Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001GYJM
Model Year Start: 2020 Model: Corolla Prod Date Range: [01/2019 - 11/2022]
Title: 2ZR-FAE (ENGINE CONTROL): THROTTLE BODY: INSTALLATION; 2020 - 2023 MY Corolla [01/2019 - 11/2022]

INSTALLATION

PROCEDURE

1. INSTALL THROTTLE BODY GASKET

(a) Install a new throttle body gasket to the intake manifold with the protrusion of the throttle body gasket oriented as shown in the illustration.

*a

Protrusion

2. INSTALL THROTTLE BODY ASSEMBLY

HINT:

Perform "Inspection After Repair" after replacing the throttle body assembly.

Click here 2020 - 2023 MY Corolla [01/2019 - 11/2022]; 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION

(a) w/ Stud Bolt:

(1) Install the throttle body assembly to the intake manifold with the 2 bolts and 2 nuts.

Torque:

10 N·m {102 kgf·cm, 7 ft·lbf}

NOTICE:

If the throttle body assembly has been struck or dropped, replace it.

(b) w/o Stud Bolt:

(1) Install the throttle body assembly to the intake manifold with the 4 bolts.

Torque:

10 N·m {102 kgf·cm, 7 ft·lbf}

NOTICE:

If the throttle body assembly has been struck or dropped, replace it.

(c) Connect the water by-pass hose and No. 2 water by-pass hose to the throttle body assembly and slide the 2 clips to secure them.

NOTICE:

Make sure to position each clip as shown in the illustration.

*1

Water By-pass Hose

*2

No. 2 Water By-pass Hose

*a

Front of Vehicle

*b

45° (Claw of Clip Location)

*c

Paint Mark

*d

Left Side of Vehicle

(d) Connect the throttle body assembly connector.

3. INSTALL AIR CLEANER CAP WITH AIR CLEANER HOSE

(a) Connect the air cleaner cap with air cleaner hose to the throttle body assembly and tighten the hose clamp.

Torque:

2.0 N·m {20 kgf·cm, 18 in·lbf}

NOTICE:

Align the cutout of the air cleaner hose with the protrusion of the throttle body assembly as shown in the illustration.

*a

Protrusion

*b

Cutout

*c

Top of Vehicle

*d

Front of Vehicle

(b) Connect the No. 2 ventilation hose to the cylinder head cover sub-assembly and slide the clip to secure it.

NOTICE:

Make sure to position the clip as shown in the illustration.

*a

Top of Vehicle

*b

Right Side of Vehicle

*c

45° (Claw of Clip Location)

(c) Engage the 2 guides and 2 clamps.

(d) Connect the mass air flow meter sub-assembly connector and engage the wire harness clamp.

4. ADD ENGINE COOLANT

Click here 2020 - 2023 MY Corolla [01/2019 - 11/2022]; MAINTENANCE: 2ZR-FAE COOLANT: REPLACEMENT+

5. INSPECT FOR COOLANT LEAK

Click here 2020 - 2023 MY Corolla [01/2019 - 11/2022]; 2ZR-FAE (COOLING): COOLING SYSTEM: ON-VEHICLE INSPECTION+

6. PERFORM INITIALIZATION

NOTICE:

  • Be sure to perform this procedure after removing and reinstalling the throttle body assembly or any throttle body assembly components.
  • Perform the following procedure after replacing the throttle body assembly or any throttle body assembly components. The following procedure should also be performed if the throttle body assembly is cleaned.

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Clear the DTCs.

Powertrain > Engine and ECT > Clear DTCs

(e) Perform the "Inspection After Repair".

Click here 2020 - 2023 MY Corolla [01/2019 - 11/2022]; 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION

(f) Start the engine and check that the MIL is not illuminated. After the engine is warmed up, check that the idle speed is within the specified range with the A/C switch off.

Standard Idle Speed:

for CVT

700 to 800 rpm

for Manual Transaxle

600 to 700 rpm

NOTICE:

  • Be sure to perform this step with all accessories off.
  • Make sure that the shift lever is in P or N.

(g) Enter the following menus: Powertrain / Engine and ECT / Data List / Throttle Sensor Volt %.

Powertrain > Engine and ECT > Data List

Tester Display

Throttle Sensor Volt %

(h) Fully depress the accelerator pedal and check that the value is 60% or higher.

(i) Perform a road test and confirm that there are no abnormalities.