Vehicle Speed Sensor Signal (From Combination Meter)

Raise and support vehicle so drive wheels are off ground. Drive vehicle at steady 25 MPH. Using osciliscope, check output signal between ground and combination meter harness connector M41 terminals 17 (8-pulse) and 18 (2-pulse). If osciliscope patterns are not as indicated in illustration, replace combination meter. See Fig 1 .

Fig 1: Identifying Vehicle Speed Sensor Oscilloscope Patterns

Courtesy of NISSAN MOTOR CO., U.S.A.