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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Engine Mechanical >> Starter >> Stop And Start System - Diagnostic Codes (3 Of 3) & Circuit Tests (1 Of 3) >> Stop And Start System >> Backup Boost Converter Circuit [12/2019 - 10/2022] >> Caution / Notice / Hint

Caution / Notice / Hint

NOTE:
  • Before replacing the engine stop and start ECU, read the number of starter operations and write it into a new engine stop and start ECU.

    Refer to REGISTRATION [12/2019 - 10/2022]

  • After replacing the engine stop and start ECU or air conditioning amplifier assembly, reset and perform learning of the air conditioning information in the engine stop and start ECU.

    Refer to REGISTRATION [12/2019 - 10/2022]

  • After replacing the engine stop and start ECU or airbag sensor assembly, clear and calibrate the deceleration sensor zero point in the engine stop and start ECU.

    Refer to REGISTRATION [12/2019 - 10/2022]

  • After replacing the engine stop and start ECU assembly, perform learning of the external backup boost converter (eco run vehicle converter assembly).

    Refer to REGISTRATION [12/2019 - 10/2022]

  • Inspect the fuses for circuits related to this system before performing the following procedure.
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