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Home >> Toyota >> 2022 >> Corolla Cross L, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 26 (Hybrid Control System - Diagnostic Codes (1 Of 3)) >> Hybrid Control System >> DTC P0688-1F: ECM/PCM Power Relay Sense Circuit Intermittent [11/2022 - ] >> Monitor Description

Monitor Description

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The hybrid vehicle control ECU 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 will illuminate the MIL and store a DTC.

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