Hybrid Technology Unique topics related to the GS450H model hybrid drivetrain and other features/options found only on the GS450H. Please use the main 4GS forum for discussion about shared components with other fourth generation GS models.

Is Dr. Prius worth getting for a Toyota/Lexus Hybrid Owner?

Thread Tools
 
Search this Thread
 
Old 01-05-22, 02:55 PM
  #1  
bclexus
Lexus Test Driver
Thread Starter
 
bclexus's Avatar
 
Join Date: Nov 2014
Location: Texas
Posts: 9,348
Received 2,181 Likes on 1,563 Posts
Question Is Dr. Prius worth getting for a Toyota/Lexus Hybrid Owner?

Is Dr. Prius/Dr. Hybrid worth getting for a Toyota/Lexus hybrid owner? Or is it best to forget about trying to analyze the traction battery's health and just drive the vehicle?

Last edited by bclexus; 01-05-22 at 02:59 PM.
Old 01-06-22, 07:39 AM
  #2  
peasodos
Lexus Test Driver
iTrader: (1)
 
peasodos's Avatar
 
Join Date: Feb 2017
Location: USA
Posts: 5,523
Received 2,229 Likes on 1,450 Posts
Default

Just drive the damn thing. Unless your over 220k miles you have nothing to worry about with the hybrid battery.
The following 2 users liked this post by peasodos:
Im2bz2p345 (01-06-22), jgscott (01-06-22)
Old 01-07-22, 04:58 PM
  #3  
703
Lead Lap
 
703's Avatar
 
Join Date: Aug 2001
Posts: 3,774
Received 783 Likes on 532 Posts
Default

No, no worth getting. You can’t tell when a hybrid battery is going to fail by monitoring voltage blocks. However if you really care, you should data log the temperature of the batteries to ensure the cooling is in good order.

Old 01-21-22, 12:16 PM
  #4  
spineman
Pit Crew
 
spineman's Avatar
 
Join Date: Oct 2017
Location: DE
Posts: 147
Received 30 Likes on 24 Posts
Default

Peasodos is correct. I used it to scan a car I was going to buy, it scared me didn't buy it at first, then drove all the way bck to CT to buy it. No issues and I won't run it again because I really don't want to know now lol
Old 01-21-22, 06:59 PM
  #5  
703
Lead Lap
 
703's Avatar
 
Join Date: Aug 2001
Posts: 3,774
Received 783 Likes on 532 Posts
Default

Dr Prius monitor screen is free. The other functions are paid features.

You can just download it for free and take a look at the voltage spread and the resistance while driving.

Here is one I took of my RX450h.





I wouldn’t pay for it. Very unstable and keeps crashing.
Old 08-30-22, 11:09 AM
  #6  
spineman
Pit Crew
 
spineman's Avatar
 
Join Date: Oct 2017
Location: DE
Posts: 147
Received 30 Likes on 24 Posts
Default

Has anyone had their hybrid battery "reconditioned" for longer life? I found a place besthybrid.com said they would do it for under $700. Shipping by freight would be $400 and they would replace any bad cells for $50
Old 08-31-22, 01:03 AM
  #7  
703
Lead Lap
 
703's Avatar
 
Join Date: Aug 2001
Posts: 3,774
Received 783 Likes on 532 Posts
Default

Originally Posted by spineman
Has anyone had their hybrid battery "reconditioned" for longer life? I found a place besthybrid.com said they would do it for under $700. Shipping by freight would be $400 and they would replace any bad cells for $50
I wouldn’t go and perform surgery on the battery pack. Your hybrid ECU is actually conditioning the pack all the time by changing and discharging the cells.

The only preventative maintenance I would do is to ensure the battery fans are free of dust and hair for optimal cooling. As heat kills.

Old 08-31-22, 06:24 AM
  #8  
spineman
Pit Crew
 
spineman's Avatar
 
Join Date: Oct 2017
Location: DE
Posts: 147
Received 30 Likes on 24 Posts
Default

Ok. I'll stop thinking about it. I would like to check on how dirty my cooling system is, as I am over 100k now. Do you have to remove seat or can you get to it from trunk?

Sorry to be off topic, but have you guys changed your coolant/inverter at 100k? (if you are there yet) I was thinking of getting the test strips.

How many miles do you guys have now? I haven't seen a post if anyone has had to change out the battery pack yet on 4th Gen. I did check on the price though. Refurb are hard to find at this time. They want $3500 for refurb and Dealer $6k

Last edited by spineman; 08-31-22 at 06:32 AM.
Old 08-31-22, 06:37 AM
  #9  
peasodos
Lexus Test Driver
iTrader: (1)
 
peasodos's Avatar
 
Join Date: Feb 2017
Location: USA
Posts: 5,523
Received 2,229 Likes on 1,450 Posts
Default

Originally Posted by spineman
Ok. I'll stop thinking about it. I would like to check on how dirty my cooling system is, as I am over 100k now. Do you have to remove seat or can you get to it from trunk?

