To clear the codes/reset the ecu, did you also do the brake pedal procedure indicated in the info Ldub posted? I don't know that just disconnecting the battery clears stored codes.
The ABS unit I'm talking about is located at the rear passenger side of the engine compartment (towards the rear of the vehicle from the fuse box). Is this the same unit that was replaced on your VX? The electrical connector is on the front side (towards the fuse box). I didn't disconnect mine, but I'm guessing that you slide that retaining clip towards the engine to release the connector from the ABS module.