User Tag List

Reply
 
Thread Tools Rate Thread Display Modes
Old 05-02-2024, 10:10 AM #1
Waterman2112's Avatar
Waterman2112 Waterman2112 is offline
Member
 
Join Date: Nov 2014
Location: Long Island, NY
Age: 62
Posts: 53
Waterman2112 is on a distinguished road
Waterman2112 Waterman2112 is offline
Member
Waterman2112's Avatar
 
Join Date: Nov 2014
Location: Long Island, NY
Age: 62
Posts: 53
Waterman2112 is on a distinguished road
Alternator Issues 2015 Trail Edition

Any ideas around alternator intermittences…?

Some slow cranking issues… had the original battery. Thought it was time.. checked alternator output and checked with Vector unit.. all seemed good.
No light on the dash with regards to charging..

New battery lasted for 6 months or so… then slow cranking again. No light on dash. The photos show the Vector charging unit hooked up.. about 14.5 volts and about 15 amps or so… used “alt check” function and diagnostic read was “good.”

Is it possible that the alternator is cutting off when hot or some other issue causing intermittent function..? Is there some other diagnostic route I should employ..?
Attached Images
Alternator Issues 2015 Trail Edition-img_2736-jpg  Alternator Issues 2015 Trail Edition-img_2737-jpg 
__________________
2015 Trail | Attitude Black | Toytec Boss Front @ 2.00" | Camburg UCAs | Icon Shifters | Weather Tech | Cooper AT3 LT275/70R17 - C Load. | Sway-a-way Rear Springs 1.5" | 5100 Rear Dampers. | Spiders 1.25
Waterman2112 is offline   Reply With QuoteReply With Quote
Old 05-02-2024, 10:26 AM #2
Captain Planet's Avatar
Captain Planet Captain Planet is offline
Member
 
Join Date: Nov 2019
Location: NJ
Posts: 134
Captain Planet will become famous soon enough Captain Planet will become famous soon enough
Captain Planet Captain Planet is offline
Member
Captain Planet's Avatar
 
Join Date: Nov 2019
Location: NJ
Posts: 134
Captain Planet will become famous soon enough Captain Planet will become famous soon enough
Parasitic load draining the battery?

Check the battery voltage with a multimeter at night, then again in the morning.

Maybe clean the terminals.

I had an alternator go at about 70k on mine, dealer covered it and the battery under warranty. Wasn't slow cranking though.

See if you can see/hear arcing in the alternator when it's running.

Last edited by Captain Planet; 05-02-2024 at 10:28 AM.
Captain Planet is offline   Reply With QuoteReply With Quote
Old 05-02-2024, 11:40 AM #3
fkheath fkheath is offline
Senior Member
 
Join Date: Sep 2020
Location: Utah
Posts: 1,406
fkheath is a splendid one to behold fkheath is a splendid one to behold fkheath is a splendid one to behold fkheath is a splendid one to behold fkheath is a splendid one to behold fkheath is a splendid one to behold
fkheath fkheath is offline
Senior Member
 
Join Date: Sep 2020
Location: Utah
Posts: 1,406
fkheath is a splendid one to behold fkheath is a splendid one to behold fkheath is a splendid one to behold fkheath is a splendid one to behold fkheath is a splendid one to behold fkheath is a splendid one to behold
Quote:
Originally Posted by Waterman2112 View Post
Any ideas around alternator intermittences…?

Some slow cranking issues… had the original battery. Thought it was time.. checked alternator output and checked with Vector unit.. all seemed good.
No light on the dash with regards to charging..

New battery lasted for 6 months or so… then slow cranking again. No light on dash. The photos show the Vector charging unit hooked up.. about 14.5 volts and about 15 amps or so… used “alt check” function and diagnostic read was “good.”

Is it possible that the alternator is cutting off when hot or some other issue causing intermittent function..? Is there some other diagnostic route I should employ..?
Forget the alternator, it is good. Your problem is the battery.

What is the battery voltage just prior to trying to start the car? It should be 12 volts or a bit more. If less, either something is draining the battery, or the battery is not keeping a charge.

Suggest you get one of those cheap digital voltage displays that plug into the 12 volt outlet. That will show the battery voltage anytime the car is on. If you really have an intermittent alternator, that will show immediately on that voltage display as something below the nominal 14 charging voltage.

Just keep in mind that any voltage over the resting voltage of the battery will still charge the battery.
fkheath is offline   Reply With QuoteReply With Quote
Old 05-02-2024, 01:09 PM #4
Waterman2112's Avatar
Waterman2112 Waterman2112 is offline
Member
 
Join Date: Nov 2014
Location: Long Island, NY
Age: 62
Posts: 53
Waterman2112 is on a distinguished road
Waterman2112 Waterman2112 is offline
Member
Waterman2112's Avatar
 
Join Date: Nov 2014
Location: Long Island, NY
Age: 62
Posts: 53
Waterman2112 is on a distinguished road
I rechecked when the vehicle was at operating temperature… plugged the Vector charger up and rechecked with the alternator diagnostic button… it showed “alt good” then went back to battery voltage with the vehicle still running… it showed 14.7 volts and 15.5 amps.. THEN.. right then and there the amp screen went blank.. pushing again on the voltage button the volts were 13.5 volts (if you push that button again it toggles to amps)… NO amps displayed.. it didn’t even say zero amps.. it just didn’t display anything for amps…. Then hit the alternator test button.. it displayed a blinking alt icon and a triangle with a (!) in the middle of it… bad alternator…

So it seems my alternator is working some of the time but probably not working most of the time… weird… I guess that’s the way they fail..? Intermittent… then complete…? Probably so..

I checked out a couple of YouTube videos on changing the alternator… seems straightforward with some tight bolts on a back bracket assembly… the last 8 numbers on my VIN say it’s a 130amp type (2 choices for the Runner it seems at 100amp and 130amp) probably a good time to change the serpentine belt..

Just want to see if I was missing something… Any advice on additional checks are very much appreciated.
__________________
2015 Trail | Attitude Black | Toytec Boss Front @ 2.00" | Camburg UCAs | Icon Shifters | Weather Tech | Cooper AT3 LT275/70R17 - C Load. | Sway-a-way Rear Springs 1.5" | 5100 Rear Dampers. | Spiders 1.25
Waterman2112 is offline   Reply With QuoteReply With Quote
Reply

Tags
alternator , charging , dash , diagnostic , light

Thread Tools
Display Modes Rate This Thread
Rate This 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
2015 Trail with Sunroof Issues SirWilliamGoes 5th gen T4Rs 31 02-15-2017 06:49 PM
WTS 2015 Trail Edition Wheels ToyoSurf For Sale: Suspension/Wheels/Tires 14 10-21-2016 12:51 PM
WTB ONE trail edition rim 2015+ pokits For Sale: Suspension/Wheels/Tires 0 04-06-2016 03:00 PM
2015 Trail Edition standard undignified 5th gen T4Rs 18 07-28-2015 09:42 PM
JUST bought a 2015 Trail Edition.. pokits 5th gen T4Rs 2 03-16-2015 02:56 AM

Powered by vBadvanced CMPS v3.2.2

All times are GMT -4. The time now is 07:33 PM.

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
 
Copyright © 2020