VSC TRAC Warning Light

Bookworm · 02-12-2004, 05:46 AM

I haven't had my 2002 4Runner Limited very long, but so far it drives like a dream. However, this morning, while driving on the Interstate, the VSC TRAC warning light went on, as well as the Malfunction Indicator Lamp. The owner's manual just says to take it to the dealer when this happens, but I was hoping to avoid this if possible. I've ordered the official Repair Manual and hope to fix some of the simpler problems myself, but I don't have the manual yet. Is this indication likely to be something I can check myself before taking it in to the shop?

Bookworm

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hillbilly · 02-12-2004, 06:52 AM

Believe me, I'm definitely one that believes in 'fixing it yourself', but this is one scenario I'd don't know that I'd mess with. If the VSC/TRAC OFF dash indicators are both on, I believe you may have a problem with the ABS (brake) actuator system. Trust me, the wiring schematic for an ABS system with VSC & A-Trac is a bit extensive.

The first thing I'd do is check the brake fluid levels in your master cylinder. If its low, top it off to the recommend level. Can't say for sure, but you may cause further damage if you continue to drive it for an extended period. Plus you may be running the risk of braking problems since both of those features (VSC/A-Trac) are all tied into the ABS system.

My nickles worth...

surf4runner · 01-21-2009, 04:15 PM

5 years later and this was the only result in the search

VSC/TRAC (ABS fault) from leaking rear axle seal = oil on sensor

wyorunner · 01-21-2009, 07:19 PM

when vsc/trac and engine malfunction lights are on, it means the fuel/air ratio sensor is bad. its the front sensor on the exhaust pipe. already had that problem on my 02 runner. went and had it scanned and thats what it came up with. so i replaced the part and wa'la it was good as new.

97ltd4x4 · 01-21-2009, 07:48 PM

Once the MIL(check engine) comes on,it will also turn on VSC TRAC warning light...This does not mean there is something wrong with the VSC/trac,it just that the ECM disables them when it goes into base programing because of the check engine light.....Need to have codes pulled,drivetrain ones in particular.

Also if you have an autozone near you,they will usually pull the codes for free for you......Write them down...p0301,ect,current and history codes..........and be nice,cause they usually think they are super diagnostic tech.

GSGALLANT · 01-22-2009, 03:58 AM

x2... get the codes read and post up the results. Other than that, all you'll get for responses are guesses.

02_Limited · 01-22-2009, 07:03 AM

Quote:

Originally Posted by GSGALLANT

x2... get the codes read and post up the results. Other than that, all you'll get for responses are guesses.

You probably need "Zero Point Recalibration". It took an hour and my dealer did it fo' free

Same thing happened to me all the time on on-ramps, even when I took 45 MPH ramps at 20. VSC is just a silly system

emptypockets · 01-22-2009, 10:12 AM

Quote:

Originally Posted by 02_Limited

Same thing happened to me all the time on on-ramps, even when I took 45 MPH ramps at 20. VSC is just a silly system

Do the Andymod traction control defeat switch and call it a day.

SWPERIC · 09-23-2009, 10:37 PM

Quote:

Originally Posted by 02_Limited

You probably need "Zero Point Recalibration". It took an hour and my dealer did it fo' free

Same thing happened to me all the time on on-ramps, even when I took 45 miles per hour ramps at 20. VSC is just a silly system

my dealer said " we dont do anything like that." i found how to do it in the FSM you friggin idiots! biggest toyota dealership in the mid west and the lead mechanic tells me they dont do this? the stealer pisses me off to no end. do i have to print their service manual and show it to them???

my concern is that there may be a band component in my system that i should replace before the recal. did everyones elses problem develop over time? mine did. it when from perfectly fine to beeping when doing 20 on a 45mph off ramp to beeping and shutting off when i am going straight down the road.

stir_fry_boy · 10-01-2009, 07:49 AM

Quote:

Originally Posted by SWPERIC

my dealer said " we dont do anything like that." i found how to do it in the FSM you friggin idiots! biggest toyota dealership in the mid west and the lead mechanic tells me they dont do this? the stealer pisses me off to no end. do i have to print their service manual and show it to them???

my concern is that there may be a band component in my system that i should replace before the recal. did everyones elses problem develop over time? mine did. it when from perfectly fine to beeping when doing 20 on a 45mph off ramp to beeping and shutting off when i am going straight down the road.

