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Home >> Lexus >> 2024 >> TX 350 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 83 (Hybrid Control System - Diagnostic Codes (1 Of 5)) >> HYBRID CONTROL SYSTEM (for 1Motor-HEV Model) >> DTC P0688-1F: ECM/PCM Power Relay Sense Circuit Intermittent [09/2023 - ] >> Monitor Description

Monitor Description

WARNING: This page is about a different car, the 2024 Lexus TX 500h. However, it is still accessible from the selected car via links, so may be relevant.

The hybrid vehicle control ECU assembly monitors the +B power source voltage and detects momentary interruptions. If there is a momentary interruption in the +B power source voltage, the hybrid vehicle control ECU assembly will illuminate the MIL and store a DTC.

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