuller
User Rank
Iron
Re: The Brake Sensor's Gone Mad
Ed Fuller   5/21/2013 12:03:18 PM
NO RATINGS
Confession time.

In my younger years I once had a brake light that would come on whenever I applied my brakes.  My first thought was that there was a problem electrical connection, but then I learned that this was a feature of the brake system.  When the fluid was low in the master cylinder and the brakes were applied, the fluid shifted forward and the light sensor was exposed turning on the light.  Once the car was stopped or accelerating, the fluid shifted back covering the sensor and turning off the light.  Solution to the problem:  add fluid (I wasn't real big on preventive maintenace at the time).

I can't say if this is "normal" operation in all vehicles, but it was new to me at the time.  I had not given the light much thought before then and had supposed that it was to tell me when my brakes were "bad."

In hindsight, the problem was obvious but I guess we all have to learn sometime.

kf2qd
User Rank
Platinum
That's an easy fix...
kf2qd   5/21/2013 11:55:14 AM
NO RATINGS
Had a similar type problem with my wife's Plymouth Breeze. The Check engine light would come on because a sensor in the transmission was faulty. And this light was where it was really annoying at night. The Fix? A sript of Black Electricians Tape. Didn't see the light, could ignore the problem.

DB_Wilson
User Rank
Gold
Re: it's always the whole instrument panel
DB_Wilson   5/21/2013 8:56:31 AM
NO RATINGS
Many places don't look for the easy and simple fix first.  I repaired an intermittant brake warning light by adjusting the parking brake cable. 

Pubudu
User Rank
Platinum
Re: it's always the whole instrument panel
Pubudu   5/20/2013 2:37:28 PM
NO RATINGS
Paul, we have to be aware when we go for a agent they will quote us more usually not locking at the right problem.

Sometimes back I had a noise in my front left window when operating the glass, I also got a quote for repair that which is not in my budget from the agent, and they wanted to replace the pump. So I wanted to fix it as it is and get the vehicle back after paying the inspection fees only. Fortunately there is no noise at all after re-fixing it back and still it's working properly. 

naperlou
User Rank
Blogger
it's always the whole instrument panel
naperlou   5/20/2013 9:06:44 AM
NO RATINGS
Paul, This story is so often repeated that you think it would have been fixed by now.  The design of automobile instrument pannels is a sham.  That, in many cases, you have to take out a whole instrument pannel to check or change a bulb is silly.  It is somwhat depressing that this is still the case in the 21st century.

<<  <  Page 3/3
Partner Zone
More Blogs from Made by Monkeys
Made by Monkeys highlights products that somehow slipped by the QC cops.
Made by Monkeys highlights products that somehow slipped by the QC cops.
Made by Monkeys highlights products that somehow slipped by the QC cops.
Made by Monkeys highlights products that somehow slipped by the QC cops.
Made By Monkeys highlights products that somehow slipped by the QC cops.
Design News Webinar Series
11/19/2014 11:00 a.m. California / 2:00 p.m. New York
11/6/2014 11:00 a.m. California / 2:00 p.m. New York
10/7/2014 8:00 a.m. California / 11:00 a.m. New York
12/11/2014 8:00 a.m. California / 11:00 a.m. New York
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Dec 1 - 5, An Introduction to Embedded Software Architecture and Design
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Last Archived Class
Sponsored by Littelfuse
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2014 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service