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Home >> Toyota >> 2025 >> Prius Plug-In Hybrid SE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (Hybrid Battery System (HEV) - Diagnostic Codes (2 Of 2), Symptom Tests & Circuit Tests) >> HYBRID BATTERY SYSTEM (for M20A-FXS) >> DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message [12/2022 - ] >> Description

DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message [12/2022 - ]: Description

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The battery ECU assembly transmits and receives signals via CAN communication to and from the ECM.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate DTC Output from Priority Note
U0100-87 Lost Communication with ECM/PCM "A" Missing Message A CAN communication error between the battery ECU assembly and ECM (CAN communication system malfunction) occurs
(1 trip detection logic)
CAN communication system Comes on Master Warning:
Comes on
HV Battery B SAE Code: U0100