Home Menu

Site Navigation


Toyota 4Runner Forum - Largest 4Runner Forum > > > Tachometer reading low
User Tag List

Reply
 
Thread Tools Rate Thread Display Modes
Old 06-26-2012, 10:25 PM #1
machine_51 machine_51 is offline
Member
  
Join Date: Jan 2010
Location: Milwaukee, WI
Posts: 30
machine_51 is on a distinguished road
machine_51 machine_51 is offline
Member
 
Join Date: Jan 2010
Location: Milwaukee, WI
Posts: 30
machine_51 is on a distinguished road
Tachometer reading low
After missing my 97 I finally got back into another T4R. This last week I picked up a '04 SR5 V6 with 84k miles on it. The truck is in amazing shape, loving it right now. The other day when I was driving home I noticed that my tach was reading 0 at the stop sign. It will rise when I step on the gas and drop when I let off. When I put it in neutral it would be sitting around 300 rpm and then drop to 0 when I put it back in gear. Has anyone seen this? The engine is smooth and everything is working like it should. Just hoping this isn't a early sign of something big.
machine_51 is offline   Reply With QuoteReply With Quote
Old 06-27-2012, 01:06 PM #2
DC runner DC runner is offline
Senior Member
  
Join Date: Aug 2011
Location: TN
Posts: 1,518
DC runner is on a distinguished road
DC runner DC runner is offline
Senior Member
 
Join Date: Aug 2011
Location: TN
Posts: 1,518
DC runner is on a distinguished road
At 0, that engine would be sputtering to all heck.
So, is the engine running smooth the entire time? If so, its the sensor or wire.
DC runner is offline   Reply With QuoteReply With Quote
Old 06-27-2012, 10:54 PM #3
cabowally cabowally is offline
Member
  
Join Date: May 2011
Location: MX
Posts: 317
cabowally is on a distinguished road
cabowally cabowally is offline
Member
 
Join Date: May 2011
Location: MX
Posts: 317
cabowally is on a distinguished road
The FSM has very specific instructions as to how to diagnose this issue.

It's either the cluster, harness, connector or ECM.

You need an oscilloscope to test it.









..
cabowally is offline   Reply With QuoteReply With Quote
Old 06-29-2012, 07:21 PM #4
machine_51 machine_51 is offline
Member
  
Join Date: Jan 2010
Location: Milwaukee, WI
Posts: 30
machine_51 is on a distinguished road
machine_51 machine_51 is offline
Member
 
Join Date: Jan 2010
Location: Milwaukee, WI
Posts: 30
machine_51 is on a distinguished road
The engine runs as smooth as my ex's 06 Tacoma's 4.0L. There is no hesitation, or flat spots in the rpm so I believe it to be in the gage. The rpm's are reading 1300 at 60 mph too. Not sure if that I what a typical 04 V6 will run. I was wondering if that was a normal for the 4-speed.

I'll check the FSM this weekend and see what I find out. Thanks.
Last edited by machine_51; 06-29-2012 at 07:24 PM.
machine_51 is offline   Reply With QuoteReply With Quote
Old 06-29-2012, 08:07 PM #5
machine_51 machine_51 is offline
Member
  
Join Date: Jan 2010
Location: Milwaukee, WI
Posts: 30
machine_51 is on a distinguished road
machine_51 machine_51 is offline
Member
 
Join Date: Jan 2010
Location: Milwaukee, WI
Posts: 30
machine_51 is on a distinguished road
Quote:
Originally Posted by cabowally View Post
The FSM has very specific instructions as to how to diagnose this issue.

..
Do you know where in the FSM it tells this. I looked in an 03 FSM and did not see anything. Do you have a page number that I can reference, maybe I'm in the wrong part since it is in 100 different .pdf files.
machine_51 is offline   Reply With QuoteReply With Quote
Old 06-29-2012, 09:44 PM #6
Exploresystems Exploresystems is offline
Junior Member
  
Join Date: Jun 2012
Posts: 15
Exploresystems is on a distinguished road
Exploresystems Exploresystems is offline
Junior Member
 
Join Date: Jun 2012
Posts: 15
Exploresystems is on a distinguished road
Interesting...I have an 04 V6. The tach will fluctuate up and down when on a road trip. I believe mine is in he gauge too, everything else seems to function properly. Interested in the out come.
Exploresystems is offline   Reply With QuoteReply With Quote
Old 06-29-2012, 09:52 PM #7
cabowally cabowally is offline
Member
  
Join Date: May 2011
Location: MX
Posts: 317
cabowally is on a distinguished road
cabowally cabowally is offline
Member
 
Join Date: May 2011
Location: MX
Posts: 317
cabowally is on a distinguished road
Running out and don't have time to sift through the FSM. Pulled this info from alldatadiy for a 2007 V8. Should be the same, I think.


