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Home >> Toyota >> 2025 >> Prius Plug-In Hybrid SE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 17 (Motor Generator Control System (HEV) - Diagnostic Codes (1 Of 5)) >> MOTOR GENERATOR CONTROL SYSTEM (for M20A-FXS) >> DTC P0A1B-1F: Generator Control Module Circuit Intermittent [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 - ]

    HINT: 

    1. P0A1B-1F may be output as a result of the malfunction indicated by the DTCs in table below.
      1. The chart above is listed in inspection order of priority.
      2. Check DTCs that are output at the same time by following the listed order. (The main cause of the malfunction can be determined without performing unnecessary inspections.)
    Malfunction Content System Relevant DTC
    Communication malfunction Hybrid control system U0110-87 Lost Communication with Drive Motor Control Module "A" Missing Message