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.
Transmission Control Module (TCM): Installation
- When replacing the TCM, be sure to perform [Start count reading ECU to SSM] before operation and perform [Start count writing SSM to ECU] after operation. Refer to AUTO START STOP (DIAGNOSTICS)>WORK SUPPORT>NOTE .
- When [Start count reading ECU to SSM] cannot be performed due to TCM malfunction, be sure to replace the starter and fuel pump relay at the same time. Refer to STARTING/CHARGING SYSTEMS (H4DO)>STARTER . Refer to FUEL INJECTION (FUEL SYSTEMS) (H4DO)>FUEL PUMP RELAY .
- Install the TCM.
Tightening torque:
7 N.m (0.7 kgf-m, 5.2 ft-lb)
- Connect the connector.NOTE: Move the lock lever and confirm that a clicking sound is heard.
- Install the transmission case cover (front).NOTE:
- Insert the transmission case cover (front) between transmission case cover (rear) and transmission body.
- When inserting, be careful that the insulator inside transmission case cover is not turned over.
Tightening torque:
7 N.m (0.7 kgf-m, 5.2 ft-lb)
- Install the pitching stopper. Refer to CONTINUOUSLY VARIABLE TRANSMISSION (TR580)>TRANSMISSION MOUNTING SYSTEM>INSTALLATION>PITCHING STOPPER .
- Connect the ground cord.
Tightening torque:
32.3 N.m (3.3 kgf-m, 23.8 ft-lb)
- Install the air intake boot. Refer to INTAKE (INDUCTION) (H4DO)>AIR INTAKE BOOT>INSTALLATION .
- Connect the ground terminal to battery sensor. Refer to REPAIR CONTENTS>NOTE>BATTERY .
- Perform [Clear AT learning value] and [AT learning mode] using the Subaru Select Monitor. Refer to CONTINUOUSLY VARIABLE TRANSMISSION (TR580)>AT LEARNING .
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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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