LS460L - Engine Contents Click a Section Tab.

LS460L - Engine Contents Click a Section Tab

Engine Overall Engine Proper Valve Mechanism Cooling System Intake and Exhaust System D-4S System PCV Engine Control System

1UR-FSE (for -A, -W) 1UR-FE (for -W, -V)
LS460L - Engine Engine Overall -A -W -V Outline V8 (90-degree), 4.6-liter, 32-valve, DOHC engine w/Dual VVT-i (VVT-iE for Intake), ETCS-i and ACIS [Engine feature] V type 90-degree, 8 cylinders, 4.6-liter, 32-valve, DOHC gasoline engine Equipment: - Dual VVT-i (Variable Valve Timing-intelligent) - VVT-iE (Variable Valve Timing-intelligent by Electric motor) for intake - ETCS-i (Electronic Throttle Control System-intelligent) - ACIS (Acoustic Control Induction System) 1UR-FSE: D-4S (Direct injection 4-stroke gasoline engine Superior) System [Direct Injection + Port Injection] 1UR-FE: Port Injection 1UR-FSE (for -A, -W) D-4S System 1UR-FE (for -W, -V) Port Injection

Engine Overall Features -A -W -V 2 High-Pressure Fuel Pumps
LS460L - Engine Engine Overall -A -W -V Features 2 High-Pressure Fuel Pumps (1UR-FSE only) Delivery Pipe with Pulsation Damper Function Dual VVT-i VVT-iE for Intake MRE Type VVT Sensor D-4S (1UR-FSE only) 4 Flat Type Knock Sensors Double Slit-nozzle Injector (1UR-FSE only) [Features] - Dual VVT-i (for intake and exhaust) - VVT-iE (Motor Drive) for intake - Delivery pipe with pulsation damper function - 4 flat type knock sensors - MRE type VVT sensor - Engine coolant distribution pathway - Separator case for PCV - Water jacket spacer - 2 High-Pressure Fuel Pumps (1UR-FSE only) - D-4S (1UR-FSE only) - Double Slit-nozzle Injector (1UR-FSE only) Separator Case for PCV Engine Coolant Distribution Pathway Water Jacket Spacer

Engine Overall Features -A -W -V DC Motor for ACIS Valve
LS460L - Engine Engine Overall -A -W -V Features DC Motor for ACIS Valve Hydraulic Lash Adjuster Long-reach Type Spark Plug 4 Timing Chains Spiny Liner Magnesium Made Head Cover Crank Pulley with Balance Piece [Features] - Crank pulley with balance piece - 4 timing chains - ACIS valve driven by DC motor - Magnesium made head cover - Element replacing type oil filter - Long reach type spark plug - Spiny liner - Hydraulic lash adjuster Element Replacement Type Oil Filter

PWM Cooling Fan Control
LS460L - Engine Engine Overall -A -W -V Features 2 Air Cleaners 2 Air Flow Meters [Features] - 2 air cleaners - 2 air flow meters - PWM cooling fan control PWM Cooling Fan Control

Chain Drive, Dual VVT-i (VVT-iE)
LS460L - Engine Engine Overall -A -W -V Specifications Model LS460L / LS460  GS450h LS430 Engine 1UR-FSE 1UR-FE 2GR-FSE 3UZ-FE No. of Cylinders and Arrangement 8-Cylinder, V-type 6-Cylinder, Valve Mechanism 32-Valve DOHC, Chain Drive, Dual VVT-i (VVT-iE) 24-Valve DOHC, Chain Drive, Dual VVT-i Belt & Gear Drive, VVT-i Combustion Chamber Pentroof Type Displacement cm3 (cu. in.) 4,608 (281.2) 3,456 (210.9) 4,293 (261.9) Bore x stroke mm (in.) 94.0 x 83.0 (3.70 x 3.27) 91.0 x 82.5 (3.58 x 3.25) Compression Ratio 11.8 10.8 10.5 Max. Output rpm rpm) -A 6,400 6,400) - 6,400 6,400) 5,600 5,600) Other 6,400 6,400 5,600 Max. Torque rpm rpm) 4,100 ( 4,100) 4,800 4,800) 3,400 3,400) 4,100 4,000 4,800 3500

