M20A-FKS (ENGINE CONTROL): ECM: INSTALLATION; 2023 - 2025 MY Corolla Corolla Hatchback [03/2023

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}

*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

6. INSTALL AIR CLEANER CAP WITH AIR CLEANER HOSE

Click here

7. INSTALL INLET NO. 1 AIR CLEANER

Click here

8. INSTALL RADIATOR SUPPORT OPENING COVER

for Hatchback except GR
Click here
for Sedan with Illumination
Click here
for Sedan without Illumination
Click here

9. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL

Click here

10. VEHICLE IDENTIFICATION NUMBER (VIN) REGISTRATION

Click here

11. ECU CONFIGURATION (for K121)

Click here

12. UPDATE ECU SECURITY KEY

Click here

13. PERFORM INITIALIZATION

Click here

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