V6 ABS/ESP problems

[FarmerPug]

My 406 V6 (2001 Multiplex Estate)when started throws up lights/messages for the ABS/ESP system, airbag fault and the power steering is heavy.

I recently replaced the alternator and battery, and what i assume to be the ABS/ESP ecu was unplugged at the time, its all plugged back in now and been inspected a dozen times.

PP2000 is saying the following:

Airbag ecu - remote permanent fault. Vehicle speed information.

Power steering - permanent fault: sensor signal: vehicle speed/(short circuit to positive or circuit open).

Bsi - no communication with abs or esp ecu, vehicle longitudinal acceleration information incorrect value received and vehicle speed information incorrect value received.

ABS or ESP ecu - the ecu has not replied

Engine ECU - remote permanent fault, no communication with the abs or dynamic stability control ecu

Automatic transmission - no communication with abs or esp

Anyone ever had an issue like this?

[V6GTX]

Did this ever get resolved ? It's not a problem I've seen but I'm a firm believer in acting on error messages which in this case all point to a problem with the vehicle speed sensor. Did the wiring for this get dislodged in some way ?

[FarmerPug]

I found the esp ecu in behind the glove box, removed it and sprayed wd40 round the contacts. Put it back in and the issues went away

[frog]

Note that using the normal WD40 (with the red cap) as electric contact cleaner is not a good idea. The fatty parts will insulate the contacts and attract dust and dirt.

Better to use a real electric contact cleaner (if you persist on using WD40 there are the "contact spray" flasks with the yellow caps, but there are cheaper alternatives).