Suzuki Grand Vitara XL-7 Service Manual page 452

AUTOMATIC TRANSMISSION (4 A / T) 7B1-47
REFERENCE
Connect oscilloscope between E202-4 (+) and E202-16 (–) of TCM
connector connected to TCM and check output shaft speed sensor
signal.
[A]: Oscilloscope waveforms at about
40 km / h (25 mile / h)