Suzuki Wagon R Manual page 765

7B-54 AUTOMATIC TRANSMISSION (4 A / T)
3) Install shift switch (1) to transmission case.
Tightening Torque
(a): 18 N·m (1.8 kg-m, 13.0 lb-ft)
4) Move selector lever in cabin to each range and check the conti-
nuity of each terminal of shift switch referring to INSPECTION.
5) Connect shift switch coupler.
6) Check that the engine can only be started in "N" and "P" range,
but can not in "D", "2", "L" or "R" range. Also, check that backup
lights come ON at "R" range.