Vehicle Speed Sensor Signal (From Combination Meter)
WARNING: This page is about a different car, the 2002 Infiniti Q45. However, it is still accessible from the selected car via links, so may be relevant.
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 .