Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000002AYX3
Model Year Start: 2023 Model: Corolla Hatchback Prod Date Range: [03/2023 -           ]
Title: M20A-FKS (ENGINE CONTROL): ECM: INSTALLATION; 2023 - 2025 MY Corolla Corolla Hatchback [03/2023 -        ]

INSTALLATION

CAUTION / NOTICE / HINT

NOTICE:

for K120:

  • After replacing the ECM, make sure to perform vehicle identification number (vin) registration and update ECU security key.
  • After performing the vehicle identification number (vin) registration and update ECU security key procedure, make sure to perform the initialization procedure for when the cable has been disconnected and reconnected to the negative (-) battery terminal.

for K121:

  • After replacing the ECM, make sure to perform vehicle identification number (vin) registration, ECU configuration and update ECU security key.
  • After performing the vehicle identification number (vin) registration, ECU configuration procedure and update ECU security key procedure, make sure to perform the initialization procedure for when the cable has been disconnected and reconnected to the negative (-) battery terminal.

PROCEDURE

1. INSTALL NO. 1 ECM BRACKET

(a) Install the No. 1 ECM bracket to the ECM with the 2 screws.

Torque:

4.5 N·m {46 kgf·cm, 40 in·lbf}

2. INSTALL NO. 2 ECM BRACKET

(a) Install the No. 2 ECM bracket to the ECM with the 2 screws.

Torque:

4.5 N·m {46 kgf·cm, 40 in·lbf}

3. INSTALL ECM

(a) Engage the guide to install the ECM.

NOTICE:

If the ECM has been struck or dropped, replace it.

(b) Install the bolt and nut.

Torque:

Bolt :

12.5 N·m {127 kgf·cm, 9 ft·lbf}

Nut :

8.0 N·m {82 kgf·cm, 71 in·lbf}

(c) Install the grommet.

*A

for K120

*B

for K121

*1

Grommet

(d) Engage the wire harness clamp and install the engine wire with the bolt.

Torque:

10 N·m {102 kgf·cm, 7 ft·lbf}

(e) Connect the 2 ECM connectors and lower the 2 lock levers.

NOTICE:

  • When connecting the ECM connectors, make sure that dirt, water or other foreign matter does not contact the connecting parts of the ECM connectors.
  • Be sure to securely connect the ECM connectors.

(f) Engage the 2 claws to connect the engine wire to the No. 1 engine room relay block and No. 1 junction block assembly.

(g) Connect the 3 connectors to the No. 1 engine room relay block and No. 1 junction block assembly.

(h) Engage the 2 guides and claw to install the No. 1 relay block cover to the No. 1 engine room relay block and No. 1 junction block assembly.

4. INSTALL AIR CLEANER CASE SUB-ASSEMBLY

(a) Engage the guide to install the air cleaner case sub-assembly.

(b) Install the 2 bolts.

Torque:

4.0 N·m {41 kgf·cm, 35 in·lbf}

5. INSTALL AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY

Click here 2019 - 2025 MY Corolla Corolla Hatchback [06/2018 -        ]; MAINTENANCE: M20A-FKS AIR CLEANER FILTER ELEMENT: INSTALLATION+

6. INSTALL AIR CLEANER CAP WITH AIR CLEANER HOSE

Click here 2023 - 2025 MY Corolla Corolla Hatchback [11/2022 -        ]; M20A-FKS (ENGINE CONTROL): THROTTLE BODY: INSTALLATION+

7. INSTALL INLET NO. 1 AIR CLEANER

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

8. INSTALL RADIATOR SUPPORT OPENING COVER

  • for Hatchback except GR

    Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; EXTERIOR PANELS / TRIM: FRONT BUMPER (for Hatchback except GR): INSTALLATION+

  • for Sedan with Illumination

    Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; EXTERIOR PANELS / TRIM: FRONT BUMPER (for Sedan with Illumination): INSTALLATION+

  • for Sedan without Illumination

    Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; EXTERIOR PANELS / TRIM: FRONT BUMPER (for Sedan without Illumination): INSTALLATION+

9. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL

Click here 2023 - 2025 MY Corolla Corolla Hatchback [09/2022 -        ]; MAINTENANCE: M20A-FKS BATTERY: INSTALLATION+

10. VEHICLE IDENTIFICATION NUMBER (VIN) REGISTRATION

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

11. ECU CONFIGURATION (for K121)

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

12. UPDATE ECU SECURITY KEY

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

13. PERFORM INITIALIZATION

Click here 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2023 - 08/2023]; SETUP: WHEN REPLACING OR REMOVING/INSTALLING PARTS: WORK PROCEDURE 2024 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [08/2023 -        ]; SETUP: WHEN REPLACING OR REMOVING/INSTALLING PARTS: WORK PROCEDURE

14. INITIALIZATION AFTER RECONNECTING BATTERY TERMINAL

HINT:

When disconnecting and reconnecting the battery, there is an automatic learning function that completes learning when the respective system is used.

Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; SETUP: WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL: AUTOMATIC LEARNING CHART