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2003-2009 Nissan 350Z

slip light & VDC Off Lights

Old 02-12-2019, 02:47 PM
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zatalluvia
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Default slip light & VDC Off Lights

hello, i own a 2003 nissan 350z and im having a problem with the VDC System. when i start the car and start moving it the front left wheel begins to brake on its own and the slip light flashes when this happens. after it does it a few times the VDC OFF Light comes on and the problem goes away. if anyone has any experience with this issue some help would go a long way! thanks to anyone that helps!
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Old 02-12-2019, 03:03 PM
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dkmura
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There's most likely a problem with your wheel speed sensor. Do you have access to a code reader to get the diagnostic system to confirm it?
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Old 02-12-2019, 04:54 PM
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Is your ABS light on? A wheel speed sensor problem would probably give you an ABS light as well.
If you have a code reader, make sure it can read ABS faults. Some simple code readers only read engine faults.
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Old 02-13-2019, 03:28 AM
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Make sure you are fixing the issue before too long. This issue destroy my ABS unit and I had to replace it after less than a week.
Your problem is the ABS speed sensors located in the front wheel hubs.
1. Make sure the cables are routed away from wheel/brakes. Inspect and make sure there is no abrasion or cut.
2. Next is to check the metal tab that holds the sensor in place. They can bend easily ( if you pull on the cable) and will not provide a good reading if not flush.

if it doesn't work, you'll need a code reader that can read CANbus for wheel speed info or ABS. not many do that unfortunately. Or bring it to Nissan for diagnostic. Then you'll know exactly which speed sensor is bad.
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Old 02-13-2019, 05:40 AM
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I have personal experience with this exact same issue...

I believe this is related to the steering angle sensor located behind the steering wheel. Its mounted directly behind the clock spring, on the steering wheel. I just upgraded my 03 to an 06 steering wheel to have the audio control buttons from the 06, and had to alter the wiring and install a new clock spring t support the additional wires. When I transferred my existing steering angle sensor, I had to recalibrate it to prevent the TCS from going crazy on turns (slip and VDC off lights come on)--if I drove straight it was ok, but the minute I tried to turn, the car went haywire. So, my guess is the steering angle sensor went bad or needs recalibrated, but if you didn't mess with it, it shoudl not need calibrated. The job is kind of a pain, maybe an hour to 2 hours, to replace. The angle sesnor at the dealership will be expensive, like $700, not including labor. I have a spare one I can sell you (not for $700 either) but you will need to recalibrate it with an advanced scan tool that supports Nissan ABS work functions.I have heard people say that the dealerships may charge anywhere for $50 to 175 to cal the SAS.

For now, if its your daily driver, be sure to turn the TCS (VDC off) when you start the car and you will be fine until you get this fixed, otherwise an improperly cal'd or non functional SAS (steerign angle sensor) will beat on your ABS system and make the car very hard to drive, and could cause an accident if you aren't careful.
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Old 02-21-2019, 08:35 PM
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Sorry for the later response everyone Iíve been trying to get my hands on a scammer that can read the abs codes. I believe it is something to do with the recalibration if that unit.
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Old 02-21-2019, 08:35 PM
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zatalluvia
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Originally Posted by onecoolee View Post
I have personal experience with this exact same issue...

I believe this is related to the steering angle sensor located behind the steering wheel. Its mounted directly behind the clock spring, on the steering wheel. I just upgraded my 03 to an 06 steering wheel to have the audio control buttons from the 06, and had to alter the wiring and install a new clock spring t support the additional wires. When I transferred my existing steering angle sensor, I had to recalibrate it to prevent the TCS from going crazy on turns (slip and VDC off lights come on)--if I drove straight it was ok, but the minute I tried to turn, the car went haywire. So, my guess is the steering angle sensor went bad or needs recalibrated, but if you didn't mess with it, it shoudl not need calibrated. The job is kind of a pain, maybe an hour to 2 hours, to replace. The angle sesnor at the dealership will be expensive, like $700, not including labor. I have a spare one I can sell you (not for $700 either) but you will need to recalibrate it with an advanced scan tool that supports Nissan ABS work functions.I have heard people say that the dealerships may charge anywhere for $50 to 175 to cal the SAS.

For now, if its your daily driver, be sure to turn the TCS (VDC off) when you start the car and you will be fine until you get this fixed, otherwise an improperly cal'd or non functional SAS (steerign angle sensor) will beat on your ABS system and make the car very hard to drive, and could cause an accident if you aren't careful.
how much are you willing to let it go for?
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Old Yesterday, 04:54 AM
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Originally Posted by zatalluvia View Post

how much are you willing to let it go for?
PM incoming.

I can look up the model of my scanner, if you are looking to do a ABS-SAS reset. You have to pay $200 (up to about $4k) or more for the scanners that have work support for ABS. Sadly, there are only a handful that actually work properly, even though the scanner manufacturers say they support SAS reset...which I found to be totally false. I have confirmed the tool that I have does work though, and I can actually watch the degrees change when I turn the wheel in either direction... TDC or straight ahead should read 0 degrees though, so after calibration with the wheels pointed striaght, it will be 0. My scanner is also supposed to support TPMS functions, but I have not tried those or needed anything outside of the ABS work support so far. I can post the manufacturer and model here, if needed for the community--I am 99.9% sure its a Foxwell NT650.
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