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Section 53 (Transmission Control System): General Description: Preparation Tool: Other

WARNING: This page is about a different car, the 2022 Subaru WRX. However, it is still accessible from the selected car via links, so may be relevant.
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KTC connector terminal tool (part number: ECC-1T) Used for pulling out the terminals.
NOTE:

A flat tip precision screwdriver with a tip width of 1.3 mm (0.05 in) or less can also be used. 

Circuit tester Used for measuring resistance, voltage and current.