Hi guys. I'm looking to buy a 350z and have a question. I've read you can turn off VDC by unplugging the yaw sensor and this will eliminate EBD but retain ABS. However, on an enthusiast model there is no yaw sensor to unplug. Has anyone successful found a solution to eliminating EBD from enthusiast models while retaining ABS?

Sorry if this has been answered, couldn't find anything from searching. Reason for asking is because if turning off EBD from enthusiast models is a problem then I will stay away from buying one.

Thanks.

 

Because EBD is an integral part of the braking system, it can't be turned off independent of the rest of the system. You could pull the brake fuse but you'd also lose ABS at that point.

Note that ABS/EBD are the same on all models, so it won't matter if we're talking about an Enthusiast, Touring or Track model.

I'm curious, what do you hope to gain by turning it off? I suspect you're working on a mistaken impression of what EBD does or doesn't do.

 

This is the kind of post that confounds me. If you are an experienced racer, you know the purpose and function of Electronic Brake Force Distribution.

If you are an inexperienced racer, and do not own a car suitable for racing, EBD is a trivial consideration.

 

Ok thanks guys. My general idea of what EBD does is that it will take off braking force from a slipping pair of wheels (front or rear) and send the power to the wheels with more grip (considering they aren't at threshold yet). I understand how it can help in straight line braking but from what I read I thought it was interfering with trailbraking situations somehow.

I've been using a 97 Honda on the track the past few years and generally only have mechanical knowledge/experience with older model cars that don't have any electronics except for crappy abs systems. All this new computer aided control is new to me so I don't really understand them =)

 

Here's a description of what each of the systems does and how it does it. EBD is very subtle when compared to what TCS and VDC do.

VDC Function
In addition to the TCS/ABS function, the driver steering amount and brake operation amount are detected from the steering angle sensor and pressure sensor, and the vehicle's driving status (amount of understeering / over-steering) is determined from information from the yaw rate sensor/side G sensor, wheel sensor, etc., and this information is used to improve vehicle stability by controlling the braking and engine power to all four wheels.
The SLIP indicator lamp flashes to inform the driver of VDC operation.
During VDC operation, the body and brake pedal lightly vibrate and mechanical noises may be heard. This is normal.
The ABS warning lamp, VDC OFF indicator lamp, and SLIP indicator lamp might turn on when the vehicle is subject to strong shaking or large vibration, such as when the vehicle is on a turn table or a ship while the engine is running. In this case, restart the engine on a normal road, and if the ABS warning lamp, VDC OFF indicator lamp, and SLIP indicator lamp turn off, there is no problem.

TCS Function
The wheel spin of the drive wheels is detected by the VDC/TCS/ABS control unit from the wheel speed signals from the four wheels, so if wheel spin occurs, the rear wheel right and left brake fluid pressure control and engine fuel cut are conducted while the throttle value is restricted to reduce the engine torque and decrease the amount of wheel spin. In addition, the degree the throttle is opened is controlled to achieve the optimum engine torque.
Depending on road circumstances, the driver may have a sluggish feel. This is normal, because the optimum traction has the highest priority under TCS operation.
TCS may be activated any time the vehicle suddenly accelerates, suddenly downshifts, or is driven on a road with a varying surface friction coefficient.
During TCS operation, it informs a driver of system operation by flashing SLIP indicator lamp.

ABS Function
The Anti-Lock Brake System is a function that detects wheel revolution while braking, and it improves handling stability during sudden braking by electrically preventing 4 wheel lock. Maneuverability is also improved for avoiding obstacles.

EBD Function
Electronic Brake Distributor is a function that detects subtle slippages between the front and rear wheels during braking, and it improves handling stability by electronically controlling the Brake Fluid Pressure which results in reduced rear wheel slippage.

 

Thanks for the info. Out of curiosity will ebd distribute brake force to the front wheels if only one rear wheel locks up (I know abs will kick in on that wheel)?

 

I have experienced the same thing. Something -- I assume EBD -- interferes with I try to trail brake at certain speeds (usually lower speed, like under 60mph). It starts pulsing one of the wheels, the outside-front if I recall (I haven't driven the Z on the track in a few months now). It's pretty annoying.

 

From my track expereince with the Z I have no problems trail braking. The point is to shift weight forward going through a turn and if the car is slowing down weight will be shifted forward. EAD's taking away of braking force, from a wheel that wouldn't provide that much braking anyways, has not caused any problems.

 

If you are purchasing an enthusiast model Z, you do not have VDC..just TCS. For track days, you will simpy push the TCS button to disable it, and you are done. There is no yaw sensor, or any other interference when running an enthusiast as a track car.