Tachometer Malfunction


Tachometer Malfunction

DESCRIPTION

When turn the ignition switch to the ON position, the combination meter assembly communicates with the ECM by the direct line.


GOOD LUCK!
Attached Images
Tachometer reading low-13531705-1-gif  Tachometer reading low-13531705-2-gif  Tachometer reading low-13531705-3-gif 
Last edited by cabowally; 06-29-2012 at 10:07 PM.
cabowally is offline   Reply With QuoteReply With Quote
Old 06-30-2012, 09:38 AM #8
machine_51 machine_51 is offline
Member
  
Join Date: Jan 2010
Location: Milwaukee, WI
Posts: 30
machine_51 is on a distinguished road
machine_51 machine_51 is offline
Member
 
Join Date: Jan 2010
Location: Milwaukee, WI
Posts: 30
machine_51 is on a distinguished road
Awesome! I'll try this and see what I can come up with and hopefully post something soon. Thanks for all the help!
machine_51 is offline   Reply With QuoteReply With Quote
Old 07-05-2012, 10:36 AM #9
machine_51 machine_51 is offline
Member
  
Join Date: Jan 2010
Location: Milwaukee, WI
Posts: 30
machine_51 is on a distinguished road
machine_51 machine_51 is offline
Member
 
Join Date: Jan 2010
Location: Milwaukee, WI
Posts: 30
machine_51 is on a distinguished road
So I dug out an old scope from my work and hooked it up. I get the squarewave form that I'm supposed to get so it tells me to replace the combination meter assembly. But then I tested the wiring harness/connectors for continuity and there is none, which there should be. So now I'm not sure if I just cannot get a good connection with my leads to show continuity. Thanks again for all the help cabowally.
Last edited by machine_51; 07-05-2012 at 10:46 AM.
machine_51 is offline   Reply With QuoteReply With Quote
Old 07-06-2012, 04:53 AM #10
20034RunnerV84x2's Avatar
20034RunnerV84x2 20034RunnerV84x2 is offline
Senior Member
  
Join Date: Oct 2011
Location: Atlanta, Georgia
Posts: 1,757
Real Name: Allen
20034RunnerV84x2 is an unknown quantity at this point
20034RunnerV84x2 20034RunnerV84x2 is offline
Senior Member
20034RunnerV84x2's Avatar
 
Join Date: Oct 2011
Location: Atlanta, Georgia
Posts: 1,757
Real Name: Allen
20034RunnerV84x2 is an unknown quantity at this point
Check the fuse for the gauges under your left foot. Maybe its in the wiring under there? Possibly a loose wire that sometimes gets power and sometimes doesn't?
__________________
2003 Toyota 4Runner SR5 iForce 4.7L V8 2WD Natural White With Plastic Bumper Cladding, Everything Completely Stock.
Owned since 10/3/11
90,000 Miles and counting!
20034RunnerV84x2 is offline   Reply With QuoteReply With Quote
Reply

« Previous Thread | Next Thread »

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 On
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Tachometer bubbles BeerRunner 3rd gen T4Rs 3 04-05-2009 12:48 AM
tachometer gimpey03 3rd gen T4Rs 1 06-04-2008 09:33 AM
Installing a new tachometer sleepy88 Classic T4Rs 7 01-13-2007 12:52 AM
Installing a tachometer in a 1st gen eightnine Classic T4Rs 2 12-30-2006 01:37 PM
Tachometer Question Razorback 3rd gen T4Rs 1 12-15-2006 01:20 AM

» Follow Us!!!
» Log in
User Name:

Password:

Not a member yet?
Register Now!
Powered by vBadvanced CMPS v3.2.2

All times are GMT -4. The time now is 07:11 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2024 DragonByte Technologies Ltd.
Feedback Buttons provided by Advanced Post Thanks / Like (Lite) - vBulletin Mods & Addons Copyright © 2024 DragonByte Technologies Ltd.
User Alert System provided by Advanced User Tagging (Lite) - vBulletin Mods & Addons Copyright © 2024 DragonByte Technologies Ltd.
***This site is an unofficial Toyota site, and is not officially endorsed, supported, authorized by or affiliated with Toyota. All company, product, or service names references in this web site are used for identification purposes only and may be trademarks of their respective owners. The Toyota name, marks, designs and logos, as well as Toyota model names, are registered trademarks of Toyota Motor Corporation***Ad Management plugin by RedTyger
 
Toyota - 4Runner . org Forum Terms and Privacy Policy
Copyright © 2020