John Speake

Hi Fred;
Picture here....
http://www.jdsporsche.com/Lateral%20...%20sensor.html

Bertrand Daoust

You can remove it with the seat in place.
Removed it last summer to clean the connections.

Dave928S

I removed the lateral acceleration sensor on mine (under the LHS passenger seat), with the intention of opening it up and cleaning it, as per what others have done, as shown in a few threads here.

To my surprise, mine is not serviceable, so I assume the very latest ones are sealed, but from what date?? Mine is 0358 built in May 95, with 101 built after that.

FredR

Well I think i found out what the problem is [was?]. First of all I took a look at the lateral acceleration sensor- the top cover popped off with a little help from a fine screwdriver and everything in there looked as clean as a whistle- gave the inners a blow with my airgun and popped the cover back on.

Then took a look at the rear wheel well and decided i might as well do the resistance checks for the speed sensors but was not sure if the connectors in the wheel well were the right ones so deferred that activity.

Decided I would revisit my previous efforts to check the fluid level in the reservoir- it was perfect- possibly a tad overfilled but nothing to get too excited about. The connector to the solenoid vlve looked fine then took a look at the connector to the PSD pump - alarms started flashing- something not right here! Grabbed hold of the connector and it fell away from the socket - durrgh! Seems I put the spring clip back on and seated the connector more or less where it should be but for whatever reason did not push it home locked into position. Presumably it initally had sufficient contact to make it work but after a bit of bumping around the contact failed and no PSD system.

Cannot believe I managed to do something so dumb *** especially after writing out a 23 point check list for the flush procedure with this being the last item on the list.

Just taken it for a test drive- no alarm!

Again, thanks for the inputs- I have learnt quite a bit but doubtless there is still way more to learn.

Bertrand Daoust

Great!

Let us know if it works.

buccicone

I believe I solved my intermittent ABS/PSD warning on my '90 GT yesterday. ABS relay corrosion. Test drove. Did burnout.

FredR

Bernard,

It sure does- its me that doesn't work properly!

Rgds

Fred

FredR

Looks as though you have been watching "My Cousin Vinnie" but I'll bet you did not have Marisa Tomei as a star witness!

Well done- just shows how fickle these things really are.

Although I have plenty of problems with plastics and rubbers as a general statement my electrical contacts invariably seem remarkably bright when I inspect them and thus do not tend to suspect things like relay contacts.

I live on the coast and it can get very hot and humid in July but touch wood the only real electrical issue I had was at the 14 pin connector where half the cables had gone and the other half so so.

NoVector

Hi Fred - Glad you got it sorted. So between you and Bertrand, I'm kind of curious. I know if you take the relay out (the one in the spare tire area) the dash will light up with the error and will reoccur like Bertrand said about every 15 minutes. But with the pump unplugged you only received the error on startup and not afterwards? Knowing that might help others diagnosing problems in the future. Again, congrats!

Bertrand Daoust

I find it strange also that it didn't come back each 15 minutes.

I'd say that a bad or not well seated connection would trigger an alarm but would resume as soon as the connection gets back.
Like what was happening at first.

Just like the airbag malfunction alarm I get on my car.
The system trigger the alarm when I hit a bump but resume by itself after a few seconds.
I know that it is a bad connection somewhere.
Just haven't found where yet... Annoying to say the least.

FredR

It seems as though I only got the one annunciator alarm at start up. Pretty sure I was running for more than 15 minutes on two occasions but did not notice a recurrence of the initial alarm. Still surprised that there was nothing illuminated on the dash to tell me the system was non functional just as I am surprised that the PSD lamp is not a guardantee that the diff lock correction is in fact being applied.

We continue to learn!

steaditim

Found it !

Can someone tell me where the fuse is in the spare tire area for the PSD unit ?

Thanks,

T

Dave928S

Standing at the rear of the car, with the hatch open, it is behind a plastic cover panel on the right side of the spare tyre recess area, furthest away from you. The cover is held in place by some metal tabs, and slides up and out easily, to reveal the relay, and the fuse.