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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 U1150-87: Lost Communication with Hybrid Powertrain Control Module (Hybrid/EV Battery Local Bus) Missing Message [12/2022 - ] >> Caution / Notice / Hint

Caution / Notice / Hint

WARNING: This page is about a different variant/trim than selected.
WARNING:

Refer to the precautions before inspecting high voltage circuit.

Refer to PRECAUTION [12/2022 - ]

NOTE:
  • After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.

    Refer to BEFORE DISCONNECTING BATTERY [12/2022 - ]

  • When disconnecting and reconnecting the auxiliary battery

    HINT: 

    When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

    Refer to AUTOMATIC LEARNING CHART [12/2022 - 03/2023] , or refer to AUTOMATIC LEARNING CHART [03/2023 - ]

  • When removing or installing the shift control ECU and shift actuator ECU, make sure there is no power supplied*1 when disconnecting or connecting the connectors.

    *1: Auxiliary battery, sub-battery, integrated capacitor, etc.

  • When disconnecting a wire harness of any component connected to the supply power of the integrated capacitor or when removing the integrated capacitor, make sure to wait 5 minutes or more after turning the ignition switch off for self-diagnosis to complete and the voltage of the integrated capacitor to discharge.