Engine Overall Specifications -A -W -V Model LS460L / LS460  GS450h
LS460L - Engine Engine Overall -A -W -V Specifications Model LS460L / LS460  GS450h LS430 Engine 1UR-FSE 1UR-FE 2GR-FSE 3UZ-FE Valve Timing Cylinder For #4,5,7,8 For #1,2,3,6 For All cylinder Intake Open (BTDC) -14 – 26 -10 – 30 -27 – 33 -14 – 31 Close (ABDC) 82 – 42 78 – 38 95 – 35 64 – 19 Exhaust (BBDC) 60 – 25 64 – 29 60 – 28 64 – 32 46 (ATDC) 4 – 39 0 – 35 4 – 36 0 – 32 3

Engine Overall Major Difference from 3UZ-FE on previous model (1/2) -A
LS460L - Engine Engine Overall -A -W -V Major Difference from 3UZ-FE on previous model (1/2) Model LS460L / LS460  LS430 Engine 1UR-FSE 1UR-FE 3UZ-FE Cylinder Head Cover Magnesium made Aluminum made Cylinder Liner Spiny liner Conventional Water Jacket Spacer With Without Crankshaft Pulley With balance piece Without balance piece Valve Mechanism 4 timing chains Timing belt & gear VVT-i Dual VVT-i (VVT-iE for intake) Single (Intake) VVT-i Valve Clearance Hydraulic lash adjuster Shim-less type valve lifter Oil Filter Element replacement type Cartridge type Air Cleaner 2 air cleaners 1 air cleaner ACIS Operated by DC motor Operated by vacuum actuator Fuel System D-4S (port and direct injection) Port injection Injector [Port] 12-hole injector 4-hole injector with air-assist

Engine Overall Major Difference from 3UZ-FE on previous model (2/2) -A
LS460L - Engine Engine Overall -A -W -V Major Difference from 3UZ-FE on previous model (2/2) Model LS460L / LS460  LS430 Engine 1UR-FSE 1UR-FE 3UZ-FE Delivery Pipe [Port] With pulsation damper mechanism Conventional pulsation damper is attached Spark Plug Long- reach Conventional Triple ground electrode single ground electrode Accelerator Pedal Position Sensor Non-contact type Contact type Air Flow Meter 2 air flow meters 1 air flow meter Crankshaft Position Sensor MRE type Pickup Coil Type Camshaft Position Sensor (VVT Sensor) Knock Sensor 4 knock sensors 2 knock sensors Oxygen Sensor 2 sensors [cup type] 4 sensors [cup type x2, planer type x2] Air-fuel Ratio Sensor [planer type] Without Cranking Hold Function With

Engine Overall Major Difference of 1UR-FSE from 2GR-FSE on GS450h -A
LS460L - Engine Engine Overall -A -W Major Difference of 1UR-FSE from 2GR-FSE on GS450h Model LS460L / LS460 GS450h Engine 1UR-FSE 2GR-FSE Cylinder Head Cover Magnesium made Aluminum made Water Jacket Spacer With Without Crankshaft Pulley With balance piece Without balance piece Valve Mechanism 4 timing chains 3 timing chains VVT-i Dual VVT-i (VVT-iE for intake) (hydraulic VVT-i) Air Cleaner 2 air cleaners 1 air cleaner ACIS Operated by DC motor Operated by rotary solenoid High-pressure Fuel Pump 2 pumps 1 pump EDU 2 EDUs 1 EDU Delivery Pipe [Direct] With mechanical relief valve With mechanical & electric relief valve Delivery Pipe [Port] With pulsation damper mechanism Conventional pulsation damper is attached Air Flow Meter 2 air flow meters 1 air flow meter Knock Sensor 4 knock sensors 2 knock sensors EVAP system (-A only) Key-off monitor (closed tank system)

Engine Overall Major Difference of 1UR-FE from 2GR-FE on RX350 -A -W
LS460L - Engine Engine Overall -A -W -V Major Difference of 1UR-FE from 2GR-FE on RX350 Model LS460L / LS460 RX350 Engine 1UR-FE 2GR-FE Cylinder Head Cover Magnesium made Aluminum made Water Jacket Spacer With Without Crankshaft Pulley With balance piece Without balance piece Valve Mechanism 4 timing chains 3 timing chains VVT-i Dual VVT-i (VVT-iE for intake) (hydraulic VVT-i) Air Cleaner 2 air cleaners 1 air cleaner ACIS Operated by DC motor Operated by rotary solenoid Delivery Pipe With pulsation damper mechanism Conventional pulsation damper is attached Alternator Pulley Without one-way clutch With one-way clutch Air Flow Meter 2 air flow meters 1 air flow meter Crankshaft Position Sensor MRE type Pickup Coil Type Knock Sensor 4 sensors 2 sensors Oxygen Sensor [cup type x2, planer type x2] [cup type] Air-fuel Ratio Sensor [planer type] Cranking Hold Function Engine ECU Locates in engine compartment (waterproof connector) Locates in cabin (non waterproof connector)

