SLIP, VCD AND "E-BRAKE light ! Help !
09-10-2012, 05:56 AM
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SLIP, VCD AND "E-BRAKE light ! Help !
Hello.
Iīm having o problem with my 350z.
Fist of all itīs an euro model ! It got brembo brakes and cruse controll itīs called a GT version! Donīt know what it is called in the US.
Anyway.
I have 235/40-18 in front and 245/45-18 in the back !
And during driving on the high way (In rain ) the SLIP, VCD and E-BRAKE LIGHT came on.
Sometimes the light go of when the carīs been standing over night, or when iīm driving and turn of ignition and then star again the light sometimes are OFF !
Any one got an ideé on how to get rid of the problem ?
I have checked brakefluid and brake pads ! They are ok !
Sry for my poor english Iīm from sweden SO DONīT HATE ! HAHA
Iīm having o problem with my 350z.
Fist of all itīs an euro model ! It got brembo brakes and cruse controll itīs called a GT version! Donīt know what it is called in the US.
Anyway.
I have 235/40-18 in front and 245/45-18 in the back !
And during driving on the high way (In rain ) the SLIP, VCD and E-BRAKE LIGHT came on.
Sometimes the light go of when the carīs been standing over night, or when iīm driving and turn of ignition and then star again the light sometimes are OFF !
Any one got an ideé on how to get rid of the problem ?
I have checked brakefluid and brake pads ! They are ok !
Sry for my poor english Iīm from sweden SO DONīT HATE ! HAHA
Last edited by Wodiz; 10-19-2012 at 04:23 AM.
09-10-2012, 06:11 AM
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You need tires that provide the same overall diameter ratio as OEM.
The overall diameter of your tires is completely different than stock, and the ratio from front to rear is no longer the same. The car monitors the speed that each wheel is rotating and uses the ratio when trying to decide if you've lost traction. Since your ratio is off, the car thinks that you are losing traction.
The overall diameter of your tires is completely different than stock, and the ratio from front to rear is no longer the same. The car monitors the speed that each wheel is rotating and uses the ratio when trying to decide if you've lost traction. Since your ratio is off, the car thinks that you are losing traction.
09-10-2012, 06:16 AM
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This will help explain: https://my350z.com/forum/2003-2009-n...45#post4936171
Q: The "Slip" light come on randomly, especially in turns, even though my tires aren't slipping. What's up with that?
A: Both the Traction Control System (TCS) and Vehicle Dynamic Control (VDC) can cause the "slip" light to come on. There are a couple of things that can make it come on even though you don't feel/hear your tires slipping.
The most common cause for this behavior is replacement of the OEM tires with a different size. All Zs come with staggered tires, that is to say the fronts are a little shorter than the rears. This causes the tires to rotate at different rates which TCS and VDC depends on for normal operation. If you install tire combinations that don't maintain that stagger, it can cause problems for TCS/VDC resulting in the "slip" light illuminating.
The stock tire sizes and Outside Diameters are:
225/50/17 25.9"
235/50/17 26.3" (0.4" stagger)
225/45/18 25.9"
245/45/18 26.7" (0.8" stagger)
245/40/18 25.7"
265/35/19 26.3" (0.6" stagger)
265/40/18 26.3"
285/35/19 26.9" (0.6" stagger)
When choosing new tires, try to find front/rear pairs that maintain the stagger of at least ―" and less than 1". You should also look for front/rear setups that maintain the same OD as that will keep your speedometer and odometer accurate.
Here are the most common "upsized" tire combinations. These are known to work and keep TCS/VDC happy.
245/40/18 25.7"
275/40/18 26.6" (0.9" stagger)
245/35/19 25.8"
275/35/19 26.6" (0.8" stagger)
255/35/19 26"
285/35/19 26.9" (0.9" stagger)
245/30/20 25.8"
275/30/20 26.5" (0.7" stagger)
Check the manufacturer's website to find the Outside Diameter of tires before you buy them, or use one of the online tire calculators:
http://www.miata.net/garage/tirecalc.html
http://www.wheelsmaster.com/rt_specs.jsp
A less common cause for the "slip" light to illuminate comes from replacing the fronts or rears only. If you replace only the fronts or rears, the stagger may not be what you think it is because the other worn pair is actually up to ―" smaller than they were when new.
New tires also come with a release agent on the surface of the rubber that must be worn off. That makes them slick and can result in your tires actually slipping, hence the "slip" light.
NOTE: The slip light does and will come on during "normal" driving that is unrelated to tire size or wear. If you apply too much throttle when launching or going around a turn, the wheels will slip and cause the light to illuminate. Also, driving on slick road surfaces (water, oil, rocks) can also cause your tires to slip.
A: Both the Traction Control System (TCS) and Vehicle Dynamic Control (VDC) can cause the "slip" light to come on. There are a couple of things that can make it come on even though you don't feel/hear your tires slipping.
The most common cause for this behavior is replacement of the OEM tires with a different size. All Zs come with staggered tires, that is to say the fronts are a little shorter than the rears. This causes the tires to rotate at different rates which TCS and VDC depends on for normal operation. If you install tire combinations that don't maintain that stagger, it can cause problems for TCS/VDC resulting in the "slip" light illuminating.
