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.
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HOMESERVICE MANUALSSUBARU2004BAJA BASE, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 143 (AUTOMATIC TRANSMISSION (DIAGNOSTICS))
2004 Subaru Baja Base, Standard
Section 143 (Automatic Transmission (Diagnostics))
2004 Subaru Baja Base, StandardSECTION Section 143 (Automatic Transmission (Diagnostics))
WARNING: This page is about a different car, the 2004 Subaru Impreza. However, it is still accessible from the selected car via links, so may be relevant.
- Basic Diagnostic Procedure
- Check List for Interview
- General Description
- Electrical Components Location
- Transmission Control Module (TCM) I/O Signal
- Subaru Select Monitor
- Read Diagnostic Trouble Codes
- Inspection Mode
- Clear Memory Mode
- AT OIL TEMP Warning Light Display
- List of Diagnostic Trouble Codes
- Diagnostic Procedure for AT OIL TEMP Warning Light
- Diagnostic Procedure for Select Monitor Communication
- Diagnostic Procedure with Diagnostic Trouble Codes
- DTC 11: Engine Speed Signal
- DTC 23: Mass Air Flow Signal (Turbo Model)
- DTC 27: ATF Temperature Sensor
- DTC 31: Throttle Position Sensor
- DTC 33: Front Vehicle Speed Sensor
- DTC 36: Torque Converter Turbine Speed Sensor
- DTC 38: Torque Control Signal
- DTC 45: Intake Manifold Pressure Signal (Non-Turbo Model)
- DTC 71: Shift Solenoid 1
- DTC 72: Shift Solenoid 2
- DTC 73: Low Clutch Timing Solenoid
- DTC 74: 2-4 Brake Timing Solenoid
- DTC 75: Line Pressure Duty Solenoid
- DTC 76: 2-4 Brake Duty Solenoid
- DTC 77: Lock-Up Duty Solenoid
- DTC 79: Transfer Duty Solenoid
- DTC 93: Rear Vehicle Speed Sensor
- Diagnostic Procedure without Diagnostic Trouble Codes
- Symptom Related Diagnostic
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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.