Engine Proper Cylinder Head Cover New SST for head cover removal -A -W
LS460L - Engine Engine Proper -A -W -V Cylinder Head Cover New SST for head cover removal New SST ( C110 ) Narrow New SST is provided for head cover removal. Note: Because the space for head cover removal is narrow, it is impossible to remove the head cover with a tool. New SST: C110 (Universal Socket Wrench)

Engine Proper Crankshaft Pulley
LS460L - Engine Engine Proper -A -W -V Crankshaft Pulley Balance piece is used to eliminates the engine assembly unbalance Balance Piece Balance piece eliminates the engine assembly unbalance.

Service Point (Engine Proper)
LS460L - Engine Service Point (Engine Proper) -A -W -V Crankshaft Pulley When the pulley replacement, balance piece installation is not needed Pulley Replacement When the pulley replacement, balance piece installation is not needed. (install the new pulley without balance piece) Install the new pulley without balance piece

Valve Mechanism Timing Chain 4 timing chains are used -A -W -V
LS460L - Engine Valve Mechanism -A -W -V Timing Chain 4 timing chains are used Chain Tensioners (for Primary) Secondary Chain (LH) Secondary Chain (RH) Chain Tensioner (for Secondary) Chain Tensioner (for Secondary) 4 timing chains are used. 4 chain tensioners are used for each chain. Primary Chain (RH) Primary Chain (LH)

VVT-iE (Motor-drive) for Intake VVT-i (Hydraulic) for Exhaust
LS460L - Engine Valve Mechanism -A -W -V Dual VVT-i VVT-iE (Motor-drive) is newly adopted for intake valve VVT-iE (Motor-drive) for Intake VVT-i (Hydraulic) for Exhaust VVT-iE (Variable Valve Timing-intelligent by Electric motor) is newly adopted for intake valve. Hydraulic VVT-i (4-vane) is used for exhaust valve.

Valve Mechanism Camshaft
LS460L - Engine Valve Mechanism -A -W -V Camshaft Composite intake and exhaust camshaft is used for weight reduction Cam Shaft A composite camshaft integrating net-shape forged cam pieces and a hollow shaft is used for weight reduction.

Cam for High-pressure Fuel Pump
LS460L - Engine Valve Mechanism -A -W Camshaft (1UR-FSE only) RH and LH intake camshafts drive the high-pressure pumps 2GR-FSE 1UR-FSE Cam for High-pressure Fuel Pump RH and LH intake camshafts drive the high-pressure pumps. The cam shape is changed from 2GR-FSE engine.

Engine Coolant Distribution Pathway
LS460L - Engine Cooling System -A -W -V Engine Coolant Distribution Pathway Cylinder head and cylinder block is cooled by coolant from the engine coolant distribution pathway Engine Coolant Distribution Pathway Engine coolant distribution pathway distributes the coolant to the cylinder head and the cylinder block. Coolant to the cylinder block is distributed equally to each cylinder.

Intake and Exhaust System
LS460L - Engine Intake and Exhaust System -A -W -V Air Inlet two-forked air inlet is used 2 air cleaners and 2 air flow meters are used Air Cleaners Air Flow Meters Air inlet is two-forked to respond to the cylinder volume (intake air volume) increase. 2 air cleaners are used to increase cleaning area. 2 air flow meters are installed at each air cleaner outlet.

LS460L - Engine Intake and Exhaust System -A -W -V Intake Manifold ACIS valve is actuated by DC motor DC Motor ACIS Valve DC motor is used for ACIS system.

LS460L - Engine Intake and Exhaust System -A -W -V ACIS Operation Open Open Close Open Throttle Valve Throttle Valve Close Open Close Close Low High Low High Engine Speed Engine Speed 1UR-FSE 1UR-FE

D-4S System (only for 1UR-FSE model)
LS460L - Engine D-4S System (only for 1UR-FSE model) -A -W General 1UR-FSE engine uses D-4S System D-4S System Direct Injection Port Injection + Basically same as 2GR-FSE on GS450h 1UR-FSE engine uses D-4S System. D-4S System = [Direct Injection] + [Port Injection] D-4S: Direct injection 4-stroke gasoline engine Superior Basic construction and operation of d-4S system is same as 2GR-FSE on GS450h.

