WARNING: This page is about a different car, the 2004 Suzuki Aerio. However, it is still accessible from the selected car via links, so may be relevant.
SUZUKI scan tool
TP sensor voltage
When throttle is fully close: 0.70 +/- 0.15 V
When throttle is fully open: 4.0 +/- 0.5 V
Fig 1: Checking "TP Sensor Volt" Value Displayed On Scan Tool