The stock tire sizes and Outside Diameters are:
225/50/17 25.9"
235/50/17 26.3" (0.4" stagger)
225/45/18 25.9"
245/45/18 26.7" (0.8" stagger)
245/40/18 25.7"
265/35/19 26.3" (0.6" stagger)
265/40/18 26.3"
285/35/19 26.9" (0.6" stagger)
When choosing new tires, try to find front/rear pairs that maintain the stagger of at least ―" and less than 1". You should also look for front/rear setups that maintain the same OD as that will keep your speedometer and odometer accurate.
Here are the most common "upsized" tire combinations. These are known to work and keep TCS/VDC happy.
245/40/18 25.7"
275/40/18 26.6" (0.9" stagger)
245/35/19 25.8"
275/35/19 26.6" (0.8" stagger)
255/35/19 26"
285/35/19 26.9" (0.9" stagger)
245/30/20 25.8"
275/30/20 26.5" (0.7" stagger)
Check the manufacturer's website to find the Outside Diameter of tires before you buy them, or use one of the online tire calculators:
http://www.miata.net/garage/tirecalc.html
http://www.wheelsmaster.com/rt_specs.jsp
A less common cause for the "slip" light to illuminate comes from replacing the fronts or rears only. If you replace only the fronts or rears, the stagger may not be what you think it is because the other worn pair is actually up to ―" smaller than they were when new.
New tires also come with a release agent on the surface of the rubber that must be worn off. That makes them slick and can result in your tires actually slipping, hence the "slip" light.
NOTE: The slip light does and will come on during "normal" driving that is unrelated to tire size or wear. If you apply too much throttle when launching or going around a turn, the wheels will slip and cause the light to illuminate. Also, driving on slick road surfaces (water, oil, rocks) can also cause your tires to slip.
09-10-2012, 07:12 AM
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You need tires that provide the same overall diameter ratio as OEM.
The overall diameter of your tires is completely different than stock, and the ratio from front to rear is no longer the same. The car monitors the speed that each wheel is rotating and uses the ratio when trying to decide if you've lost traction. Since your ratio is off, the car thinks that you are losing traction.
The overall diameter of your tires is completely different than stock, and the ratio from front to rear is no longer the same. The car monitors the speed that each wheel is rotating and uses the ratio when trying to decide if you've lost traction. Since your ratio is off, the car thinks that you are losing traction.
09-10-2012, 07:58 AM
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245/40/18 25.7"
265/35/19 26.3" (0.6" stagger)
But he is running:
245/40/18 (25.7")
265/35/18 (25.3") BAD -0.4" stagger
At first, I didn't have time to plug that into a tire calculator to determine the difference - but you can see that his rears are actually shorter than his fronts. The rears should be taller, not shorter.
Last edited by SparkleCityHop; 09-10-2012 at 08:03 AM.
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09-10-2012, 09:19 AM
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This is the closest OEM configuration to what he is running:
245/40/18 25.7"
265/35/19 26.3" (0.6" stagger)
But he is running:
245/40/18 (25.7")
265/35/18 (25.3") BAD -0.4" stagger
At first, I didn't have time to plug that into a tire calculator to determine the difference - but you can see that his rears are actually shorter than his fronts. The rears should be taller, not shorter.
245/40/18 25.7"
265/35/19 26.3" (0.6" stagger)
But he is running:
245/40/18 (25.7")
265/35/18 (25.3") BAD -0.4" stagger
At first, I didn't have time to plug that into a tire calculator to determine the difference - but you can see that his rears are actually shorter than his fronts. The rears should be taller, not shorter.
"NOTE : iīve changed the rear tyres with the front so now I have 245/40-18 in front and 245/45-18 in the back !"
also, i just realized, i dont even know what year he has and if the sizes are different OEM than what im thinking.
Last edited by ericjackson; 09-10-2012 at 09:20 AM.
09-10-2012, 10:11 AM
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Ah, I see that now. 
You'll have to forgive me, I'm on medicine and facing surgery on both my eyes in the next week or so. Less than clear mind + less than clear vision = my fail.
245/40/18 25.7"
245/45/18 26.7"
That's going to be a 1" stagger.
You'll have to forgive me, I'm on medicine and facing surgery on both my eyes in the next week or so. Less than clear mind + less than clear vision = my fail.245/40/18 25.7"
245/45/18 26.7"
That's going to be a 1" stagger.
09-10-2012, 12:34 PM
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Okey so i read som of the replys and I will chek the brakefluid and pads tomorrow.
And about the tire problem, with size do i need and what tire do i need to change ?
And about the tire problem, with size do i need and what tire do i need to change ?
09-13-2012, 12:35 PM
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okey, so i checked the brake fluid and it was low but not that low. So i filled it full but no change.
Sometimes under braking the "e-brake" light turns off, so i think thats just bad brakepads.
NOW i just need more tips on witch tire sizes i need ?
Or any other idees on what is wrong !
PLZ help !
Sometimes under braking the "e-brake" light turns off, so i think thats just bad brakepads.
NOW i just need more tips on witch tire sizes i need ?
Or any other idees on what is wrong !
PLZ help !
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