9-3 (9440) L4-2.0L Turbo (2007)
6. Check whether any of the pins/bolts move up/down. Repeat the procedure a couple of times.
7. If any of the pins/bolts move visibly, then there is a leak in the valves. Change hydraulic unit.
Note: The control module shall be re-used on the new unit.
8. If none of the pins/bolts move then the fault is in another of the brake system's components. Remove the pins/bolts and refit the rubber plugs
before continuing fault diagnosis.