How does a bad ABS module affect AWD?
4th Gear
Joined: Mar 2006
Posts: 3,794
From: Home of the Yankees
The bottom line is the A4 quattro 96-01 has the torsen/quattro IV system. This system has EDL front and rear. ESP came later in 99.5-01. The quattro system is COMPLETELY mechanic. The abs just actuates the brakes on the slipping wheel to send torque to the opposing wheel that has traction, you'll barely even notice it. AWD is permanent.
Like I said before, been through two winters with a faulty abs module and the quattro system works just the same. Minus the EDL, which I can do myself. Say if I'm parked in a snow bank and a wheel is slipping. Just by lightly applying the brakes while still on the gas, the slipping wheel stops, torque goes to the others with traction, and boom I'm on my way.
Like I said before, been through two winters with a faulty abs module and the quattro system works just the same. Minus the EDL, which I can do myself. Say if I'm parked in a snow bank and a wheel is slipping. Just by lightly applying the brakes while still on the gas, the slipping wheel stops, torque goes to the others with traction, and boom I'm on my way.
Interesting, the ABS unit is available with options of -ABS- -ABS & EDL- -ABS, EDL & ESP- and -ABS, EDL, ESP, and ASR-.
I'm going to give a buddy at the Audi dealer a call tomorrow. Maybe we can shed light on the confusion.
According to AudiWorld, EDL is standard f & r in avant models. All others just say "EDL." I'm totally confused.
I'm going to give a buddy at the Audi dealer a call tomorrow. Maybe we can shed light on the confusion.
According to AudiWorld, EDL is standard f & r in avant models. All others just say "EDL." I'm totally confused.
3rd Gear
Joined: May 2008
Posts: 1,900
From: CT
So a few more interesting points:
The final word I received from an Audi master tech this week is that all B5 Quattros have EDL.
My confusion is that the ABS unit can be optioned without EDL. I assume this is for FrontTrack B5's without ESP, ASR, or EDL.
In the Owner's Manual, it discusses the EDL system briefly. It says that it will shut off after a specified time to prevent overheating the brakes. It further states that when the EDL is turned off due to this condition, it will drive just like a car equipped without EDL... but it does not specify anything about Quattro in relation to EDL.
So... why does the Owner's manual state that it can act like a car equipped without EDL when off? And why is the ABS unit available without EDL? The only conclusion I can come to is that these are references to FrontTrak.
In conclusion, the reason your Quattro with EDL can still get stuck is because the EDL shuts off to prevent brake overheating. So when the wheels spin and spin and cannot be stopped by modulated braking, they will continue to spin.
...which is why we should get a group-buy going for Quaife ATB diff kits...
The final word I received from an Audi master tech this week is that all B5 Quattros have EDL.
My confusion is that the ABS unit can be optioned without EDL. I assume this is for FrontTrack B5's without ESP, ASR, or EDL.
In the Owner's Manual, it discusses the EDL system briefly. It says that it will shut off after a specified time to prevent overheating the brakes. It further states that when the EDL is turned off due to this condition, it will drive just like a car equipped without EDL... but it does not specify anything about Quattro in relation to EDL.
So... why does the Owner's manual state that it can act like a car equipped without EDL when off? And why is the ABS unit available without EDL? The only conclusion I can come to is that these are references to FrontTrak.
In conclusion, the reason your Quattro with EDL can still get stuck is because the EDL shuts off to prevent brake overheating. So when the wheels spin and spin and cannot be stopped by modulated braking, they will continue to spin.
...which is why we should get a group-buy going for Quaife ATB diff kits...
Thread
Thread Starter
Forum
Replies
Last Post
