Few days ago lost speedo and all ABS and DSC lights came on. Quick search indicates the sensor, but the fault is intermittent.
Scan with INPA reveals severl electrical errors all ocurred at same time.
5DB1 Left Rear Wheel Speed Sensor : Extrapolation
5DB3 Left Rear Wheel Speed Sensor : Accident Recognition
112 seat occupancy
wiring break seat mat
Relay Rear window defogger
short to ground
invalid working earea
131 speed A
short circuit to ground
Also error indicating the seat tensioners are giving too high a resitance reading.
Spent weekend testing all circuits and looking at wiring, cleaned all connections to no avail.
Wheel sensor seesm to measure OK.
This morning no errors for 1st hour of driving then the lights came back on.
Despite the seat occupancy and tensioner errors no Airbag light.
Any ideas how I can tell whether the sensor is at fault or it is the reluctor ring corroded , or whetehr these errors could all be caused by a ground problem elsewhere.