Throttle Position (TP) Sensor Performance Check

Turn OFF ignition switch.
Remove air cleaner assembly. See AIR CLEANER ASSEMBLY REMOVAL AND INSTALLATION
Disconnect connector from electric throttle body assembly.
Check TP sensor (main and sub) output voltage as the following steps.
1. For TP sensor (main), arrange 3 new 1.5 V batteries (1) in series (check that total voltage is 4.5 - 5.0 V) and connect its positive terminal to "Vin" terminal (2) and negative terminal to "Ground" terminal (3) of sensor. Then using voltmeter, connect positive terminal to "Vout 1" terminal (4) of sensor and negative terminal to battery.
  
  Fig 1: Checking TP Sensor (Main And Sub) Output Voltage
  Courtesy of SUZUKI OF AMERICA CORP.
2. For TP sensor (sub), arrange 3 new 1.5 V batteries (1) in series (check that total voltage is 4.5 - 5.0 V) and connect its positive terminal to "Vin" terminal (2) and negative terminal to "Ground" terminal (3) of sensor. Then using voltmeter, connect positive terminal to "Vout 2" terminal (4) of sensor and negative terminal to battery.
  
  Fig 2: Checking Voltage
  Courtesy of SUZUKI OF AMERICA CORP.
3. Measure output voltage variation while throttle valve is opened and closed as the following specification.
  
  Fig 3: Output Voltage Variation Graph
  Courtesy of SUZUKI OF AMERICA CORP.