VSC / TRAC defeating - is anyone closer?
Dec 22, 2005 | 02:28 PM
#461
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Joined: Feb 2005
Posts: 31
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From: loveland CO
Originally Posted by aowRS
Lee,
As for a write-up, the ANDYMOD™ is actually so easy that I'll give the steps here.
Parts:
- (1) On/Off rocker switch. I used one of the standard factory foglight rocker switches (Toyota part# 550-35976).
- 8' of 18 gauge automotive wire. This is for two lengths between the switch and the master cylinder.
- (2) female spade connectors to be used at the switch
- (2) barrel connectors, crimp-on style.
- Electrical tape
- Heat shrink tubing (optional)
- Zip ties
Tools:
- Wire cutters
- Wire stripper/crimper
- Razor blade
Before doing anything on the 4Runner, I made a wiring harness using the rocker switch, spade connectors, and wiring. The actual distance from where the switch mounts .....lights go out. At this point, flip the switch and watch that the lights come on. You have now interrupted the ground for the pressure sensor connector and can operate the truck without any TRAC or VSC intervention. Flip the switch to "Off" and restart the truck. All systems should be back to normal.....
Pressure sensor connector:
"Hope that helps!
Andreas
As for a write-up, the ANDYMOD™ is actually so easy that I'll give the steps here.
Parts:
- (1) On/Off rocker switch. I used one of the standard factory foglight rocker switches (Toyota part# 550-35976).
- 8' of 18 gauge automotive wire. This is for two lengths between the switch and the master cylinder.
- (2) female spade connectors to be used at the switch
- (2) barrel connectors, crimp-on style.
- Electrical tape
- Heat shrink tubing (optional)
- Zip ties
Tools:
- Wire cutters
- Wire stripper/crimper
- Razor blade
Before doing anything on the 4Runner, I made a wiring harness using the rocker switch, spade connectors, and wiring. The actual distance from where the switch mounts .....lights go out. At this point, flip the switch and watch that the lights come on. You have now interrupted the ground for the pressure sensor connector and can operate the truck without any TRAC or VSC intervention. Flip the switch to "Off" and restart the truck. All systems should be back to normal.....
Pressure sensor connector:
"Hope that helps!
Andreas
i removed that same connector on my '03
and it did turn off the VSC but it acted a bit odd
i'm still waiting for a more complete solution for the 4th gen, cause i think VSC is more tied into the ecu than the 3rd gen
Dec 22, 2005 | 03:12 PM
#462
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Joined: Feb 2004
Posts: 320
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From: Surrey, BC, Canada
Originally Posted by LEADfoot
i found this post from way back
i removed that same connector on my '03
and it did turn off the VSC but it acted a bit odd
i'm still waiting for a more complete solution for the 4th gen, cause i think VSC is more tied into the ecu than the 3rd gen
i removed that same connector on my '03
and it did turn off the VSC but it acted a bit odd
i'm still waiting for a more complete solution for the 4th gen, cause i think VSC is more tied into the ecu than the 3rd gen
Dec 22, 2005 | 05:23 PM
#463
Thread Starter
Contributing Member
Joined: Jan 2004
Posts: 1,757
Likes: 46
From: Ellicott City, MD
Does anyone own the 4th Gen shop manuals yet? It shouldn't be that hard to track down similar wiring. I'm sure many of the basic systems carried over from the 3rd Gen.
Andreas
Andreas
Dec 22, 2005 | 10:22 PM
#464
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Joined: Feb 2004
Posts: 320
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From: Surrey, BC, Canada
I've got 3 manuals, but am not (auto) mechanical enough to correlate what you've written about 3rd Gens to what I read in the 4th Gen manuals. I'd be more than happy to scan and post PDF's of all relevant materials for someone else to discern the necessary info. Let me know, but appreciate it's a bad time of the year to find the time needed to assemble the doc.
Dec 23, 2005 | 06:58 AM
#465
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Joined: Feb 2005
Posts: 31
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From: loveland CO
yeah.. i unpluged the switch and the vcs did turn off
but part throttle wouldn't respond and not as much power at full throttle
like it was still trying to cut power...i really couldn't get it to do a burn-out
or even spin the wheels
so i think the 4th gen is going to be trickier
just my opinion though
but part throttle wouldn't respond and not as much power at full throttle
like it was still trying to cut power...i really couldn't get it to do a burn-out
or even spin the wheels
so i think the 4th gen is going to be trickier
just my opinion though
Oct 5, 2006 | 12:01 PM
#468
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Joined: Aug 2006
Posts: 945
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From: Nashville, TN
Is this still the preferred method of disabling the trac control? I too have run into the same issue you guys do and it's very frusturating.
I came across this thread when searching for a way to disable trac with a switch.
Since this thread is ancient, and all the pics of wiring diagrams are gone, I have a concern. Normally ground wires are there for a reason, to give circuit continuity. Without a ground you can have a short. I've also seen a couple of threads where people have had issues with this mod after time, which would seem to give merit to my concern.
Are those that completed this still going along fine with no issues? My concern is that disabling the ground in order to defeat the system could cause bigger problems over the long term such as causing damage to the VSC, ABS, or other ECU module associated with this system.
I came across this thread when searching for a way to disable trac with a switch.
Since this thread is ancient, and all the pics of wiring diagrams are gone, I have a concern. Normally ground wires are there for a reason, to give circuit continuity. Without a ground you can have a short. I've also seen a couple of threads where people have had issues with this mod after time, which would seem to give merit to my concern.
