Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000028GQX
Model Year Start: 2023 Model: Corolla Prod Date Range: [11/2022 -           ]
Title: 2ZR-FXE (EMISSION CONTROL): EGR COOLER: REMOVAL; 2023 - 2025 MY Corolla Corolla HV [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 EGR pipe with cooler sub-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 inverter with converter assembly

ECU configuration

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

Resolver learning

  • DTCs are stored
  • Slight vibration at a vehicle speed of 5 km/h (3 mph) or less
  • Shock or vibration during acceleration

2023 - 2025 MY Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: MOTOR GENERATOR CONTROL SYSTEM (for LITHIUM-ION BATTERY with PA10): UTILITY

Replacement of ECM

Vehicle Identification Number (VIN) registration

MIL comes on

2020 - 2025 MY Corolla Corolla HV [01/2019 -        ]; 2ZR-FXE (ENGINE CONTROL): SFI SYSTEM: REGISTRATION

ECU configuration

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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

  • Replacement of EGR valve assembly
  • Gas leak from exhaust system is repaired

Inspection after repair

  • Poor idle, etc.
  • Engine start function, etc.

2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; 2ZR-FXE (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION

NOTICE:

  • After the ignition switch is turned off, the radio and display receiver assembly recordsvarious types of memory and settings. As a result, after turning the ignition switch off,make sure to wait at least 3 minutes before disconnecting the cable from the negative(-) auxiliary battery terminal.
  • When the cable is disconnected from the negative (-) auxiliary battery terminal and thesecurity lock setting has been enabled, multi-display operations will be disabled uponnext startup unless the password is entered. Be sure to check the security lock settingbefore disconnecting the cable from the negative (-) auxiliary battery terminal. (forAudio and Visual System (for Single Knob Type))

HINT:

When the cable is disconnected / reconnected to the auxiliary 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 (for TMC Made)

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

PROCEDURE

1. DRAIN ENGINE COOLANT (for Engine)

Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; MAINTENANCE: 2ZR-FXE COOLANT (for Engine Coolant): REPLACEMENT+

2. REMOVE INVERTER WITH CONVERTER ASSEMBLY

Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: INVERTER WITH CONVERTER: REMOVAL

3. REMOVE EGR PIPE ASSEMBLY

Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; 2ZR-FXE (INTAKE / EXHAUST): INTAKE MANIFOLD: REMOVAL+

4. DISCONNECT WATER BY-PASS HOSE

(a) Slide the clip and disconnect the water by-pass hose from the EGR valve assembly.

5. DISCONNECT INLET HEATER WATER HOSE

(a) Slide the clip and disconnect the inlet heater water hose from the EGR pipe with cooler sub-assembly.

6. DISCONNECT NO. 4 WATER BY-PASS HOSE

(a) Slide the clip and disconnect the No. 4 water by-pass hose from the EGR pipe with cooler sub-assembly.

7. REMOVE EGR PIPE WITH COOLER SUB-ASSEMBLY

(a) Disconnect the EGR valve assembly connector.

(b) Remove the 2 nuts and disconnect the EGR pipe with cooler sub-assembly from the exhaust manifold (TWC: Front Catalyst).

(c) Remove the bolt and 2 nuts and disconnect the EGR pipe with cooler sub-assembly with the EGR valve assembly from the cylinder head sub-assembly and camshaft housing sub-assembly.

Bolt

Nut

(d) Using an E8 "TORX" socket wrench, remove the 2 stud bolts from the cylinder head sub-assembly and camshaft housing sub-assembly.

HINT:

If a stud bolt is deformed or the threads are damaged, replace it.

(e) Remove the EGR pipe with cooler sub-assembly with the EGR valve assembly.

(f) Remove the EGR cooler gasket from the EGR pipe with cooler sub-assembly.

(g) Slide the clip and disconnect the No. 6 water by-pass hose from the EGR pipe with cooler sub-assembly.

(h) Remove the 2 nuts and EGR pipe with cooler sub-assembly from the EGR valve assembly.

(i) Remove the EGR valve gasket from the EGR valve assembly.

(j) Using an E8 "TORX" socket wrench, remove the 3 stud bolts from the EGR pipe with cooler sub-assembly.

HINT:

If a stud bolt is deformed or the threads are damaged, replace it.