Alternator Problem?

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Sep 29, 2017 | 02:03 PM

#16

Joker4096

Instructor

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From: Florida

Is the new alternator charging correctly? I know remans are hit and miss.

Sep 29, 2017 | 02:13 PM

#17

Rickna

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From: ConnectiTAX

Quote:

Originally Posted by Joker4096

Is the new alternator charging correctly? I know remans are hit and miss.

I've had it for over 2 yrs. No problems so far...

Sep 29, 2017 | 04:09 PM

#18

2013FSport

Lexus Test Driver

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From: OR

I didn't spend a lot of time looking but a bunch lex and yodas use an overrun clutch on the alternator which can and does fail often.
If yours has a plastic cover at the pulley pop it off and verify the shaft is indeed spinning with the pulley while engine is running.
IS#50, GS, and a bunch of others have it and when it fails the alt output can vary substantially or be zero and many don't notice its a mechanical failure of the drive vs a fault inside the Alt itself.

Oct 1, 2017 | 06:14 PM

#19

lobuxracer

Tech Resource

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From: Georgia

Quote:

Originally Posted by 2013FSport

The IS F also has a one way clutch on the drive.

Jun 18, 2019 | 04:55 AM

#20

Evogixer

10th Gear

Joined: Jan 2019

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From: Wiltshire

Quote:

Originally Posted by Rickna

So, on my 09 ISF w/20k mi I replaced the battery on 10/14. Now, about every 2 weeks the batt goes dead. I had it tested-it's ok. I also had the system load tested at Auto zone. It showed the alternator not fully charging. Hard to believe the alt has failed with such low mileage. Any ideas?

I'm in exactly the same situ, '12 F with 16k mls. Reading 13.4v irrespective of engine speed. Not too uncommon a problem it seems.