With Scan Tool

INSPECTION [Using SUZUKI scan tool]
1. Connect SUZUKI scan tool to DLC with ignition switch OFF.
2. Warm up engine and stop it when its temperature has reached normal operating temperature (Check to make sure that they have some clearance between fast idle cam and cam follow lever.).
3. Check "THROT POS SENSOR" value displayed on scan tool under the following each condition.

When throttle is fully close: 0.50 ± 0.15 V
When throttle is fully open : 4.0 ± 0.5 V

If measured value is out of above specified range, adjust installation angle of TP sensor referring to "Adjustment".

Also check that "THROT POS SENSOR" value varies according to throttle valve opening linearly. If not, it is possible that TP sensor has failed. Replace.