Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2003 Subaru Baja AutomaticFACTORY OEM SERVICE PROCEDURE
Throttle Position (TP) Sensor: 2.5L
- 1) Turn the ignition switch to "OFF".
- Loosen the throttle position sensor holding screws. See Fig 1 .
- When using voltage meter; take out the ECM. Turn the ignition switch to "ON". Adjust the throttle position sensor to the proper position to allow the voltage signal at ECM B136 connector terminals "15" and "17" to be 0.45-0.55 volts fully closed. See Fig 2 . Tighten the throttle position sensor holding screws to 1.2 ft. lbs (1.6 N.m).
- When using Subaru Select Monitor; turn the ignition switch to "OFF". Loosen the throttle position sensor holding screws. Insert the cartridge to the Subaru Select Monitor. See Fig 3 . Connect the Subaru Select Monitor to the data link connector on left side of dash, under hood release lever.
- Turn ignition switch to "ON", and the 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 the throttle position sensor to the proper position to specifications. See THROTTLE POSITION (TP) SENSOR SPECIFICATIONS table.
- Tighten the throttle position sensor holding screws to 1.2 ft. lbs (1.6 N.m).
NOTE:
For detailed operation procedures, refer to the Subaru Select Monitor Operation Manual.
THROTTLE POSITION (TP) SENSOR SPECIFICATIONS
| Throttle Fully Closed | Reading |
|---|---|
| Throttle Opening Angle | 0.00% |
| Throttle Sensor Voltage | 0.50 Volts |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.