Electric Throttle Body System Operation Check

Turn off ignition switch.
Remove engine cover.
Remove air cleaner outlet hose (1). See AIR CLEANER ASSEMBLY REMOVAL AND INSTALLATION .

Fig 1: Identifying Air Cleaner Outlet Hose
Courtesy of SUZUKI OF AMERICA CORP.
Check that there isn't any foreign matter caught between throttle valve (1) and throttle body (2). If there is, take it out after removing throttle body and clean inside of throttle body thoroughly. See THROTTLE BODY REMOVAL AND INSTALLATION .

Fig 2: Identifying Throttle Valve And Throttle Body
Courtesy of SUZUKI OF AMERICA CORP.
Check throttle valve (1) operation as follows.
If faulty condition is found, replace throttle body. See THROTTLE BODY REMOVAL AND INSTALLATION .

Throttle valve default position "a":

22° - 27° from completely closed position (1)

Fig 3: Identifying Throttle Valve Position
Courtesy of SUZUKI OF AMERICA CORP.
1. Check that throttle valve (1) moves smoothly from fully closed position to fully open position with your finger.
2. Check that throttle valve returns to default position when you move finger off throttle valve at fully closed position and fully open position.
  
  Fig 4: Identifying Throttle Valve
  Courtesy of SUZUKI OF AMERICA CORP.
Turn ignition switch to ON position.
Check electric throttle body system as follows.
If faulty condition is found, go to step 8).
1. Depress accelerator pedal gradually and check that throttle valve moves smoothly until it opens fully.
2. Release accelerator pedal and check that throttle valve moves back to default position.
Check the following.
If check results are satisfactory, replace throttle body.
- Wire harness and connections
- APP sensor. See ACCELERATOR PEDAL POSITION (APP) SENSOR ON-VEHICLE INSPECTION .
- TP sensor:
  Refer to THROTTLE POSITION (TP) SENSOR PERFORMANCE CHECK .
- Throttle actuator:
  Refer to THROTTLE ACTUATOR CHECK .