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Home >> Toyota >> 2021 >> Mirai Limited >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> Hybrid Control System - Diagnostic Codes (18 Of 18) & Circuit Tests (1 Of 3) >> Hybrid Control System >> DTC U0424-81: HVAC Control Module to Hybrid Powertrain Control Module Invalid Serial Data Received [11/2020 - 12/2023] >> Confirmation Driving Pattern

Confirmation Driving Pattern

HINT: 

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

Refer to UTILITY [11/2020 - ]

  1. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  2. Turn the ignition switch off and wait for 10 minutes or more.
  3. Wait for 1 minute or more with the vehicle stopped, the ignition switch to ON (READY), park (P) selected and the air conditioning system on (Lo/COOL MAX, blower speed HI).
  4. Turn the air conditioning system off and wait for 10 seconds or more with the ignition switch to ON (READY).
  5. Enter the following menus: Powertrain / EV / Utility / All Readiness.
  6. 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, perform driving pattern again.