ABS Pump
 

Hi all
Have just had the car back from the dealer who was checking out a TRAC / ASC warning light.

They initially thought it was the nearside wheel speed sensor & harness which they changed - for $384.88 + tax (:-0). Light stayed on. OBD reported C1095 - something to do with the pump motor circuit.

They say it may be a false negative since they did a hard reset & the light went out, but they explained something to me about pump motor resistance. It went something like this...(transcribed as well as I recall)..

A new ABS pump motor would provide 0.7ohm resistance, mine was 3ohms
A new ABS pump motor voltage with key off would be 4.67v, mine was 1.07v
A new ABS pump motor voltage with key on would be 7.96v, mine was 7.96v

I'm told everything is OK & that everything is safe, but to go see them again if the light comes back on.

Any thought's?

Jof

my ABS/stability control can be counted on to light up every three or four months. It usually clears with the clear button on the dash after one or two short trips. I am not concerned about the periodic fault on my car (1999 XK8).

When it stays on permanently, I'l fix it.

Wow! Never thought about pressing the clear button to get rid of an error message before! Always thought it was just for the tripometer ;-)
How the blatently obvious smacks you in the face every once in a while!
Jof