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Home >> Lexus >> 2024 >> RX 500h >> Repair and Diagnosis >> External Pages >> Different car >> Section 66 (Hybrid Control System - Diagnostic Codes (7 Of 7) & Circuit Tests (1 Of 2)) >> HYBRID CONTROL SYSTEM (for PHEV Model) >> ECU Power Source Circuit [08/2023 - ] >> Description

ECU Power Source Circuit [08/2023 - ]: Description

WARNING: This page is about a different car, the 2025 Lexus RX 450h+ and 2024 Lexus RX 450h+. However, it is still accessible from the selected car via links, so may be relevant.

If the ignition switch is ON, the hybrid vehicle control ECU applies current to the MREL terminal to turn the IGCT SCENE relay on. This supplies power to the +B1 and +B2 terminals.

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