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Home >> Toyota >> 2020 >> Corolla L >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 112 (Engine Mechanical System (M20A-FKS) - Service Information (3 Of 6)) >> Engine Assembly >> Removal [09/2024 - ] >> 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 engine assembly 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
Replacement of ECM Vehicle Identification Number (VIN) registration MIL comes on Refer to REGISTRATION [06/2018 - ]
ECU configuration - Refer to ECU CONFIGURATION [09/2022 - ]
Update ECU security key Vehicle Control History (RoB) are stored Refer to UPDATE ECU SECURITY KEY [09/2022 - ]
ECU communication ID registration (Immobiliser system) Engine start function Refer to REGISTRATION [11/2022 - ]
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*1
Refer to REGISTRATION [11/2022 - ]
Replacement of ECM*2 Code registration (Immobiliser system)
  • Engine start
  • Telematics System
Refer to REGISTRATION [11/2022 - ]
  • Replacement of engine assembly
  • Gas leak from exhaust system is repaired
Inspection After Repair
  • Poor idle, etc.
  • Engine start function, etc.
Refer to INITIALIZATION [11/2022 - ]
Replacement of continuously variable transaxle assembly
  • Input transaxle compensation code into ECM
  • Perform reset memory
  • CVT oil pressure calibration
  • Perform road test to allow ECM to learn
  • Large shift shock
  • Deterioration of fuel efficiency
Initialization: Refer to INITIALIZATION [03/2023 - ]
Registration: Refer to REGISTRATION [03/2023 - ]
Replacement of ECM
  • Transfer transaxle compensation code*5
  • Reset transaxle compensation code*6
  • CVT oil pressure calibration
  • Perform road test to allow ECM to learn
  • Large shift shock
  • Deterioration of fuel efficiency
Initialization: Refer to INITIALIZATION [03/2023 - ]
Registration: Refer to REGISTRATION [03/2023 - ]
Front wheel alignment adjustment
  • Perform "Reset Memory"
  • Perform "Calibration"
  • VSC is disabled or malfunctions
  • DTCs are output
  • Slip indicator light illuminates
  • ABS warning light illuminates
w/ Electric Parking Brake System: Refer to UTILITY [11/2022 - ]
w/o Electric Parking Brake System: Refer to UTILITY [09/2024 - ]
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 [03/2023 - ]
  • Steering gear assembly*4
  • No. 2 steering intermediate shaft assembly*4
for TMC Made 
  1. End position initial setting
- Refer to CALIBRATION [09/2022 - ]

*1: w/ Steering Lock Function

*2: w/o Smart Key System

*3: w/ Smart Key System

*4: If matchmarks were not placed when removing parts related to steering operation, perform end position initial setting.

*5: If transaxle compensation code read from ECM

*6: If transaxle compensation code not read from ECM

WARNING:
  • The engine assembly with transaxle is very heavy. Be sure to follow the procedure described in the repair information, or the engine lifter may suddenly drop or the engine assembly with transaxle may fall off the engine lifter.
    GTY566510Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *a An Object Exceeding Weight Limit of Engine Lifter
  • To prevent burns, do not touch the engine, exhaust manifold or other high temperature components while the engine is hot.
    GTY563663Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT: 

When the cable is disconnected / reconnected to the battery terminal, systems temporarily stop operating. However, each system has a function that completes learning the first time the system is used.

LEARNING COMPLETES WHEN VEHICLE IS DRIVEN

Effect/Inoperative Function when Necessary Procedure not Performed Necessary Procedure Link
Front Camera System Drive the vehicle straight ahead at 15 km/h (9 mph) or more for 1 second or more. Refer to INITIALIZATION [11/2022 - ]
LEARNING COMPLETES WHEN VEHICLE IS OPERATED NORMALLY

Effect/Inoperative Function when Necessary Procedure not Performed Necessary Procedure Link
Power Door Lock Control System
  • Back door opener*1
Perform door unlock operation with door control switch or electrical key transmitter sub-assembly switch. Refer to INITIALIZATION [11/2022 - ]

*1: for Hatchback