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Home >> Toyota >> 2019 >> Prius LE >> Repair and Diagnosis >> External Pages >> Different car >> Section 270 (Hybrid Battery System - Diagnostic Codes (P1AC4-U1150) & Circuit Tests (Lithium-Ion)) >> HYBRID BATTERY SYSTEM (for LITHIUM-ION BATTERY) >> DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message [08/2020 - ] >> Monitor Description

Monitor Description

WARNING: This page is about a different car, the 2022 Toyota Avalon and 2021 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.

If the battery ECU assembly detects a problem with CAN communication with the ECU, it will illuminate the MIL and store a DTC.

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