In this video I will show you how to test a power door lock circuit using just a voltmeter and a test light. The procedures shown in this video can be applied to all types of computer controlled door lock circuits, not just Subaru.

Engine Performance Diagnostics chapter 2

test shown enh 50

  • how to determine circuit design with a voltmeter and wiring diagram
  • how to perform a switch input bypass test
  • what is the difference between a switch input and a conventional switch

end faq

Playlist

(Chapter 2) Switch Inputs, digital signals, module communication, hall effect testing

Related videos:

Switch Input Identification Variables:

Honda VTEC System Testing (P1259 trouble code):

Electronic Switch Inputs (a free ScannerDanner Premium video):

Section 2 "Classroom Lecture" preview (an SD Premium video):

end faq


For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available as an eBook or paper book.

Want even more diagnostic training? Whether you are a DIY trying to fix your own car, someone looking to become an auto technician, or a current auto technician that wants to get more into diagnostics, subscribe to ScannerDanner Premium. There is a 14 day free trial.

On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. What is so special about these classroom case studies? I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere!

 

You have no rights to post comments

Comments   

0 #2 ScannerDanner 2018-01-28 11:40
Quoting Taylor:
switch input design I believe is the key to understanding how to work on these systems. Actually any computer controlled system. By identifying the design you in turn understand it's logic and can see the function in real time. So important to master especially when you want to eliminate all the guess work practices of the past. In fact as a tech your confidence will be increased in your ability to attack whatever may come through the door. Understanding the design is a great 1st step to success!
Thanks

Exactly Taylor! Thank you
0 #1 Taylor 2018-01-28 10:31
switch input design I believe is the key to understanding how to work on these systems. Actually any computer controlled system. By identifying the design you in turn understand it's logic and can see the function in real time. So important to master especially when you want to eliminate all the guess work practices of the past. In fact as a tech your confidence will be increased in your ability to attack whatever may come through the door. Understanding the design is a great 1st step to success!
Thanks