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Circuit description

WARNING: This page is about a different car, the 2014 Subaru BRZ. However, it is still accessible from the selected car via links, so may be relevant.

When the ignition switch is turned to ON, IGSW signal is input into the engine control computer. As a result, the internal transistor is turned on, an electric current flows through the coil of EFI MAIN1 relay to close the relay contact, and then the power is supplied to +B and +B2 terminals of the engine control computer.

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