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Home >> Toyota >> 2020 >> Corolla L >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 20 (Engine Control System (M20A-FKS) - Service Information (2 Of 2)) >> ECM >> Removal [03/2019 - 09/2022] >> Caution / Notice / Hint

Caution / Notice / Hint

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

The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during ECM removal/installation are shown below.

NECESSARY PROCEDURES AFTER PARTS REMOVED/INSTALLED/REPLACED

Replaced Part or Performed Procedure Necessary Procedure Effect/Inoperative Function when Necessary Procedure not Performed Link
Battery terminal is disconnected/reconnected Perform steering sensor zero point calibration Lane Control System (for Gasoline Model) Refer to INITIALIZATION [06/2018 - 09/2022]
Pre-collision System (for Gasoline Model)
Lighting System (w/ AFS) (EXT)
Initialize back door lock*1 Power Door Lock Control System (for Hatchback, Gasoline Model) Refer to INITIALIZATION [06/2018 - 09/2022]
Replacement of ECM Vehicle Identification Number (VIN) registration MIL comes on Refer to REGISTRATION [06/2018 - ]
ECU communication ID registration (Immobiliser system) Engine start function Refer to REGISTRATION [01/2019 - 09/2019] , or refer to REGISTRATION [09/2019 - 04/2020] , or refer to REGISTRATION [04/2020 - 09/2022]
  • Perform reset memory
  • CVT oil pressure calibration
  • Perform road test to allow TCM to learn
  • Large shift shock
  • Deterioration of fuel efficiency
Refer to INITIALIZATION [06/2018 - 09/2022] for Initialization
Refer to REGISTRATION [06/2018 - 09/2024] for Registration
Replacement of ECM*2 Code registration (Smart Key System (for Gasoline Model, Start Function))
  • Wireless Door Lock Control System (for Gasoline Model with Smart Key System)
  • Smart Key System (for Gasoline Model, Entry Function)
  • Smart Key System (for Gasoline Model, Start Function)
  • Steering lock function
Refer to REGISTRATION [01/2019 - 09/2019] , or refer to REGISTRATION [09/2019 - 04/2020] , or refer to REGISTRATION [04/2020 - 09/2022]
Replacement of ECM*3 Code registration (Immobiliser system) Engine start Refer to REGISTRATION [01/2019 - 09/2019] , or refer to REGISTRATION [09/2019 - 04/2020] , or refer to REGISTRATION [04/2020 - 09/2022]

*1: for Hatchback

*2: w/ Smart Key System

*3: w/o Smart Key System

NOTE:
  • After the ignition switch is turned off, the radio and display receiver assembly records various types of memory and settings. As a result, after turning the ignition switch off, make sure to wait at least 85 seconds before disconnecting the cable from the negative (-) battery terminal. (for Navigation System and Audio and Visual System (for Gasoline Model))
  • If the ECM has been struck or dropped, replace it.
  • Perform Vehicle Identification Number (VIN) registration when replacing the ECM.

    Refer to REGISTRATION [06/2018 - ]