Are those that completed this still going along fine with no issues? My concern is that disabling the ground in order to defeat the system could cause bigger problems over the long term such as causing damage to the VSC, ABS, or other ECU module associated with this system.
Last edited by Speedy; Oct 5, 2006 at 12:02 PM.
Oct 5, 2006 | 08:07 PM
#470
Registered User
Joined: Dec 2004
Posts: 172
Likes: 0
From: Denver, CO
Is this still the preferred method of disabling the trac control? I too have run into the same issue you guys do and it's very frusturating.
I came across this thread when searching for a way to disable trac with a switch.
Since this thread is ancient, and all the pics of wiring diagrams are gone, I have a concern. Normally ground wires are there for a reason, to give circuit continuity. Without a ground you can have a short. I've also seen a couple of threads where people have had issues with this mod after time, which would seem to give merit to my concern.
Are those that completed this still going along fine with no issues? My concern is that disabling the ground in order to defeat the system could cause bigger problems over the long term such as causing damage to the VSC, ABS, or other ECU module associated with this system.
I came across this thread when searching for a way to disable trac with a switch.
Since this thread is ancient, and all the pics of wiring diagrams are gone, I have a concern. Normally ground wires are there for a reason, to give circuit continuity. Without a ground you can have a short. I've also seen a couple of threads where people have had issues with this mod after time, which would seem to give merit to my concern.
Are those that completed this still going along fine with no issues? My concern is that disabling the ground in order to defeat the system could cause bigger problems over the long term such as causing damage to the VSC, ABS, or other ECU module associated with this system.
-Simon
Oct 6, 2006 | 08:55 AM
#472
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Joined: Aug 2006
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From: Nashville, TN
I've been running that wat for about 1.5 years. Sometime I'll have the TRAC control off for months at a time and other times I'll have it on for months at a time. There was one time that it turned off (meaning TRAC off) for a while and the switch wouldn't do anything, then one day if came back on. I think it was water in the connection. Other than that no problem. I tell everyone who has a '01-'02 to do it.
-Simon
-Simon
Did anyone ever try it with the factory momentary switch? I could run some testing to see if that would work, but would rather avoid the trouble if it's been tried already.
The factory momentary switch would be ideal as the Trac system would be disabled when you hit the switch, but would automagically be re-engaged when the vehicle was restarted, which is required regardless of switch used.
Oct 8, 2006 | 09:05 AM
#474
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Joined: Dec 2004
Posts: 172
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From: Denver, CO
Excellent. Thanks for the update.
Did anyone ever try it with the factory momentary switch? I could run some testing to see if that would work, but would rather avoid the trouble if it's been tried already.
The factory momentary switch would be ideal as the Trac system would be disabled when you hit the switch, but would automagically be re-engaged when the vehicle was restarted, which is required regardless of switch used.
Did anyone ever try it with the factory momentary switch? I could run some testing to see if that would work, but would rather avoid the trouble if it's been tried already.
The factory momentary switch would be ideal as the Trac system would be disabled when you hit the switch, but would automagically be re-engaged when the vehicle was restarted, which is required regardless of switch used.
-Simon
Oct 8, 2006 | 11:16 AM
#476
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Joined: Aug 2006
Posts: 945
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From: Nashville, TN
I thought Andy used the factory switch just for looks. But in order for it to work like the way your talking about, I think you would have to put a relay in line with the switch to get it to trun off when you turn the 4runner off. I could be wrong about that though. Let us know.
-Simon
-Simon
Oct 8, 2006 | 11:19 AM
#477
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Joined: Aug 2006
Posts: 945
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From: Nashville, TN
In a regular momentary swtich, pushing the button on the switch makes a contact. In our project here, that would be like flipping the toggle switch that everyone else here has used to complete this mod. The difference is when the momentary switch is released it should be closed again.
I guess the real question is:
Is the factory momentary switch normally open, or normally closed? If normally closed, then it should work. If normally open, I don't think it will.
Oct 8, 2006 | 03:18 PM
#478
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Joined: Dec 2002
Posts: 9,048
Likes: 2
From: Seattleish, WA
You have now interrupted the ground for the pressure sensor connector and can operate the truck without any TRAC or VSC intervention.
so it sounds like you want to interrupt the ground to turn off TRAC/VSC. That would imply that the switch is NC. if not, there are plenty of NO push buttons around - or, use a latching relay and a NO switch to flip the state of the relay. Of course then you'd probably want to hang an indicator lamp in parallel on the output side to show if the relay is open (TRAC/VSC disabled) or closed (TRAC/VSC enabled).
Oct 8, 2006 | 04:59 PM
#479
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Joined: Dec 2004
Posts: 172
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From: Denver, CO
I guess you could use a button that momentairly cuts the ground connection when the button is pushed in, turning off the VSC/TRAC. So when you shut the truck off and trun it back on the VSC/TRAC would be back on. Im just not sure if its good to disconnect the ground and reconnect and leave it connect with the truck running. Does that make any sense? On a side note, my VSC/TRAC shut itself off for no apparent reason. I think its a water short.
-Simon
-Simon
Oct 8, 2006 | 05:18 PM
#480
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Joined: Aug 2006
Posts: 945
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From: Nashville, TN
I guess you could use a button that momentairly cuts the ground connection when the button is pushed in, turning off the VSC/TRAC. So when you shut the truck off and trun it back on the VSC/TRAC would be back on. Im just not sure if its good to disconnect the ground and reconnect and leave it connect with the truck running. Does that make any sense? On a side note, my VSC/TRAC shut itself off for no apparent reason. I think its a water short.
-Simon
-Simon
