Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000002BA1G
Model Year Start: 2023 Model: Corolla Hatchback Prod Date Range: [03/2023 -           ]
Title: M20A-FKS (ENGINE MECHANICAL): ENGINE UNIT: REMOVAL; 2023 - 2025 MY Corolla Corolla Hatchback [03/2023 -        ]

REMOVAL

CAUTION / NOTICE / HINT

The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during engine unit 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

*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

Replacement of ECM

Vehicle Identification Number (VIN) registration

MIL comes on

2019 - 2025 MY Corolla Corolla Hatchback [06/2018 -        ]; M20A-FKS (ENGINE CONTROL): SFI SYSTEM: REGISTRATION

for K121

  • ECU configuration

-

2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; SETUP: WHEN REPLACING OR REMOVING/INSTALLING PARTS: ECU CONFIGURATION

Update ECU security key

Vehicle Control History (RoB) are stored

2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; SETUP: WHEN REPLACING OR REMOVING/INSTALLING PARTS: UPDATE ECU SECURITY KEY

ECU communication ID registration (Immobiliser system)

Engine start function

2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [11/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION

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

2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [11/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION

Replacement of ECM*2

Code registration (Immobiliser system)

  • Engine start
  • Telematics System

2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: IMMOBILISER SYSTEM (w/o Smart Key System): REGISTRATION

  • Replacement of engine assembly
  • 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 engine coolant temperature sensor
  • 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.

2023 - 2025 MY Corolla Corolla Hatchback [11/2022 -        ]; M20A-FKS (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION

Replacement of continuously variable transaxle assembly

for K120

  • Input transaxle compensation code into TCM
  • Perform reset memory
  • CVT oil pressure calibration
  • Perform road test to allow TCM to learn
  • Large shift shock
  • Deterioration of fuel efficiency

Initialization: 2023 - 2025 MY Corolla Corolla Hatchback [11/2022 -        ]; K120 / K121 (CVT): K120 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: INITIALIZATION

Registration: 2019 - 2025 MY Corolla Corolla Hatchback [06/2018 -        ]; K120 / K121 (CVT): K120 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: REGISTRATION

for K121

  • 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: 2023 - 2025 MY Corolla Corolla Hatchback [03/2023 -        ]; K120 / K121 (CVT): K121 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: INITIALIZATION

Registration: 2023 - 2025 MY Corolla Corolla Hatchback [03/2023 -        ]; K120 / K121 (CVT): K121 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: REGISTRATION

Replacement of ECM

for K120

  • Perform reset memory
  • CVT oil pressure calibration
  • Perform road test to allow TCM to learn
  • Large shift shock
  • Deterioration of fuel efficiency

Initialization: 2023 - 2025 MY Corolla Corolla Hatchback [11/2022 -        ]; K120 / K121 (CVT): K120 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: INITIALIZATION

Registration: 2019 - 2025 MY Corolla Corolla Hatchback [06/2018 -        ]; K120 / K121 (CVT): K120 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: REGISTRATION

for K121

  • 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: 2023 - 2025 MY Corolla Corolla Hatchback [03/2023 -        ]; K120 / K121 (CVT): K121 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: INITIALIZATION

Registration: 2023 - 2025 MY Corolla Corolla Hatchback [03/2023 -        ]; K120 / K121 (CVT): K121 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: REGISTRATION

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: 2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [11/2022 -        ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model with Electric Parking Brake System): UTILITY

w/o Electric Parking Brake System: 2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [09/2022 -        ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model without Electric Parking Brake System TMC Made): UTILITY

CVT fluid

ATF thermal degradation estimate reset

The value of the Data List item "ATF Thermal Degradation Estimate" is not estimated correctly

for K120: 2023 - 2025 MY Corolla Corolla Hatchback [11/2022 -        ]; K120 / K121 (CVT): K120 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: INITIALIZATION

for K121: 2023 - 2025 MY Corolla Corolla Hatchback [03/2023 -        ]; K120 / K121 (CVT): K121 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: INITIALIZATION

  • Steering gear assembly*4
  • No. 2 steering intermediate shaft assembly*4

for TMC Made

  • End position initial setting

-

2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [09/2022 -        ]; POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for Gasoline Model): CALIBRATION

NOTICE:

This procedure includes the removal of small-head bolts. Refer to Small-Head Bolts of Basic Repair Hint to identify the small-head bolts.

