April 5, 2026: LEMON Manuals is launched! Read the announcement.

Vehicle Speed Signal

PCM terminal: 3T(+) <-> 4A(-)
Oscilloscope setting: 1.0 V/DIV (Y), 10 ms/DIV (X), DC range
Vehicle condition: Driving 50 km/h [31 mph]

Fig 1: Identifying Vehicle Speed Signal
Courtesy of MAZDA MOTORS CORP.