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Yes the relays actuate the valves which are inside the unit.
The unit is largely a 2 piece system:
1. The ecu with relay solenoids, (abs plastic housing) bolted on to
2. The valves (aluminium block with brake lines and pump)
Plus of course there are all the sensors -
4 wheel speed
1 yaw
1 steering wheel angle
Maybe you can buy the whole unit and recode it? Hopefully plug and play.
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