YotaTech Forums  

Go Back   YotaTech Forums > Toyota SUV & Truck Tech > 86-95 Trucks & 4Runners
Sign in using an external account
Register Forgot Password?
Search


86-95 Trucks & 4Runners 2nd/3rd gen pickups, and 1st/2nd gen 4Runners with IFS

Welcome to Yotatech!
Welcome to Yotatech,

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!


Reply
 
LinkBack Thread Tools Search this Thread
Old 10-10-2010, 11:55 AM   #1
Registered User
Personal Sales Rating: (0)
 
Join Date: Sep 2010
Posts: 34
testing the knock sensor, OHM meter and continuity?

Using an OHM Meter, does this seem like a credible way of seeing if the actual knock sensor is working or not?

I've never used an OHM meter, so I'm not sure the idea behind continuity and it working or not.

http://www.autozone.com/autozone/rep...00c15280060e05

It says if there IS continuity, then the sensor should be replaced. What does it mean if there is continuity?

I'm replacing the knock sensor wiring, but before I rip the intake manifold off my 3.0, I'd like to be sure the sensor is working while I'm down there...

Ben
This ad is not displayed to registered members.
Register your free account today and become a member on Yotatech!
__________________
--
2000 4Runner 4x4, 3.4, 5-speed

RIP: 1995 3.0 4Runner 4x4, auto, w/ Cali emissions & 225k
benchernif is offline   Reply With Quote
Old 10-10-2010, 02:57 PM   #2
Registered User
Personal Sales Rating: (0)
 
Join Date: Dec 2006
Location: Tivoli, NY
Posts: 894
Send a message via AIM to shaeff
Best way to test is with an oscilloscope.
shaeff is offline   Reply With Quote
Old 10-10-2010, 03:10 PM   #3
Registered User
Personal Sales Rating: (0)
 
Join Date: Sep 2010
Posts: 34
How do you test it?
benchernif is offline   Reply With Quote
Old 10-10-2010, 03:23 PM   #4
Registered User
Personal Sales Rating: (0)
 
Join Date: Dec 2006
Location: Tivoli, NY
Posts: 894
Send a message via AIM to shaeff
Basically, connect the o-scope to the knock sensor and tap on the block. You should see a frequency wave on the scope.

It's a very simple test that should only take a couple minutes to complete.

Edit: I just tried testing a knock sensor from a MKIII Supra with a crappy old Wal-Mart special DVOM. I set it to the lowest voltage setting and touched the negative probe to the sensor's threads, and the positive probe to the signal connector. It showed a static voltage reading of around 20mV. When I tapped the sensor with a padlock I had laying around, that reading jumped to about 35mV, then settled back down to 20mV again. It's not the proper way, but if you don't have access to an oscilloscope I suppose it will work.

Oh, and one last thing, there should be no continuity between the ground and signal ends, obviously.

Last edited by shaeff; 10-13-2010 at 07:09 PM.
shaeff is offline   Reply With Quote
Old 10-10-2010, 03:23 PM
Yotatech
4WD Truck




Paid Advertisement
Reply

Tags
3vze, check, continuity, knock, meter, ohm, ohmmeter, read, reading, senor, sensor, test, testin, testing, toyota

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



All times are GMT -8. The time now is 04:16 PM.


2010 InternetBrands, Inc.