a locking latch of the motor vehicle door leaf comprising a pawl and a bolt configured to cooperate such that locking or unlocking of the door leaf is allowed;

an electric actuator;

a transmission arrangement configured to transmit a movement of the electric actuator to the bolt in order to displace the bolt of the locking latch between an unlocking position wherein the bolt is released from the pawl and a locking position wherein the bolt is locked by the pawl, the transmission arrangement comprising:

a downstream transmission member configured to transmit a movement to the bolt,

an upstream transmission member configured to transmit a movement from the electric actuator to the downstream transmission member; and

a blocking member movable relative to the downstream transmission member and/or the upstream transmission member, the blocking member being configured to define with the upstream transmission member:

a relative blocking position wherein the blocking member cooperates with the upstream transmission member such that a transmission of a movement between the upstream transmission member and the downstream transmission member is allowed, and

a relative unblocking position wherein the blocking member is movable according to at least one degree of freedom with respect to the upstream transmission member,

wherein the blocking member comprises a cam surface configured to allow a displacement of the blocking member under a thrust from the upstream transmission member such that the upstream transmission member and the blocking member are positioned in the relative blocking position,

wherein the blocking member is movable between an open position wherein the upstream transmission member is allowed to move from the relative blocking position to the relative unblocking position and a closing position in which the blocking member is opposed to the displacement from the relative blocking position to the relative unblocking position,

wherein the blocking member comprises a contact surface configured to come into contact with the upstream transmission member, the blocking member being guided between the closing position and the open position along a path comprised in a plane of the contact surface,

wherein the blocking member is movable in rotation about an axis of rotation, the contact surface being oriented perpendicular to a segment connecting the axis of rotation to the contact surface.