Brake DTC 00668

[Dana Hanchett]

My daughter's 2001 Jetta Gas. I know I should have gotten her a TDI w/ 30K miles in one yr.. Her Jetta set the ABS light and has a brake DTC 00668 and I don't know where to begin. Also listed was 008 implausible signal intermittent. Would appreciate any help. Thanks.

 

[Davin]

Looks like a power-supply problem.

00668
Vehicle voltage terminal 30, signal outside tolerance.
- Check fuses wires, conncetions as well as voltage supply to COntrol Module
- Check wiring in wiring harness

The relevant fuses are S178 and S179.

Bentley recommends checking the following wiring:

Harness pin 9 should go to battery positive (with ignition OFF, it says). Pin 24 should go to ground. Since it's intermittant, you might want to try wiggling things while you test. Or you could just clear the code and see if it comes back...

Here's an image of the connector:

This is for the Mk20 ABS modules... if you have a Mk60, disregard this post.

 

[Dana Hanchett]

Thank you very much DavinATL. Looks like I've got my work cut out for me.