Yes you can. If you look at your photograph above the pin marked SDL, is the Serial Data Link. That should be wired to pin 9 of a J1962 (OBD2 type) connector with +12V on pin 16 and 0V on pins 4 and 5.
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1984 Suzuki SJ413K pick up, 1.6 16V Baleno engine 2000 Suzuki Vitara 1.6 8V, many mods 2004 Suzuki Ignis 1.5VVT 4Grip 2006 Suzuki Jimny 1.3VVT JLX+ and many more.
Welcome to the forum. The Denso ECUs usually have the pin designations marked on the circuit board. If you can post a picture of the board then I may be able to match it to a Swift ECU, is it a TBI or an MPI?
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1984 Suzuki SJ413K pick up, 1.6 16V Baleno engine 2000 Suzuki Vitara 1.6 8V, many mods 2004 Suzuki Ignis 1.5VVT 4Grip 2006 Suzuki Jimny 1.3VVT JLX+ and many more.