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Home >> Lexus >> 2024 >> RX 500h >> Repair and Diagnosis >> External Pages >> Different car >> Section 10 (Engine Control System - Diagnostic Codes (10 Of 10), Symptom Tests (1 Of 2) & Circuit Tests (1 Of 2)) >> SFI SYSTEM (for Gasoline Model) >> Starter Signal Circuit [10/2022 - ] >> Description

Starter Signal Circuit [10/2022 - ]: Description

WARNING: This page is about a different car, the 2025 Lexus RX 350, 2024 Lexus RX 350, and 2023 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.

While the engine is being cranked, current flows from the terminal STAR of the certification ECU (smart key ECU assembly) to terminal STA of the ECM (STA signal).