Notices
SC - 1st Gen (1992-2000)

Need pic to fix code 71 (resistor mod)

Thread Tools
 
Search this Thread
 
Old Sep 28, 2014 | 09:28 AM
  #1  
joe diego's Avatar
joe diego
Thread Starter
Lexus Test Driver
iTrader: (3)
 
Joined: Jun 2007
Posts: 951
Likes: 25
From: CA
Default Need pic to fix code 71 (resistor mod)

Can someone help me out and post a pic of the resistor placement in the EGR plug. I'm showing Code 71 and i think doing this will trick the ecu. I've search but i can't find a pic.
Reply
Old Sep 28, 2014 | 10:30 AM
  #2  
t2d2's Avatar
t2d2
Lead Lap
10 Year Member
Liked
Loved
Community Favorite
iTrader: (8)
 
Joined: Apr 2014
Posts: 4,767
Likes: 271
Default

No pictures, but here's my recent explanation of the process:

https://www.clublexus.com/forums/per...ml#post8711709
Reply
Old Sep 29, 2014 | 12:04 PM
  #3  
joe diego's Avatar
joe diego
Thread Starter
Lexus Test Driver
iTrader: (3)
 
Joined: Jun 2007
Posts: 951
Likes: 25
From: CA
Default

Is this the EGR harness i need to disconnect and add the resistor to?
Attached Thumbnails Need pic to fix code 71 (resistor mod)-image.jpg  
Reply
Old Sep 29, 2014 | 12:47 PM
  #4  
t2d2's Avatar
t2d2
Lead Lap
10 Year Member
Liked
Loved
Community Favorite
iTrader: (8)
 
Joined: Apr 2014
Posts: 4,767
Likes: 271
Default

That looks different than my setup. I'm guessing you have a SC300?

Wherever your EGR temperature probe is into the intake manifold, that's the plug you want to add the resistor to.

OBDII might need additional attention to tricking the valve position sensor in addition to the temperature sensor...
Reply
Old Sep 29, 2014 | 12:51 PM
  #5  
joe diego's Avatar
joe diego
Thread Starter
Lexus Test Driver
iTrader: (3)
 
Joined: Jun 2007
Posts: 951
Likes: 25
From: CA
Default

Yeah, I have an SC300(1995 OBD 1). The plug in the pic connects to the EGR so I'm guessing its the right one.
Reply
Old Sep 29, 2014 | 03:16 PM
  #6  
joe diego's Avatar
joe diego
Thread Starter
Lexus Test Driver
iTrader: (3)
 
Joined: Jun 2007
Posts: 951
Likes: 25
From: CA
Default

So, all i do is take one of these resistors, unplug the EGR cable and stick the resistor inside the plug? Also, i leave it unplugged and probably use some electrical tape to keep the resostor In place.
Attached Thumbnails Need pic to fix code 71 (resistor mod)-image.jpg  
Reply
Old Sep 29, 2014 | 05:20 PM
  #7  
t2d2's Avatar
t2d2
Lead Lap
10 Year Member
Liked
Loved
Community Favorite
iTrader: (8)
 
Joined: Apr 2014
Posts: 4,767
Likes: 271
Default

Originally Posted by joe diego
Yeah, I have an SC300(1995 OBD 1). The plug in the pic connects to the EGR so I'm guessing its the right one.
I would guess again if I were you.
Reply
Old Sep 29, 2014 | 06:46 PM
  #8  
joe diego's Avatar
joe diego
Thread Starter
Lexus Test Driver
iTrader: (3)
 
Joined: Jun 2007
Posts: 951
Likes: 25
From: CA
Default

Ok, guessing again. What I'm i doing wrong?
Reply
Old Sep 29, 2014 | 09:48 PM
  #9  
t2d2's Avatar
t2d2
Lead Lap
10 Year Member
Liked
Loved
Community Favorite
iTrader: (8)
 
Joined: Apr 2014
Posts: 4,767
Likes: 271
Default

Originally Posted by joe diego
Ok, guessing again. What I'm i doing wrong?
There are two EGR related plugs. The one you highlighted appears to be for the valve. You need to add the resistor to the one for the probe.
Reply
Old Sep 30, 2014 | 12:47 AM
  #10  
joe diego's Avatar
joe diego
Thread Starter
Lexus Test Driver
iTrader: (3)
 
Joined: Jun 2007
Posts: 951
Likes: 25
From: CA
Default

Originally Posted by t2d2
There are two EGR related plugs. The one you highlighted appears to be for the valve. You need to add the resistor to the one for the probe.
Okay gotcha, so i need to add a total of two resistors? One the probe and one for the valve?
Reply
Old Sep 30, 2014 | 08:24 AM
  #11  
t2d2's Avatar
t2d2
Lead Lap
10 Year Member
Liked
Loved
Community Favorite
iTrader: (8)
 
Joined: Apr 2014
Posts: 4,767
Likes: 271
Default

Originally Posted by joe diego
Okay gotcha, so i need to add a total of two resistors? One the probe and one for the valve?
Just one for the probe. I think only OBDII needs anything done with the other plug.
Reply
Old Oct 1, 2014 | 01:44 PM
  #12  
joe diego's Avatar
joe diego
Thread Starter
Lexus Test Driver
iTrader: (3)
 
Joined: Jun 2007
Posts: 951
Likes: 25
From: CA
Default

Here's another pic. This is the only probe/sensor wire coming from the EGR pipe. So i cut this or unplug and add the resistor to it? Correct me if I'm wrong and direct me to correct wire/harness/probe thingy.
Attached Thumbnails Need pic to fix code 71 (resistor mod)-image.jpg  
Reply
Old Oct 1, 2014 | 06:19 PM
  #13  
t2d2's Avatar
t2d2
Lead Lap
10 Year Member
Liked
Loved
Community Favorite
iTrader: (8)
 
Joined: Apr 2014
Posts: 4,767
Likes: 271
Default

Ok, I think I see where we're confused. I've read references to something connected to the EGR pipe, but that's not the case on the SC400 so I'd never seen an example of it. The SC300 must have the probe there instead of on the intake manifold like I'm used to. (Aside, I hate the confusion that results from people not specifying which model they're referring to.) So, it seems likely that you've got the correct one there and want to put the resistor on the harness side of that connector.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
RedNeckLex
SC - 1st Gen (1992-2000)
16
Oct 23, 2023 04:15 PM
SCME87
SC - 1st Gen (1992-2000)
5
Aug 25, 2012 10:01 AM
C3BlacIce
SC - 1st Gen (1992-2000)
1
May 16, 2012 06:47 AM
BK4293
ES - 1st to 6th Gen (1990-2018)
11
Apr 16, 2009 06:27 PM
tcd300
SC - 1st Gen (1992-2000)
7
Dec 13, 2008 12:54 PM




All times are GMT -7. The time now is 08:10 AM.