WARNING: This page is about a different car, the 2004 Mitsubishi Eclipse. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Vehicle Speed Signal System Circuit < M/T> (1 Of 2)
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Fig 2: Vehicle Speed Signal System Circuit < M/T> (2 Of 2)