Randy V

Any tips on swapping out the ABS control unit, aka ABS computer?

I'm getting intermittent ABS warnings even after replacing wheel sensors and cleaning connectors and grounds.

I know it's located under the dash on the driver side, above the hood release lever.

The workshop manual, as is typical, gives no useful information on replacing it.

Thanks.

Tony

If it’s what I saw when my dash was out...it looks to be a PITA to get out.. that’s all I got.

Rob Edwards

Unmounts and goes back in with two 10 mm nuts. Before you do so, undo the bail on the connector, and plug the harness into the replacement brain and go drive the car to make sure it's cured, before going to the trouble of R&R'ing the old brain.

Randy V

Thanks, T - lol.

Excellent advice Rob. Will do exactly that. Much thanks sir.

Randy V

It appears the replacement control unit has stopped the warnings.

Now to figure out how to swap it!

Rob Edwards

Disconnect the battery.
Unplug the mirror memory module connectors, there are 'fins' on the connector top that facilitate pulling gently with pliers.
Undo the two nuts that hold the mirror module on the bracket and remove it.
Disconnect the 55 pin connector from the unit, if you haven't already.
There are two socket cap screws that hold the mounting bracket to the sidewall of the footwell. Can't remember what holds the top of the bracket in.

Assembly is the reverse of the above.

Randy V

Thanks Rob - will dive in tomorrow.

Tony

step 1...remove engine.

step 2...remove interior dash board...

step 3...mix stiff drink from trunk area.
.

Randy V

Ok that's not helping T. Maybe humorous but...

I'm looking for serious guidance on this one.

Bigfoot928

On the GTS you will make it much easier to get to if you remove the knee bolster as the 1st step. Need to remove the divers side carpet cover for the side of the console and the plastic cover down by the gas pedal. To remove the knee bolster there are 2 bolts at the center console, one allen bolt under the steering wheel in the center, and one 10 mm nut covered by the air hose that sends air to the drivers door vent.

Randy V

Thanks, sir. I was thinking removing the bolster would make the control unit swap easier. Have removed the bolster before when removing the instrument cluster. Not too difficult of a job.

GarryM

Good morning All,

Would any one have any detail pics of this ABS Control Unit mounted into a RHD car, I am trying to fit one into my 1991, there seems to be an angle bracket missing on one end of it?

This was not mounted in my vehicle when I got it.

Thank you for any assistance, for those that don't know this ABS unit is mounted just below the glovebox on RHD cars.

Randy V

Just wondering why necessary to first disconnect the battery Rob?

Bigfoot928

...

Wisconsin Joe

Some stuff is always powered.

Seats are one of those things, at least in certain years (my 85 is one - I can move my seats any time, key on or off).

I shouldn't have to tell you that grounding out a wire that has constant power is a bad idea.

It lets all the smoke out of the wires and components.
It's pretty expensive smoke.

I learned a LOOOOOONG time ago that there are ALWAYS wires near where I'm working that are always powered. Doesn't matter what I'm working on, or what car.
Yes, I learned this the hard way.

And yes, I need to re-learn it every once in a while.