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Toyota Camry Traction Control

11 messages,  Last post on Jun 04, 2008 at 8:39 PM

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#4 of 11 Re: Traction Control [schroeder2] by wwest Feb 02, 2008 (3:24 pm)
Replying to: schroeder2 (Feb 02, 2008 1:23 pm) TC, Traction Control, and VSC, Vehicle Stability Control, serve two separate and indendent functions.   TC is used to abate wheelspin/slip that is the result of the driver using too much throttle for existing traction conditions. On a FWD vehicle TC is set to have HIGH sensitivity, QUICK reacting, since loss of traction on the driven wheels can also result quickly in loss of directional control.   TC will apply braking to both front wheels even if only one is slipping and will simultaneously dethrottle the engine so as to prevent subsequent rotor warpage resulting from brake overheating.   Before you resort to disabling TC you should always first try to get out of the situation by learning to "feather" the throttle yourself right up to the point of loss of traction but not beyond.   The simplest way to disable TC & VSC is to disconnect the MAF/IAT module while the engine is idling. The engine will stop, reconnect the MAF/IAT, restart the engine. You will now have a CEL (and by default a TC/VSC fault) for the next few drive cycles and meanwhile the TC system will be disabled. Replies to this message: gene22 (May 07, 2008 8:13 pm)
#5 of 11 Re: Traction Control [schroeder2] by kiawah Feb 02, 2008 (3:56 pm)
Replying to: schroeder2 (Feb 02, 2008 1:23 pm) to disengage VSC:   1.) start the car with parking/emerg brake on. 2.) all within 30 seconds, depress and release the brake pedal twice. 3.) immediately, de-activate and re-engage the parking/emerg brake twice. 4.) the VSC/trac light on the dash will light....the VSC/trac is now deactivated until you re-start the car.   Print these and store in your glove compartment
#6 of 11 Re: Traction Control [wwest] by gene22 May 07, 2008 (8:13 pm)
Replying to: wwest (Feb 02, 2008 3:24 pm) The above process did not work on my 2007 Camry V6 XLE. But I found the following elsewhere on the forums that did work. I have a weird braking issue and want to see if it is the VSC)   Once the car is started, you have thirty seconds to complete the process. With practice, the procedure can be completed in approximately fifteen seconds but, unfortunately, must be repeated each time the car is switched off.    1. Make sure the car is in Park and the parking brake is disengaged before you start the car. 2. Start the engine. 3. Engage the parking brake. 4. Fully depress the brake pedal and then release. 5. Fully depress the brake pedal and then release. 6. Disengage the parking brake. 7. Fully depress and hold down the brake pedal. 8. Engage the parking brake, then disengage it (while holding down the brake pedal). 9. Engage the parking brake, then disengage it (while holding down the brake pedal). 10. Release the brake pedal. 11. Engage the parking brake. 12. Fully depress the brake pedal and then release. 13. Fully depress the brake pedal and then release.    When “Check VSC” is displayed in the multifunction display along with the “Trac-off” icon indicator, you’ll know that you have successfully completed the procedure.
#7 of 11 Or... by wwest May 08, 2008 (8:21 am)
You could follow the advice I got years ago from the then service manager at Bellevue (WA) Lexus and simply disconnect the MAF/IAT sensor while the engine is idling. The engine will die, reconnect the MAF/IAT, restart the engine and be on your way. For the next few drive cycles you will have a meaningless CEL but a very meanful TC/VSC "fault".
#8 of 11 wheels driving me nuts by gene22 May 16, 2008 (1:46 pm)
This sequence works fine. My wife thought I was having a fit or something watching me do it!   This did not solve my brake/stopping problem. I thought it did for a few trips, but now it is still there. Feels like drum our of round or bad pads. Can not figure it out. It does not happen all the time which is crazy. Any ideas? Replies to this message: kiawah (May 16, 2008 6:06 pm) gene22 (Jun 04, 2008 3:42 pm) wwest (Jun 04, 2008 8:39 pm)
#9 of 11 Re: wheels driving me nuts [gene22] by kiawah May 16, 2008 (6:06 pm)
Replying to: gene22 (May 16, 2008 1:46 pm) what are the symptoms of your 'weird braking problem' ?? Replies to this message: gene22 (Jun 04, 2008 3:42 pm) wwest (Jun 04, 2008 8:39 pm)
#10 of 11 Re: wheels driving me nuts [kiawah] by gene22 Jun 04, 2008 (3:42 pm)
Replying to: kiawah (May 16, 2008 6:06 pm) The problems do not seem to be there all the time.   When braking, and almost stopped it feels like the wheels are out of round. Like a flat spot. Also, notice it at higher speeds, but harder to describe.   Bought new tires, problem same before and after. Replies to this message: wwest (Jun 04, 2008 8:39 pm)
#11 of 11 Re: wheels driving me nuts [gene22] by wwest Jun 04, 2008 (8:39 pm)
Replying to: gene22 (Jun 04, 2008 3:42 pm) Ask you brake below ~10 MPH, down to fully stopped, late model Toyota and Lexus FWD and F/AWD vehicles will upshift and you will feel a bit of a forward "lurch", feeling as if the brakes released slightly.   Is that the feeling you're trying to describe...??   These transaxles will do the same thing, upshift, as you coastdown, throttle closed and/or braking, below 40-30 MPH.   10-0MPH is often described as being bumped slightly from behind, and 40-30MPH as a "slingshot effect".

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