Without Using SUZUKI Scan Tool

WARNING: This page is about a different car, the 2006 Suzuki XL-7. However, it is still accessible from the selected car via links, so may be relevant.

Turn ignition switch to ON position.
Using service wire (1), connect diagnosis switch terminal ("PNK" wire) (2) to ground terminal ("BLK" wire) (3) in diagnosis connector (4) more than 5 times at about 1 second interval within 10 seconds.
Wait more than 9 seconds.
Perform DTC Check and confirm that DTC No. 12 is displayed.

Fig 1: Identifying Service Wire, Diagnosis Switch Terminal, Ground Terminal & Diagnosis Connector
Courtesy of SUZUKI OF AMERICA CORP.