2ZR-FAE (ENGINE CONTROL): ECM: REMOVAL; 2023 MY Corolla [09/2022

Last Modified: 05-13-2024	6.11:8.1.0	Doc ID: RM10000000270P8
Model Year Start: 2023	Model: Corolla	Prod Date Range: [09/2022 - 11/2022]
Title: 2ZR-FAE (ENGINE CONTROL): ECM: REMOVAL; 2023 MY Corolla [09/2022 - 11/2022]

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 ECM 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/ Smart Key System 2: w/o Smart Key System *3: w/ Steering Lock Function
Replacement of ECM	Vehicle Identification Number (VIN) registration	MIL comes on
	ECU communication ID registration (Immobiliser system)	Engine start function
	Reset memory Deceleration sensor zero point calibration CVT oil pressure calibration	Large shift shock Deterioration of fuel efficiency	for K313
Replacement of ECM*1	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*3
Replacement of ECM*2	Code registration (Immobiliser system)	Engine start

NOTICE:

Perform the Vehicle Identification Number (VIN) registration when replacing the ECM.

Click here

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
Pre-collision System (for TMMMS Made)	Drive the vehicle straight ahead at 35 km/h (22 mph) or more for 5 seconds or more.
Lane Tracing Assist System (for TMMMS Made)
Lane Departure Alert System (for TMMMS Made)

PROCEDURE

1. PRECAUTION

NOTICE:

After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal.

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2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

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3. REMOVE AIR CLEANER CAP WITH AIR CLEANER HOSE

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4. REMOVE RADIATOR SUPPORT OPENING COVER

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5. REMOVE INLET NO. 1 AIR CLEANER

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6. REMOVE AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY

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7. REMOVE AIR CLEANER CASE SUB-ASSEMBLY

(a) Remove the 2 bolts.

(b) Disengage the guide to remove the air cleaner case sub-assembly.

8. REMOVE ECM

(a) Disengage the claw and 2 guides to remove the No. 1 relay block cover from the No. 1 engine room relay block and No. 1 junction block assembly.

(b) Disconnect the 3 connectors from the No. 1 engine room relay block and No. 1 junction block assembly.

(c) Disengage the 2 claws to separate the engine wire from the No. 1 engine room relay block and No. 1 junction block assembly.

(d) Raise the 2 lock levers while pushing the locks on the levers, and disconnect the 2 ECM connectors.

NOTICE:

After disconnecting the ECM connectors, make sure that dirt, water or other foreign matter does not contact the connecting parts of the ECM connectors.

(e) Remove the bolt and nut.

(f) Disengage the guide to remove the ECM.

NOTICE:

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

9. REMOVE NO. 1 ECM BRACKET

(a) Remove the 2 screws and No. 1 ECM bracket from the ECM.

10. REMOVE NO. 2 ECM BRACKET

(a) Remove the 2 screws and No. 2 ECM bracket from the ECM.