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Old October 21st, 2013, 17:39   #1
phaser
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Default SOLVED - ESP Light on, dangerous brakes randomly pull left or right

Solved - see post 19

A friend just moved to Arkansas, and called with the following problem.

04 Jetta TDI, 155k miles

ESP light flashes, and the brakes will randomly, on their own, engage, and pull hard left or right with no braking input from the driver, and without warning.

Dangerous to say the least.

Any ideas? Bad sensor?
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Last edited by phaser; November 18th, 2013 at 22:35.
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Old October 21st, 2013, 17:55   #2
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Park the car and scan for codes.

Possible problems include (but are not limited to) YAW sensor and STEERING WHEEL position sensor.

Bill
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If you omit pertinent info from your question, you cannot reasonably expect a good answer.//Not affiliated with any vendors except as a customer.// Wise people lurk more.// I'm not a guru.// 'I got actual real friends in the real world'-T'sTDI/ If you were the only entry, there wasn't a race.// Grammar and spelling really are important, but I don't claim to be good at it.// Typical drivers can't.
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Old October 21st, 2013, 17:58   #3
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Originally Posted by 40X40 View Post
Park the car and scan for codes.

Possible problems include (but are not limited to) YAW sensor and STEERING WHEEL position sensor.

Bill
Could the ABS be related?
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Old October 21st, 2013, 18:11   #4
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Quote:
Originally Posted by phaser View Post
Could the ABS be related?

Absolutely!

The ABS is used by the ESP system to activate the brakes individually to help maintain control of the car.

The ABS light can be on because one or more of several parts of the system are acting up. A code scan will help narrow the list of suspects.

Bill
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If you omit pertinent info from your question, you cannot reasonably expect a good answer.//Not affiliated with any vendors except as a customer.// Wise people lurk more.// I'm not a guru.// 'I got actual real friends in the real world'-T'sTDI/ If you were the only entry, there wasn't a race.// Grammar and spelling really are important, but I don't claim to be good at it.// Typical drivers can't.
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Old October 21st, 2013, 19:03   #5
phaser
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Originally Posted by 40X40 View Post
Absolutely!

The ABS is used by the ESP system to activate the brakes individually to help maintain control of the car.

The ABS light can be on because one or more of several parts of the system are acting up. A code scan will help narrow the list of suspects.

Bill

Got some additional info. When he has the car up on jacks, and spins the FRONT wheels fast, the esp light comes on, stays on, and goes off when the car is set back on the ground.

Thoughts?

I put him in touch with autenje (vag-com locator) in Little Rock to see if he can arrange a scan.

When the either the left or right brake kicks in, it's a sharp hard pull.

My friend has parked the car. He's scared to drive it anywhere.
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Oil Filter - Hengst / Oil - Schaeffer Supreme 9000 5W-40 /
Bypass Filter EaBP100 /
Air Filter - EaA208
/ Transmission Oil - VW G50

Last edited by phaser; October 21st, 2013 at 19:42.
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Old October 21st, 2013, 19:16   #6
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DO NOT drive it anymore. You may cause a serious acciendent or injure yourself. One thing i always take seriously is braking components. sharp pull means the abs system is operating when it shouldnt.Get it towed. Might just be sensors or could be a new ABS pump. Scan first to find out the problem
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Old October 21st, 2013, 19:31   #7
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Never seen such a odd ball issue, but most likely you have bad wheel speed sensor or faulty abs module that acts up and applies brakes to random wheels. As others suggested, get ABS module scanned.
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Old October 21st, 2013, 19:40   #8
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Is there a speed sensor on all four wheels?
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Old October 21st, 2013, 19:44   #9
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That is a very strange fault,usually when you have faulty wheel sensor the abs system doesnt operate but you still get fully brakes ,they just lock up if you brake too hard. thinking more along the lines of what 40X40 said, YAW and poistion sensors playing havoc. could even be just one of the connectors to these are slighty loose causing intermited connection
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Old October 21st, 2013, 19:46   #10
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Quote:
Originally Posted by phaser View Post
Is there a speed sensor on all four wheels?
Yes all four
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Old October 21st, 2013, 19:50   #11
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http://en.wikipedia.org/wiki/Electro...bility_control

http://bostonvolkswagen.blogspot.com...ogram-esp.html

Not all of the above will apply to the car in question, but it is an interesting read nonetheless.

Bill
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If you omit pertinent info from your question, you cannot reasonably expect a good answer.//Not affiliated with any vendors except as a customer.// Wise people lurk more.// I'm not a guru.// 'I got actual real friends in the real world'-T'sTDI/ If you were the only entry, there wasn't a race.// Grammar and spelling really are important, but I don't claim to be good at it.// Typical drivers can't.
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Old October 22nd, 2013, 17:03   #12
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it already happened on a friend audi a3, it was YAW sensor (under steering wheel) who was sending wrong information and make car act like that, to drive normally but without ESP, you can remove connector from YAW sensor, the ESP light will come on but no more random breaking.
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Old October 22nd, 2013, 17:54   #13
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its still drivable if you pull the ABS/ESP fuse right, or is there more to it?
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Old October 23rd, 2013, 00:14   #14
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its still drivable if you pull the ABS/ESP fuse right, or is there more to it?
This would be great. Can anyone confirm this?

What about turning off the ESP at the dash switch?

If either idea could make the car safely drivable to get to a TDI shop, this would help my friend out immensely.

I'm also loaning him my VCDS cable to scan.

.
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2004 Jetta BEW 5M - 490k - 50 mpg / Fuel B-20 / Fuel Filter - Cat IR-0750 /
Oil Filter - Hengst / Oil - Schaeffer Supreme 9000 5W-40 /
Bypass Filter EaBP100 /
Air Filter - EaA208
/ Transmission Oil - VW G50

Last edited by phaser; October 23rd, 2013 at 00:40.
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Old October 27th, 2013, 12:17   #15
phaser
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its still drivable if you pull the ABS/ESP fuse right, or is there more to it?
This doesn't work. My friend pulled the fuse, and it just sets off all kinds of alarms.

Turning off the ESP at the switch didn't work either.

Still waiting for him to do a scan, and get any codes.
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Oil Filter - Hengst / Oil - Schaeffer Supreme 9000 5W-40 /
Bypass Filter EaBP100 /
Air Filter - EaA208
/ Transmission Oil - VW G50
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