On some vehicles, the connector at the KR14 brake booster pump motor relay was not fully seated. Inspect the KR14 connector.
The brake booster pump relay is incorporated into the brake booster pump motor. If the connector is not fully seated, press the connector fully into the cavity. After seating the connector, deplete brake booster vacuum by depressing the brake pedal several times with the engine off. Then restart the engine and confirm that the brake booster pump runs and there is normal function of the brake pedal.