WARNING: This page is about a different car, the 2004 Suzuki Vitara. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: DTC P0134: HO2S (Bank-1 Sensor-1) No Activity Detected Troubleshooting Chart (1 Of 2)
Courtesy of SUZUKI OF AMERICA CORP.
Fig 2: DTC P0134: HO2S (Bank-1 Sensor-1) No Activity Detected Troubleshooting Chart (2 Of 2)