greg928GTS

Took the 93 out today for a run, first time in 3 weeks. I had a warning message saying anti-lock system not working differential lock not working. Also, my speedometer and odometer were not working. I drove for about 20 miles, shut the car down, and 1/2 hour later everything worked again.

Any ideas what might have caused this?

Oldtee

Look between your shoes and say "ground, ground, ground"

bigs

You know, I got a warning message once when I didn't have my Speedo too!

Ketchmi

Hey Bigs, we have some more leather like your new front seats to make you a custom speedo...

I think I'm gonna' be sick.

Ketchmi

On a lighter note now that I've quit retching...

The ABS system controls the speedometer on later cars as well as the PSD system. I would follow Oldtee's advise and check the grounds on the ABS sensors.

bigs

Can you do a leopard print on it??!!

IcemanG17

Greg
Is the magical gremlins at work....all 928's have them to a certain degree! When in doubt try the "windows fix" of turning it off and starting it again.... To really fix the problem, check the grounds!

Vilhuer

Check left front wheel sensor first. IIRR ABS and speedo signal comes from it on late cars.

pewter82

Greg, loose ground, was "fixed" a few months ago, you can call Mike Pope and he can enlighten you on what it was...not a biggy if i remember right.

Jason

greg928GTS

LOL, I should have known, for years French Canadians have been coming down to Old Orchard Beach and wearing speedos, kind of a local joke.

Thanks Jason, I'll call him and ask.

I can't wait to get my shop up and running so I have a nice place to work on the car . . . or have someone work on it for me.

Gremlins or not, I was quite happy to start the car right up after three weeks of sitting in a cold storage room. That has NEVER been the case with my 89.

I think my car was upset with me for leaving sit for three weeks. I've learned my lesson.

Jim M.

Just did a BTDT with my 93 GTS. Turned out to be the ABS relay. Tried cleaning the contacts in the relay but that only worked for about three weeks. New relay fixed it!

Jim Mayzurk
93 GTS 5-spd

Scott M.

I second Jim M's ABS relay comment. A few bangs and it's good for a spell.


93 GTS 5M stroked

tv

Does the ABS system control the speedometer on an 85 euro WITH ABS???

If not what does, what is the thing in the spare tire compartment??

Alan

TV,

91 & later only

Alan

tv

Thanks Alan, after searching and reading here is the deal for others;


"On the earlier cars, the speedometer/odo get nine 12 vdc square-wave pulses per wheel revolution. The "sender" is just a reed switch, operated by nine magnets in a ring...

As Wally mentioned, the early cars derive a speedo signal from magnet wheel located in the differential. The sender unit located on the outside of the diff housing is a reed switch.

PSD equipped cars are a different kettle-o-fish.There is no 'magnet wheel' in the diff on these models. The speedo gets its signal from the PSD computer which derives its info from the ABS sensors." (sensor in front wheel)