Click here 2019 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 -        ]; INTRODUCTION: REPAIR INSTRUCTION: PRECAUTION

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.

2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; ADVANCED DRIVER ASSISTANCE SYSTEM: FRONT CAMERA SYSTEM: INITIALIZATION

Learning completes when vehicle is operated normally

Effect/Inoperative Function when Necessary Procedure not Performed

Necessary Procedure

Link

*1: for Hatchback

Power Door Lock Control System

  • Back door opener*1

Perform door unlock operation with door control switch or electrical key transmitter sub-assembly switch.

2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM: INITIALIZATION

PROCEDURE

1. REMOVE V-RIBBED BELT TENSIONER ASSEMBLY

NOTICE:

  • Do not apply or add any oil or grease to the belt tensioner to prevent abnormal noises from the belt tensioner pulley, belt squealing, etc.
  • Do not allow oil or grease to adhere to the moving parts of the belt tensioner, as this may cause malfunctions.

(a) Remove the 2 bolts and V-ribbed belt tensioner assembly from the No. 2 timing chain cover assembly.

2. DISCONNECT NO. 2 RADIATOR HOSE

(a) Slide the clip and disconnect the No. 2 radiator hose from the water inlet.

3. REMOVE NO. 2 WATER BY-PASS PIPE SUB-ASSEMBLY

(a) Slide the clip and disconnect the No. 2 water by-pass pipe sub-assembly from the water by-pass outlet sub-assembly.

(b) Remove the bolt and No. 2 water by-pass pipe sub-assembly from the water hose clamp bracket.

4. REMOVE FLOW SHUTTING VALVE (WATER BY-PASS HOSE ASSEMBLY)

(a) Remove the bolt to disconnect the flow shutting valve (water by-pass hose assembly) from the water hose clamp bracket.

(b) Slide the clip and remove the flow shutting valve (water by-pass hose assembly) from the water by-pass outlet sub-assembly.

HINT:

Use a container to catch any engine coolant which flows out of the flow shutting valve (water by-pass hose assembly) and water by-pass outlet sub-assembly.

5. REMOVE WATER HOSE CLAMP BRACKET

(a) Remove the bolt and water hose clamp bracket from the water hose clamp bracket.

(b) Remove the 2 bolts and water hose clamp bracket from the camshaft housing sub-assembly.

6. REMOVE NO. 1 EXHAUST MANIFOLD HEAT INSULATOR

for Double Wishbone Type Suspension: Click here 2023 - 2025 MY Corolla Corolla Hatchback [11/2022 -        ]; M20A-FKS (INTAKE / EXHAUST): EXHAUST MANIFOLD (for Double Wishbone Type Suspension): REMOVAL+

for Torsion Beam Type Suspension: Click here 2023 - 2025 MY Corolla Corolla Hatchback [09/2022 -        ]; M20A-FKS (INTAKE / EXHAUST): EXHAUST MANIFOLD (for Torsion Beam Type Suspension): REMOVAL+

7. REMOVE EXHAUST MANIFOLD (TWC: Front Catalyst)

for Double Wishbone Type Suspension: Click here 2023 - 2025 MY Corolla Corolla Hatchback [11/2022 -        ]; M20A-FKS (INTAKE / EXHAUST): EXHAUST MANIFOLD (for Double Wishbone Type Suspension): REMOVAL+

for Torsion Beam Type Suspension: Click here 2023 - 2025 MY Corolla Corolla Hatchback [09/2022 -        ]; M20A-FKS (INTAKE / EXHAUST): EXHAUST MANIFOLD (for Torsion Beam Type Suspension): REMOVAL+

8. REMOVE THROTTLE BODY WITH MOTOR ASSEMBLY

Click here 2020 - 2025 MY Corolla Corolla Hatchback [09/2019 -        ]; M20A-FKS (ENGINE CONTROL): THROTTLE BODY: REMOVAL+

9. REMOVE THROTTLE BODY GASKET

Click here 2020 - 2025 MY Corolla Corolla Hatchback [09/2019 -        ]; M20A-FKS (ENGINE CONTROL): THROTTLE BODY: REMOVAL+

10. REMOVE EGR COOLER ASSEMBLY

Click here 2023 - 2025 MY Corolla Corolla Hatchback [11/2022 -        ]; M20A-FKS (EMISSION CONTROL): EGR COOLER: REMOVAL+

