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Home >> Toyota >> 2020 >> Corolla L >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 24 (Engine Mechanical System (M20A-FKS) - Service Information (1 Of 6)) >> Cylinder Head Gasket >> Removal [06/2018 - 01/2019] >> 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 cylinder head gasket 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 Refer to INITIALIZATION [06/2018 - 09/2022]
Pre-collision system
Lighting System (w/ AFS) (EXT)
Initialize back door lock Power door lock control system 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 [06/2018 - 01/2019]
Code registration (Smart Key System (for Start Function))
  • Wireless Door Lock Control System
  • Smart Key System (for Entry Function)
  • Smart Key System (for Start Function)
  • Steering lock function
Refer to REGISTRATION [06/2018 - 01/2019]
  • Gas leak from exhaust system is repaired
  • Replacement of throttle body with motor assembly
  • Replacement of cam timing control motor with EDU assembly
  • Removal and installation of a cam timing control motor with EDU assembly
  • Replacement of camshaft timing gear assembly
  • Removal and installation of a camshaft timing gear assembly
  • Replacement of cylinder head sub-assembly
  • Replacement of camshaft (for intake or exhaust camshaft)
  • Replacement of camshaft timing exhaust gear assembly
  • Replacement of port fuel injector assembly
  • Replacement of direct fuel injector assembly
  • Replacement of fuel pump assembly (for high pressure side)
  • Replacement of spark plug
  • Replacement of ignition coil assembly
  • Replacement of EGR valve assembly
  • Replacement of knock control sensor
  • Replacement of air fuel ratio sensor (sensor 2)
Inspection After Repair
  • Poor idle, etc.
  • Engine start function, etc.
Refer to INITIALIZATION [06/2018 - 09/2019]
Replacement of continuously variable transaxle assembly
  • Input transaxle compensation code into TCM
  • Perform reset memory
  • Deceleration sensor zero point calibration
  • 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
  • Perform reset memory
  • CVT oil pressure calibration
  • Perform road test to allow TCM to learn
Suspension, tires, etc.
(The vehicle height changes because of suspension or tire replacement)
Perform headlight ECU sub-assembly LH initialization Lighting system (w/ AFS) (EXT) Refer to INITIALIZATION [06/2018 - 06/2021]
Front wheel alignment adjustment
  1. Perform "Reset Memory".
  2. Perform acceleration sensor zero point calibration and store system information memorization.
  • VSC is disabled or malfunctions
  • DTCs are output
  • Slip indicator light illuminates
  • ABS warning light illuminates
Refer to UTILITY [06/2018 - 09/2022]
CVT fluid ATF thermal degradation estimate reset The value of the Data List item "ATF Thermal Degradation Estimate" is not estimated correctly Refer to INITIALIZATION [06/2018 - 09/2022]
NOTE:
  • After the engine switch is turned off, the radio and display receiver assembly records various types of memory and settings. As a result, after turning the engine switch off, make sure to wait at least 85 seconds before disconnecting the cable from the negative (-) battery terminal. (for Audio and Visual System)
  • After the engine switch is turned off, the radio and display receiver assembly records various types of memory and settings. As a result, after turning the engine switch off, make sure to wait at least 85 seconds before disconnecting the cable from the negative (-) battery terminal. (for Navigation System)
  • This procedure includes the removal of small-head bolts. Refer to Small-Head Bolts of Basic Repair Hint to identify the small-head bolts.

    Refer to PRECAUTION [06/2018 - ]