FAQ Frequenly Asked Technical Questions. This section is read only, and posts are made by the staff. If you have something to contribute contact any moderator.

Cadillac throttle position sensor - TPS

  #1  
Old 11-19-2007, 11:01 PM
Stealth's Avatar
Super Moderator
Thread Starter
Join Date: Feb 2007
Posts: 3,945
Default Cadillac throttle position sensor - TPS

The TPS is a common source of headaches but usually is within the grasp of the shadetree mechanic to diag, adjusts, replace. Problems related to the TPS often show themselves as erratic idle and stalling at stop signs.

The throttle position sensor is mounted on the end of the throttle body and tells the computer how far open or closed the throttle is. The TPS is pretty easy to understand how it work’s, it is a potentiometer just like a dimmer switch.

Voltage is fed to the TPS by the signal return circuit. As the throttle is opened the TPS directs more voltage to the ECM and less down the voltage reference circuit. All of the following items will affect the TPS:

•Throttle Cable
•Throttle Body Cleanliness / carbon bulidup
•Vacuum leaks
•Air Filter condition
•Air Filter to Throttle Body Duct
•Engine condition
•Harness and wire general condition , connectors and grounds

The TPS sensor has a great deal of influence on the fuel ratios and timing curves, because the TPS is a user interface sensor.

The TPS is the closest thing you have to a direct line into the ECM.
The ECM listens to your every command from the TPS.

There is a TPS algorithm which continuously seeks the minimum throttle angle corresponding to a CLOSED THROTTLE position. This alleviates the necessity to set the throttle position sensor at an absolute position and compensates for system changes and differences between vehicles.




 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
vpatasce
General Tech
1
05-28-2013 03:49 PM
lawnsnowguy
General Tech
0
01-10-2012 07:05 PM
lawnsnowguy
Engine Specific
0
10-21-2011 07:09 AM


Thread Tools
Search this Thread
Quick Reply: Cadillac throttle position sensor - TPS


Advertising
Featured Sponsors
Vendor Directory

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.