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Home >> Toyota >> 2025 >> Prius Plug-In Hybrid SE >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> Hybrid Battery System (PHEV) - Diagnostic Codes (4 Of 4) & Circuit Tests >> HYBRID BATTERY SYSTEM (for PHEV Model) >> DTC P31B5-49: Hybrid/EV Battery Internal Electronic Failure [03/2023 - ] >> Confirmation Driving Pattern

Confirmation Driving Pattern

HINT: 

After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

Refer to UTILITY [03/2023 - ]

  1. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  2. Turn the ignition switch off and wait for 2 minutes or more.
  3. Drive the vehicle on urban roads for approximately 10 minutes.
  4. Enter the following menus: Powertrain / HV battery / Utility / All Readiness.
  5. Check the DTC judgment result.

    HINT: 

    • If the judgment result shows NORMAL, the system is normal.
    • If the judgment result shows ABNORMAL, the system has a malfunction.
    • If the judgment result shows INCOMPLETE or N/A, perform driving pattern again.