THROTTLE BODY INSTALLATION

INSTALL THROTTLE BODY ASSEMBLY
1. Connect the No. 4 water by-pass hose and No. 5 water by-pass hose to the throttle body assembly.
  
  Note
  
  Position the claws of the clamps as shown in the illustration.
2. Set the throttle body assembly and new gasket with the 2 stud bolts.
3. Using a "TORX" socket E6, tighten the 2 stud bolts.
  
  Torque:
  
  5.0 N*m { 51 kgf*cm, 44 in.*lbf }
4. Install the 2 bolts and 2 nuts.
  
  Torque:
  
  10 N*m { 102 kgf*cm, 7 ft.*lbf }
5. Connect the No. 4 water by-pass hose with the hose clamp.
6. Connect the No. 5 water by-pass hose with the hose clamp.
7. Connect the throttle body connector.
INSTALL AIR CLEANER CAP SUB-ASSEMBLY
1. Install the air cleaner cap sub-assembly with air cleaner hose and lock the 2 clamps.
  
  Tech Tips
  
  Tightening torque for the hose clamp located between the air cleaner cap sub-assembly and air cleaner hose assembly is as follows.
  
  Torque:
  
  4.0 N*m { 41 kgf*cm, 35 in.*lbf }
2. Connect the air cleaner hose to the throttle body with the hose clamp.
  
  Torque:
  
  4.0 N*m { 41 kgf*cm, 35 in.*lbf }
3. Connect the 2 ventilation hoses with the 2 hose clamps.
4. Connect the mass air flow meter connector and wire harness clamp.
ADD ENGINE COOLANT
Note

Before adding coolant, turn the A/C switch OFF.

Total capacity

11.9 liters (12.6 US qts, 10.5 Imp. qts)
1. Tighten the radiator drain cock plug by hand.
2. Tighten the 2 cylinder block drain cock plugs.
  
  Torque:
  
  13 N*m { 133 kgf*cm, 10 ft.*lbf }
3. Add TOYOTA Super Long Life Coolant (SLLC) into the radiator reservoir.
  
  Capacity
  
  Approximately 5.0 liters (5.3 US qts, 4.4 Imp. qts)
  Tech Tips
  - LEXUS vehicles are filled with TOYOTA SLLC at the factory. In order to avoid damage to the engine cooling system and other technical problems, only use TOYOTA SLLC or similar high quality ethylene glycol based non-silicate, non-amine, non-nitrite, non-borate coolant with long-life hybrid organic acid technology (coolant with long-life hybrid organic acid technology consists of a combination of low phosphates and organic acids).
  - Contact any authorized LEXUS dealer or repairer or another duly qualified and equipped professional for further details.
  - Thermostat opening timing can be confirmed by squeezing the inlet radiator hose and sensing vibrations when the coolant starts to flow inside the hose.
4. Further add coolant into the reservoir until it reaches the FULL line.
5. Squeeze the No. 1 and No. 2 radiator hoses several times, and then check the coolant level.
  
  If the coolant level is low, add coolant.
6. Using a 6 mm socket hexagon wrench, install the vent plug.
  
  Torque:
  
  1.5 N*m { 15 kgf*cm, 13 in.*lbf }
7. Bleed air from the cooling system.
  
  Note
  
  Before starting the engine, turn the A/C switch off.
  1. While idling the engine for approximately 10 minutes, make sure that the coolant remains at the FULL line by adding coolant as necessary.
  2. After idling the engine for 10 minutes, add coolant to the level shown in the illustration.
    
    Capacity
    
    Approximately 2.5 to 3.5 liters (2.6 to 3.7 US qts, 2.2 to 3.1 Imp.qts)
  3. Close the radiator reservoir cap, and run the engine at 1500 to 2000 rpm for 5 minutes.
    
    Tech Tips
    
    Thermostat opening timing can be confirmed by squeezing the No. 1 radiator hose and sensing vibrations when the SLLC starts to flow inside the hose.
    
    CAUTION:
    
    When squeezing the radiator hose:
    
    Wear protective gloves.
    
    Be careful as the radiator hose is hot.
    
    Keep your hands away from the radiator fan.
8. Stop the engine and wait until the coolant cools down to ambient temperature.
  
  CAUTION:
  
  Do not remove the radiator reservoir cap while the engine and radiator are still hot. Pressurized, hot coolant and steam may be released and cause serious burns.
9. Check the coolant level.
  
  If the coolant level is below the FULL line, add coolant until it reaches the FULL line.
INSPECT FOR ENGINE COOLANT LEAK
Note

Before performing each inspection, turn the A/C switch OFF.

CAUTION:

Do not remove the radiator reservoir cap while the engine and radiator are still hot. Pressurized, hot engine coolant and steam may be released and cause serious burns.
1. Fill the radiator with coolant and attach a radiator cap tester.
2. Warm up the engine.
3. Using the radiator cap tester, increase the pressure inside the radiator to 118 kPa (1.2 kgf/cm², 17 psi), and check that the pressure does not drop.
  
  If the pressure drops, check the hoses, radiator and water pump for leaks. If no external leaks are found, check the heater core, cylinder block and head.
INSTALL V-BANK COVER SUB-ASSEMBLY
1. Engage the 4 clips to install the V-bank cover sub-assembly.
  Note
  
  Be sure to engage the clips securely.
  
  Do not apply excessive force or hit the cover to engage the clips. This may cause the cover to break.
INSTALL ENGINE UNDER COVER

Total capacity
11.9 liters (12.6 US qts, 10.5 Imp. qts)

Capacity
Approximately 5.0 liters (5.3 US qts, 4.4 Imp. qts)

Capacity
Approximately 2.5 to 3.5 liters (2.6 to 3.7 US qts, 2.2 to 3.1 Imp.qts)

PERFORM INITIALIZATION

Note

Be sure to perform this procedure after replacing the ECM or throttle body assembly.
After cleaning the throttle valve or removing and reinstalling any throttle body component, then perform the following procedure.

Disconnect the cable from negative battery terminal. Wait at least 60 seconds and reconnect the cable to negative battery terminal.
Turn the engine switch on (IG) without operating the accelerator pedal.

Note

If the accelerator pedal is operated, perform the above steps again.
Connect the intelligent tester to the DLC3 and clear the DTCs Click here.

Start the engine and check that the MIL is not illuminated and that the idle speed is within the specified range when the A/C is switched off after the engine is warmed up.

standard

Condition	Engine Idle Speed
A/C switched off	700 to 800 rpm

Note

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

Enter the following menus: Powertrain/ Engine and ECT/ Data List/ Throttle Pos. Sensor Output. Fully depress the accelerator pedal and check that the value is 60% or more.
Perform a road test and confirm that there are no abnormalities.