Throttle Position Sensor: Adjustment

WARNING: This page is about a different car, the 2003 Subaru Outback, 2003 Subaru Legacy, and 2003 Subaru Baja. However, it is still accessible from the selected car via links, so may be relevant.

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
  1. (B135) No. 13 - (B135) No. 19/0.45 - 0.55V [Fully closed.]
  Fig 2: Checking Voltage Between Terminals
  Courtesy of SUBARU OF AMERICA, INC.
4. Tighten throttle position sensor holding screws.
  1. 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.
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
1. Throttle opening angle 0.00%
2. Throttle sensor voltage 0.50 V
Tighten throttle position sensor holding screws.
1. 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.