IS - 3rd Gen (2014-present) Discussion about the 2014+ model IS models

BMS Stage1 piggyback not plugging into my 2018 IS300

Thread Tools
 
Search this Thread
 
Old Aug 30, 2018 | 01:56 PM
  #1  
MacroZed's Avatar
MacroZed
Thread Starter
Rookie
 
Joined: Aug 2015
Posts: 75
Likes: 16
From: SDCA
Default BMS Stage1 piggyback not plugging into my 2018 IS300

Looking for some input here...I bought the BMS Stage1 from E46CT, hoping it was just a simple plug and play...and it should be....but....

All the plugs plug right in, except for for the male end of the "rainbow" cable on the BMS harness. It will not plug into the female factory harness.

PIC:




The bottom is the factory TMAP harness / plug. The top is the male plug from the BMS harness.
The plastic guides on the BMS harness keeps the two plugs from plugging into each other.

I know that several forum members have 2018 IS300s. Did you guys run into the same issue?
And if so, how is it overcome?

It would also be super helpful if someone can take a picture of that same plug from 2018 cars where a piggyback module has been successfully installed.

Thanks in advance. I really need the help here.




Reply
Old Aug 30, 2018 | 02:01 PM
  #2  
Sasnuke's Avatar
Sasnuke
Lexus Test Driver
5 Year Member
Liked
Loved
Community Favorite
 
Joined: Feb 2017
Posts: 6,260
Likes: 1,752
From: Richmond Hill, Ontario, Canada
Default

I think you're down to 2 options:
  1. Get the connector from the year that matches the BSM plug and swap the pins over
  2. Cut off both connectors and solder the wires directly together
The first option is clearly the neatest and nicest of the two. And fairly easy to reverse as well.
Reply
Old Aug 30, 2018 | 02:09 PM
  #3  
E46CT's Avatar
E46CT
Lexus Test Driver
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Mar 2016
Posts: 9,531
Likes: 2,585
Default

Since we know all BMS are the same, we want to see other peoples 2018s stock TMAP plug (Harness end)

I talked to Flash5. He has a 2018. His BMS worked beautifully. I don't understand.
Reply
Old Aug 30, 2018 | 04:20 PM
  #4  
MacroZed's Avatar
MacroZed
Thread Starter
Rookie
 
Joined: Aug 2015
Posts: 75
Likes: 16
From: SDCA
Default

So a quick update:

I verified that my TMAP is the same as the 2016-2017 models. PN 89421-78010.
So it kind of appears that they changed / updated the harness / plug but not the sensor.
As a side note, the other MAP that I didn't have a harness / plug issue with, is also the same as the 2016-2017 models. PN 89421-78020.
Reply
Old Aug 30, 2018 | 05:55 PM
  #5  
Sheddy's Avatar
Sheddy
Racer
 
Joined: Feb 2012
Posts: 1,729
Likes: 409
From: South FL
Default

Use a bird beak/ long nose pliers and remove the white section of the top plug (BMS connector). The previous owner should be missing theirs which got stuck in there.

Last edited by Sheddy; Aug 30, 2018 at 06:07 PM.
Reply
Old Aug 30, 2018 | 06:09 PM
  #6  
MacroZed's Avatar
MacroZed
Thread Starter
Rookie
 
Joined: Aug 2015
Posts: 75
Likes: 16
From: SDCA
Default

Sheddy FTMFW!

It pulled right out.

Reply
Old Aug 30, 2018 | 06:16 PM
  #7  
Sheddy's Avatar
Sheddy
Racer
 
Joined: Feb 2012
Posts: 1,729
Likes: 409
From: South FL
Default

Enjoy!
Reply
Old Aug 30, 2018 | 07:51 PM
  #8  
mvaldez24's Avatar
mvaldez24
Rookie
 
Joined: Mar 2018
Posts: 79
Likes: 8
From: Arizona
Default

Is that white piece not suppose to be there in the BMS side connector?
Reply
Old Aug 30, 2018 | 08:35 PM
  #9  
Sheddy's Avatar
Sheddy
Racer
 
Joined: Feb 2012
Posts: 1,729
Likes: 409
From: South FL
Default

Originally Posted by mvaldez24
Is that white piece not suppose to be there in the BMS side connector?
The white piece should only be present in the female connector and not the male.
Reply
Old Aug 30, 2018 | 09:03 PM
  #10  
mvaldez24's Avatar
mvaldez24
Rookie
 
Joined: Mar 2018
Posts: 79
Likes: 8
From: Arizona
Default



This is how mine looks. I had a little white piece fall out the other day when I disconnected it. Dropped in the engine bay. Couldn't reach for it.
Originally Posted by Sheddy
The white piece should only be present in the female connector and not the male.
Reply
Old Aug 30, 2018 | 09:16 PM
  #11  
mvaldez24's Avatar
mvaldez24
Rookie
 
Joined: Mar 2018
Posts: 79
Likes: 8
From: Arizona
Default




Managed to grab it just now. This is actually mine from my female connector. First time I connected it wouldn't snap in. It would plug and slide in but didn't snap into the tab. When I unplugged it this piece fell out but when I plugged it back in, now without this piece, it still wouldn't snap in. Should it lock into the tab?
Reply
Old Aug 30, 2018 | 09:46 PM
  #12  
Flash5's Avatar
Flash5
Pole Position
5 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2018
Posts: 2,626
Likes: 459
From: GA
Default

Weird I didn’t have any issues. Did BMS change the connector at some point? I know my tuner had the protective case already vs others who bought it earlier and it didn’t come with a protective case. Pretty interesting.

EDIT: I just realized what is going on haha. I can’t believe E46CT’s little plastic piece was stuck in that connector lol. Well glad Sheddy cleared this all up!

Last edited by Flash5; Aug 30, 2018 at 10:02 PM.
Reply
Old Aug 31, 2018 | 04:45 AM
  #13  
Sheddy's Avatar
Sheddy
Racer
 
Joined: Feb 2012
Posts: 1,729
Likes: 409
From: South FL
Default

Originally Posted by mvaldez24
Managed to grab it just now. This is actually mine from my female connector. First time I connected it wouldn't snap in. It would plug and slide in but didn't snap into the tab. When I unplugged it this piece fell out but when I plugged it back in, now without this piece, it still wouldn't snap in. Should it lock into the tab?
It should be able to snap in, but it's also fine if you take it off. I would much rather it lock into position.
Reply
Old Aug 31, 2018 | 09:16 AM
  #14  
ZISF's Avatar
ZISF
Driver School Candidate
 
Joined: Sep 2017
Posts: 49
Likes: 5
From: Ontario
Default

I'm confused. Why the bms stage 1 if our cars don't have any boost (300/350)
Reply
Old Aug 31, 2018 | 09:17 AM
  #15  
Flash5's Avatar
Flash5
Pole Position
5 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2018
Posts: 2,626
Likes: 459
From: GA
Default

Originally Posted by ZISF
I'm confused. Why the bms stage 1 if our cars don't have any boost (300/350)
The 2018 IS 300 RWD is the 200t they renamed it.
Reply



All times are GMT -7. The time now is 12:00 PM.