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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 [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 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 (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]
Replacement of ECM*3 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*2 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]
  • 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] , or refer to INITIALIZATION [09/2019 - 04/2020] , or refer to INITIALIZATION [04/2020 - 11/2022]
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] , or refer to INITIALIZATION [06/2021 - 09/2022]
Front wheel alignment adjustment
  • Perform "Reset Memory"
  • 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
 w/ Electric Parking Brake System: Refer to UTILITY [06/2018 - 09/2022]
w/o Electric Parking Brake System: Refer to UTILITY [03/2019 - 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] for K120

*1: for Hatchback

*2: w/o Smart Key System

*3: w/ 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))
  • 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 - ]

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