Throttle Position Sensor: Adjustment

Turn ignition switch to OFF.
Loosen throttle position sensor holding screws.

Fig 1: Loosening Throttle Position Sensor Holding Screws
Courtesy of SUBARU OF AMERICA, INC.
When using voltage meter;
1. Take out ECM.
2. Turn ignition switch to ON.
3. Adjust throttle position sensor to the proper position to allow the voltage signal to ECM to be in specification.
  Connector & terminal / Specified voltage
  
  (B135) No. 13 - (B135) No. 19 / 0.45 - 0.55 V
  
  [Fully closed.]
  
  Fig 2: Measuring Throttle Position Sensor Connector Voltage
  Courtesy of SUBARU OF AMERICA, INC.
4. Tighten throttle position sensor holding screws.
  Tightening torque:
  
  2.4 N.m (0.24 kgf-m, 1.7 ft-lb)
  
  Fig 3: Tightening Throttle Position Sensor Holding Screws
  Courtesy of SUBARU OF AMERICA, INC.
When using Subaru Select Monitor;
1. Turn ignition switch to OFF.
2. Loosen throttle position sensor holding screws.
  
  Fig 4: Loosening Throttle Position Sensor Holding Screws
  Courtesy of SUBARU OF AMERICA, INC.
  
  NOTE: For detailed operation procedures, refer to the SUBARU SELECT MONITOR OPERATION MANUAL.
3. Insert the cartridge to Subaru Select Monitor. < Ref. to , PREPARATION TOOL , General Description. >
4. Connect Subaru Select Monitor to the data link connector (A).
  
  Fig 5: Connecting Subaru Select Monitor To Data Link Connector
  Courtesy of SUBARU OF AMERICA, INC.
Turn ignition switch to ON, and Subaru Select Monitor switch to ON.
Select {2. Each System Check} in Main Menu.
Select {Engine Control System} in Selection Menu.
Select {1. Current Data Display & Save} in Engine Control System Diagnosis.
Select {1.12 Data Display} in Data Display Menu.
Adjust throttle position sensor to the proper position to match with the following specifications.
Condition: Throttle fully closed

Throttle opening angle 0.00%

Throttle sensor voltage 0.50 V
Tighten throttle position sensor holding screws.
Tightening torque:

2.4 N.m (0.24 kgf-m, 1.7 ft-lb)

Fig 6: Tightening Throttle Position Sensor Holding Screws
Courtesy of SUBARU OF AMERICA, INC.