11. REMOVE NO. 1 EGR PIPE SUB-ASSEMBLY

Click here 2023 - 2025 MY Corolla Corolla Hatchback [09/2022 -        ]; M20A-FKS (EMISSION CONTROL): EGR VALVE: REMOVAL+

12. REMOVE EGR VALVE ASSEMBLY

Click here 2023 - 2025 MY Corolla Corolla Hatchback [09/2022 -        ]; M20A-FKS (EMISSION CONTROL): EGR VALVE: REMOVAL+

13. REMOVE NO. 3 WATER BY-PASS PIPE

(a) Using an 8 mm socket wrench, remove the bolt and No. 3 water by-pass pipe from the intake manifold.

(b) Slide the clip and disconnect the No. 3 water by-pass pipe from the water outlet.

14. REMOVE INTAKE MANIFOLD STAY

Click here 2023 - 2025 MY Corolla Corolla Hatchback [11/2022 -        ]; M20A-FKS (INTAKE / EXHAUST): INTAKE MANIFOLD: REMOVAL+

15. REMOVE INTAKE MANIFOLD

Click here 2023 - 2025 MY Corolla Corolla Hatchback [11/2022 -        ]; M20A-FKS (INTAKE / EXHAUST): INTAKE MANIFOLD: REMOVAL+

16. REMOVE NO. 1 INTAKE MANIFOLD TO HEAD GASKET

Click here 2023 - 2025 MY Corolla Corolla Hatchback [11/2022 -        ]; M20A-FKS (INTAKE / EXHAUST): INTAKE MANIFOLD: REMOVAL+

17. DISCONNECT FUEL TUBE SUB-ASSEMBLY

(a) Disconnect the fuel tube sub-assembly from the fuel pump assembly.

Click here 2023 - 2025 MY Corolla Corolla Hatchback [11/2022 -        ]; M20A-FKS (FUEL): FUEL SYSTEM: PRECAUTION

(b) Remove the fuel pipe clamp from the fuel tube connector.

(c) Disconnect the fuel tube sub-assembly from the fuel delivery pipe with sensor assembly.

Click here 2023 - 2025 MY Corolla Corolla Hatchback [11/2022 -        ]; M20A-FKS (FUEL): FUEL SYSTEM: PRECAUTION

18. REMOVE NO. 1 FUEL PIPE SUB-ASSEMBLY

(a) Using an 8 mm socket wrench, remove the bolt.

(b) Using a 17 mm union nut wrench, loosen the 2 union nuts of the No. 1 fuel pipe sub-assembly.

19. REMOVE FUEL (ENGINE ROOM SIDE) PUMP ASSEMBLY (for High Pressure)

Click here 2023 - 2025 MY Corolla Corolla Hatchback [11/2022 -        ]; M20A-FKS (FUEL): FUEL PUMP (for High Pressure): REMOVAL+

20. REMOVE NO. 1 WATER BY-PASS HOSE ASSEMBLY

(a) Slide the clip and remove the plug from the No. 1 water by-pass hose assembly.

(b) Remove the bolt.

(c) Slide the 2 clips and remove the No. 1 water by-pass hose assembly from the water inlet with thermostat sub-assembly and cylinder head sub-assembly.

21. REMOVE SENSOR WIRE

(a) Disconnect the 3 connectors.

(b) Disengage the 3 clamps.

(c) Using an 8 mm socket wrench, remove the bolt and sensor wire from the water inlet with thermostat sub-assembly.

22. REMOVE NO. 6 ENGINE WIRE

(a) Disconnect the 4 connectors.

(b) Disengage the 2 clamps.

(c) Remove the 2 nuts and No. 6 engine wire from the wire harness clamp bracket.