Sorry to be off topic, but have you guys changed your coolant/inverter at 100k? (if you are there yet) I was thinking of getting the test strips.
I plan on changing mine at 150k miles as per the service manual maintenance schedule, my cars at 124k miles. No sense in changing it early for no reason, there is no test strip and whatever is in the reservoir is always going to look nice and pink.
Old 08-31-22, 06:45 AM
  #10  
peasodos
Lexus Test Driver
iTrader: (1)
 
peasodos's Avatar
 
Join Date: Feb 2017
Location: USA
Posts: 5,523
Received 2,229 Likes on 1,450 Posts
Default

Here are the instructions on how to change the inverter coolant.






The following users liked this post:
spineman (08-31-22)
Old 08-31-22, 11:34 AM
  #11  
spineman
Pit Crew
 
spineman's Avatar
 
Join Date: Oct 2017
Location: DE
Posts: 147
Received 30 Likes on 24 Posts
Default

Thank you so much peasodos! Could you possibly post the engine coolant instructions as well? Doesn't say on maintenance schedule when to change that, but everyone seems to concur 100k
Old 09-01-22, 01:30 AM
  #12  
JGB93
Rookie
 
JGB93's Avatar
 
Join Date: Oct 2020
Location: British Columbia
Posts: 34
Received 24 Likes on 15 Posts
Default

Still in the distant future, but would anyone consider getting a Lithium ion traction battery upgrade when yours gives out? A lot lighter +more energy dense.
Hopefully vehicle programing will utilize it.

Been a few prius conversions lately + new gen Toyotas are coming out with them . Results look promising

Same with the 12V Battery. there's a brand called AntiGravity batteries, super light batteries like 5-15lb, mainly for race cars. I'd consider it if they have a model that can support the load our vehicles need - haven't browsed their catalog yet.

Future maintenance planning
Old 09-01-22, 12:52 PM
  #13  
ratobuza
Rookie
 
ratobuza's Avatar
 
Join Date: Sep 2012
Location: ON
Posts: 49
Received 33 Likes on 13 Posts
Default

Originally Posted by spineman
Ok. I'll stop thinking about it. I would like to check on how dirty my cooling system is, as I am over 100k now. Do you have to remove seat or can you get to it from trunk?

Sorry to be off topic, but have you guys changed your coolant/inverter at 100k? (if you are there yet) I was thinking of getting the test strips.

How many miles do you guys have now? I haven't seen a post if anyone has had to change out the battery pack yet on 4th Gen. I did check on the price though. Refurb are hard to find at this time. They want $3500 for refurb and Dealer $6k
I just changed both the main ICE coolant and the Inverter coolant @ 165k km aporox 103k miles- in Canada Lexus dealers claim both have to be changed at 160k km
Old 09-01-22, 08:04 PM
  #14  
ratobuza
Rookie
 
ratobuza's Avatar
 
Join Date: Sep 2012
Location: ON
Posts: 49
Received 33 Likes on 13 Posts
Default

Originally Posted by bclexus
Is Dr. Prius/Dr. Hybrid worth getting for a Toyota/Lexus hybrid owner? Or is it best to forget about trying to analyze the traction battery's health and just drive the vehicle?
I found it worth buying - monitoring is pretty cool and shows real-time info on pack voltage, you can see the module balancing algorithm and other info like instant charge and discharge current, module voltage, battery charge level (% and horsepower), etc. The battery life expectancy takes about 15min you first charge the battery for about 1 min then discharge at relatively low current 3-5A
See attached video I shot while driving in the city you can see all of the above, regen braking charge, acceleration discharge and in the final 30-60s EV-only driving with more discharge
Attached Files
File Type: avi
Dr PRIUS.avi (18.98 MB, 48 views)

Last edited by ratobuza; 09-01-22 at 08:10 PM.
The following 3 users liked this post by ratobuza:
Im2bz2p345 (09-01-22), spineman (09-06-22), ThreeCW (01-19-23)
Old 09-06-22, 11:23 AM
  #15  
spineman
Pit Crew
 
spineman's Avatar
 
Join Date: Oct 2017
Location: DE
Posts: 147
Received 30 Likes on 24 Posts
Default

Originally Posted by JGB93
Still in the distant future, but would anyone consider getting a Lithium ion traction battery upgrade when yours gives out? A lot lighter +more energy dense.
Hopefully vehicle programing will utilize it.

Been a few prius conversions lately + new gen Toyotas are coming out with them . Results look promising

Same with the 12V Battery. there's a brand called AntiGravity batteries, super light batteries like 5-15lb, mainly for race cars. I'd consider it if they have a model that can support the load our vehicles need - haven't browsed their catalog yet.

Future maintenance planning
Lol

From what I have read, Lithium just won't work right in our cars long term. There would have to be a totally different charging system and algorithm.
The following users liked this post:
Im2bz2p345 (09-07-22)


Quick Reply: Is Dr. Prius worth getting for a Toyota/Lexus Hybrid Owner?



All times are GMT -7. The time now is 08:51 AM.