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.
2001 Subaru Forester BaseFACTORY OEM SERVICE PROCEDURE
Automatic Trans: Diagnostics
- Precaution
- Pre-Inspection
- Electrical Components Location
- Schematic
- Transmission Control Module (TCM) I/O Signal
- Diagnostic Chart For On-Board Diagnostics System
- Diagnostics For On-Board Diagnostics Failed
- Diagnostic Chart With Trouble Code
- List Of Trouble Code
- Clear Memory
- DTC 11: Engine Speed Signal
- DTC 27: ATF Temperature Sensor
- DTC 31: Throttle Position Sensor
- DTC 33: Vehicle Speed Sensor 2 (Front)
- DTC 36: Torque Converter Turbine Speed Sensor
- DTC 38: Torque Control Signal
- DTC 45: Intake Manifold Pressure Signal
- 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: Vehicle Speed Sensor 1 (Rear)
- Diagnostic Chart With Select Monitor
- Basic Diagnostic Chart
- Battery Voltage
- Check Vehicle Speed Sensor 1
- Check Vehicle Speed Sensor 2
- Check Engine Speed Signal
- Check ATF Temperature Sensor
- Check Throttle Position Sensor
- Check Gear Position
- Check Line Pressure Duty Solenoid
- Check Lock-Up Duty Solenoid
- Check Transfer Duty Solenoid
- Check Throttle Position Sensor Power Supply
- Check Intake Manifold Pressure Signal
- Check Torque Converter Turbine Speed Sensor
- Check 2-4 Brake Duty Solenoid
- Check Fwd Switch
- Check Brake Switch
- Check Abs Switch
- Check Cruise Control Switch
- Check Inhibitor Switch
- Check Shift Solenoid 1
- Check Shift Solenoid 2
- Check Torque Control 1 Signal.
- Check Torque Control 2 Signal.
- Check 2-4 Brake Timing Solenoid
- Check Low Clutch Timing Solenoid
- Check Diagnosis Light
- Check Fwd Light
- General Diagnostic Table
- Engine Control Module
- Throttle Position Sensor
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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