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Home >> Toyota >> 2011 >> Camry Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 194 (Automatic Transmission - U660E - (Diagnostic Codes & Circuit Tests) (Except Hybrid)) >> Automatic Transaxle System >> Circuit Test >> ECU Power Source Circuit >> Description

ECU Power Source Circuit: Description

WARNING: This page is about a different car, the 2010 Toyota Camry. However, it is still accessible from the selected car via links, so may be relevant.

When the ignition switch is turned on (IG), voltage from the ECM's MREL terminal is applied to the EFI relay. This causes the contacts of the EFI relay to close, which supplies power to terminal +B of the TCM.

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