23. REMOVE FUEL DELIVERY PIPE SUB-ASSEMBLY

Click here 2023 - 2025 MY Corolla Corolla Hatchback [11/2022 -        ]; M20A-FKS (FUEL): FUEL INJECTOR (for Port Injection): REMOVAL+

24. REMOVE FUEL DELIVERY SPACER

Click here 2023 - 2025 MY Corolla Corolla Hatchback [11/2022 -        ]; M20A-FKS (FUEL): FUEL INJECTOR (for Port Injection): REMOVAL+

25. REMOVE INJECTOR VIBRATION INSULATOR

Click here 2023 - 2025 MY Corolla Corolla Hatchback [11/2022 -        ]; M20A-FKS (FUEL): FUEL INJECTOR (for Port Injection): REMOVAL+

26. REMOVE NO. 5 ENGINE WIRE

Click here 2023 - 2025 MY Corolla Corolla Hatchback [11/2022 -        ]; M20A-FKS (FUEL): FUEL INJECTOR (for Port Injection): REMOVAL+

27. REMOVE PORT FUEL INJECTOR ASSEMBLY

Click here 2023 - 2025 MY Corolla Corolla Hatchback [11/2022 -        ]; M20A-FKS (FUEL): FUEL INJECTOR (for Port Injection): REMOVAL+

28. REMOVE FUEL DELIVERY PIPE

Click here 2023 - 2025 MY Corolla Corolla Hatchback [11/2022 -        ]; M20A-FKS (FUEL): FUEL INJECTOR (for Direct Injection): REMOVAL+

29. REMOVE DIRECT FUEL INJECTOR ASSEMBLY

Click here 2023 - 2025 MY Corolla Corolla Hatchback [11/2022 -        ]; M20A-FKS (FUEL): FUEL INJECTOR (for Direct Injection): REMOVAL+

30. REMOVE FUEL INJECTOR SEAL

Click here 2023 - 2025 MY Corolla Corolla Hatchback [11/2022 -        ]; M20A-FKS (FUEL): FUEL INJECTOR (for Direct Injection): REMOVAL+

31. REMOVE IGNITION COIL ASSEMBLY

Click here 2019 - 2025 MY Corolla Corolla Hatchback [06/2018 -        ]; M20A-FKS (ENGINE CONTROL): IGNITION COIL AND SPARK PLUG: REMOVAL+

32. REMOVE ENGINE OIL LEVEL DIPSTICK GUIDE

(a) Remove the engine oil level dipstick.

(b) Using an 8 mm socket wrench, remove the bolt and engine oil level dipstick guide from the cylinder head sub-assembly.

(c) Remove the O-ring from the engine oil level dipstick guide.

33. REMOVE WATER INLET WITH THERMOSTAT SUB-ASSEMBLY

Click here 2023 - 2025 MY Corolla Corolla Hatchback [09/2022 -        ]; M20A-FKS (COOLING): THERMOSTAT (w/ Cooling Fan ECU): REMOVAL+

34. REMOVE ENGINE WATER PUMP ASSEMBLY (WATER INLET HOUSING)

(a) Remove the 4 bolts, engine water pump assembly (water inlet housing) and gasket from the cylinder block sub-assembly.

35. REMOVE NO. 3 EXHAUST MANIFOLD HEAT INSULATOR

(a) Remove the 2 bolts and No. 3 exhaust manifold heat insulator from the cylinder block sub-assembly.

36. REMOVE PURGE VALVE (PURGE VSV)

  • w/ Canister Pump Module:

    Click here 2019 - 2025 MY Corolla Corolla Hatchback [06/2018 -        ]; M20A-FKS (EMISSION CONTROL): PURGE VALVE: REMOVAL+

  • w/o Canister Pump Module:

    Click here 2022 - 2025 MY Corolla Corolla Hatchback [06/2021 -        ]; M20A-FKS (EMISSION CONTROL): PURGE VALVE (w/o Canister Pump Module): REMOVAL+

37. REMOVE VACUUM SURGE TANK

(a) Remove the bolt and vacuum surge tank from the vacuum surge tank bracket.

38. REMOVE VACUUM SURGE TANK BRACKET

(a) Using an 8 mm socket wrench, remove the 2 bolts and vacuum surge tank bracket from the camshaft housing sub-assembly.

39. REMOVE NO. 2 VENTILATION HOSE

(a) Slide the clip and remove the No. 2 ventilation hose from the cylinder head cover sub-assembly.

40. REMOVE WIRE HARNESS CLAMP BRACKET

(a) Using an 8 mm socket wrench, remove the 2 bolts and wire harness clamp bracket from the No. 1 ventilation case.

(b) Using an 8 mm socket wrench, remove the bolt and wire harness clamp bracket from the camshaft housing sub-assembly.

41. REMOVE STUD BOLT

(a) Using an E8 "TORX" socket wrench, remove the stud bolt from the timing chain cover assembly.