Starter Signal Circuit [01/2019 - 09/2022]: Description
WARNING: This page is about a different car, the 2022 Toyota Corolla, 2021 Toyota Corolla, 2020 Toyota Corolla, and 2019 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
While the engine is being cranked, current flows from terminal ST1 of the ignition or starter switch assembly*1 or terminal STAR of the certification ECU (smart key ECU assembly)*2 to the park/neutral position switch assembly*3 or clutch start switch assembly*4 and to terminal STA of the ECM (STA signal).
*1: w/o Smart Key System
*2: w/ Smart Key System
*3: for CVT models
*4: for Manual Transaxle models