OBD doesn't appear to be working

[kiloran]

Confirmed that ABS is working too, which is impressive considering it hasn't been working for at least 6 months. Definitely a blast from the past in how it operates compared to modern cars - much slower and longer pulses as a switches from wheel to wheel

[Laird Scooby]

Originally Posted by Wagon Sailor

Just for future reference, some Honda wheel/speed sensors integral to the abs system can sometimes stop working if they get very dirty. I don't know about 940s. Worth checking from time to time?

Early Honda Legends and all Rover 800s use the same sensor in the rear wheels as the 7/9xx range uses on the front. Same problem exists for alost every ABS-equipped car and the Mk3 Cavalier uses the same sensors as already mentioned on the front.

The problem is that brake dust has microscopic particles of steel in from the discs, the sensors have magnets in, you can work out the rest!