PDAS and Brake light issue. C4 1990

[Orry]

Hi,


PDAS and Brake light issue. C4 1990

I study for quite some time this forum to get on the right track with my interlock and brake warning light.

My brake light together with the interlock warning light come up when I start the vehicle, as described by Adian Streather the light goes off after 20-30 sec and initial system check. After a while of driving sometimes 5 min or 10 min or 1 min the brake light together with the interlock warning light come up with the central warning light no buzzer and the light in the middle console .I can cancel the central warning light in the dash and middle console, but the brake and interlock warning light stay on.

According to Adrian’s AWD C4 overview it should be related to a low brake fluid level.
I checked the level, there is no leak and the contact in the cap works, the brake pads are OK, the brake pedal travel has also not changed, no tires have changed except that I had to replace one after a flat, but I changed with same brand and size.

Don't know if electronic is acting up or if there is a real problem. As a side note the Airbag light is on for a couple of month, from time to time it goes away but always comes back , once a month the seatbelt light comes on as well and goes away as it came on.

Clock is working like a charm. Any ideas what it could be ?

Thanks Orry

[dlpalumbo]

Have you tried bleeding the brake system. This requires the Porsche 'Hammer' ECU controller on the C4, so you will have to have it done for you.

Also make sure you have good grounds under the hood. I notice on my car that the paint has been scrapped away around the ground terminals (under the carpet).

Good luck,

Dan

[sml]

dont worry he is sorted. btw you can bleed without the hammer.

solved here ...

PDAS and Brake light issue. C4 1990 - Rennlist Discussion Forums

[xzjskww]

You can send it to repair shop to repair it.