That is when I call other dealers. If they don't want the business that's fine with me.

aowRS · 03-15-2012, 06:54 AM

Quote:

Originally Posted by annasu

Connecting People.Powering the would.
turn signal lamp

What is a "would"?

Are you just making random posts on Yotatech to promote your website?

Hmm.

Andreas

02-12-2004, 06:52 AM	#2 (permalink)
hillbilly Contributing Member Personal Sales Rating: (0) Join Date: Mar 2003 Location: Lat: 40° 47' 01" Long:-78° 00' 58" Posts: 755	Believe me, I'm definitely one that believes in 'fixing it yourself', but this is one scenario I'd don't know that I'd mess with. If the VSC/TRAC OFF dash indicators are both on, I believe you may have a problem with the ABS (brake) actuator system. Trust me, the wiring schematic for an ABS system with VSC & A-Trac is a bit extensive. The first thing I'd do is check the brake fluid levels in your master cylinder. If its low, top it off to the recommend level. Can't say for sure, but you may cause further damage if you continue to drive it for an extended period. Plus you may be running the risk of braking problems since both of those features (VSC/A-Trac) are all tied into the ABS system. My nickles worth... __________________ -Scott '01 Black SR5 4x4 w/ Black Pearl's: Detroit Truetrac \| Tundra/OME 890s w/ Tokico Trekmasters \| SS Diff Drop/Panhard \| Tundra rotors/calipers \| Rear Diff Breather Extension \| Hayden cooler \| K&N \| ISR \| Deckplate \| Jet Black PC'd LC 16x8's w/ LT265/75R16 Cooper S/T's "He who wants to protect everything, protects nothing." -Lt. Gen. Adolf Galland, Luftwaffe "There is no instance of a country having benefited from prolonged warfare." -Sun Tzu, The Art of War Last edited by hillbilly; 02-12-2004 at 07:02 AM.

01-21-2009, 07:19 PM	#4 (permalink)
wyorunner Registered User Personal Sales Rating: (1) Join Date: Jun 2007 Location: Anne Arundel County, MD Posts: 434	when vsc/trac and engine malfunction lights are on, it means the fuel/air ratio sensor is bad. its the front sensor on the exhaust pipe. already had that problem on my 02 runner. went and had it scanned and thats what it came up with. so i replaced the part and wa'la it was good as new. __________________ 02 4runner Sport 4.88 LOCKED 3" OME lift + 1" 4crawler BL, Tundra Brake Upgrade, LED Gauge cluster and temp control, 285/75R16 Goodyear Wrangler MTR, H/O ARB compressor, FX45 Projectors My Profile

01-21-2009, 07:48 PM	#5 (permalink)
97ltd4x4 Registered User Personal Sales Rating: (0) Join Date: Dec 2007 Posts: 434	Once the MIL(check engine) comes on,it will also turn on VSC TRAC warning light...This does not mean there is something wrong with the VSC/trac,it just that the ECM disables them when it goes into base programing because of the check engine light.....Need to have codes pulled,drivetrain ones in particular. Also if you have an autozone near you,they will usually pull the codes for free for you......Write them down...p0301,ect,current and history codes..........and be nice,cause they usually think they are super diagnostic tech. Last edited by 97ltd4x4; 01-21-2009 at 07:51 PM.

01-22-2009, 03:58 AM	#6 (permalink)
GSGALLANT Registered User Personal Sales Rating: (0) Join Date: Mar 2005 Location: New Brunswick, Canada Posts: 1,756	x2... get the codes read and post up the results. Other than that, all you'll get for responses are guesses. __________________ 2002 4Runner, Auto-A340F, 3.4L, 4.30 Gears TJM T15 Front Bumper & Warn M8000, 4xInnovation sliders, Sonoran Steel 1.2 Lift, Toytec LCA Skids, Tundra Brake Upgrade (231mm), Extended rear diff breather, Deckplate Mod, Andymod, Dual batt setup with Optima blue top aux battery, Hardwired 1000W inverter, Aux fuse box, Full time power to 12V plugs, Yaesu FT7800R Radio, "4-air" system for airing up/down tires. 2007 FJ Cruiser - stock

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