LS460L - Engine D-4S System (only for 1UR-FSE model) -A -W System Diagram Injector (Port) Delivery Pipe (Port) Injector (Direct) [Double Slit-nozzle] : 4 – 13 MPa : 400 kPa Engine ECU (ECM) Delivery Pipe (Direct) Fuel Pressure Sensor EDU (No.1 & No.2) SCV Pulsation Damper Relief Valve (Mechanical) [Major Difference from 2GR-FSE on GS450h] - 2 high pressure-fuel pump is used. - 2 EDUs are used. - Electronic relief valve is not used. - Pulsation damper function is integrated to the delivery pipe (port). High-Pressure Fuel Pump Fuel Pump Jet Pump Pressure Regulator Fuel Tank

D-4 System (3GR-FSE - Ref - Ref)
LS460L - Engine D-4 System (3GR-FSE - Ref - Ref) -A -W Injector Slit-nozzle makes sector formed injection (1UR-FSE using 2 slits-nozzle) 0.71 mm (0.028 in.) Sector Formed Injection 0.15 mm (0.006 in.) A A Cross Section Sector formed injection increases air mixture, improving atomization and providing a highly uniform mixture Slit-nozzle

D-4 System (3GR-FSE - Ref)
-A -W Injector Construction form Delivery Pipe Back-up Ring O-ring Coil Injector Seal Nozzle-needle

Service Point (D-4 System)
LS460L - Engine -A -W Injector When remove the injector from cylinder head, replace the injector seal using new SST Injector Seal Injector Seal Guide ( ) Injector Seal Holder ( ) Replace the injector seal when remove the injector from cylinder head SST

LS460L - Engine Service Point (D-4 System) -A -W Injector Replacement of injector seals (using SST) Needle-nosed Pliers Taper Shape [Replacement of injector seals] 1. Remove injector seals using needle-nosed pliers and clean the injector groove Note: don’t damage the nozzle and injector grooves don’t clean the tip of the injector 2. Apply the engine oil to the inter face of guide (SST: ) and attach the guide to the injector Note: taper shape portion direction is injector tip side 1. Remove injector seals 2. Attach the guide (SST)

LS460L - Engine -A -W Injector Replacement of injector seals (using SST) 3. Install a new injector seal to the holder (SST: ) (injector seal is extended) 4. Install the holder (with injector seal) to the injector and slide the injector seal downward into the injector groove (connector side) 3. Install a new injector 4. Slide the the injector seal into the injector groove

LS460L - Engine -A -W Injector Replacement of injector seals (using SST) Gently press 5. Gently press the holder downward on the injector seal, then slowly slide the guide towards the injector tip to settle the injector seal into the injector groove 6. Install a new injector seal to the holder (injector seal is extended) 5. Settle the injector seal 6. Install a new injector seal

LS460L - Engine -A -W Injector Replacement of injector seals (using SST) 7. Install the holder (with injector seal) to the injector and slide the injector seal downward into the injector groove (injector tip side) 8. Slowly slide the guide toward the injector tip until the guide bottom aligns with the injector seal (connector side) bottom. Hold 5 sec. or more to fully align the injector seal (connector side) 7. Slide the injector seal into the injector groove 8. Fully align the injector seal

LS460L - Engine -A -W Injector Replacement of injector seals (using SST) Gently press 9. Gently press the holder downward on the injector seal (injector tip side), then slowly slide the guide towards the injector tip to settle the injector seal (injector tip side) into the injector groove 10. Slowly slide the guide toward the injector tip until the guide bottom aligns with the injector seal (injector tip side) bottom. Hold 5 sec. or more to fully align the injector seal (injector tip side) 9. Settle the injector seal 10. Fully align the injector seal

LS460L - Engine -A -W Injector Replacement of injector seals (using SST) Replace 11. Remove guide and check that the injector seals are not scratched, deformed or protruding from the injector groove Note: If scratched, deformed or protruding from the injector groove, replace it 11. Check the injector seals

LS460L - Engine D-4S System (only for 1UR-FSE model) -A -W High-Pressure Fuel Pump 2 high-pressure fuel pumps are installed on cylinder head cover High-pressure Fuel Pump 2 high-pressure fuel pumps are installed on cylinder head cover. They are driven by intake camshaft. Construction and operation is same as 2GR-FSE on GS450h.

LS460L - Engine D-4S System (only for 1UR-FSE model) -A -W EDU (Electronic Driver Unit) 2 EDUs are used for 8 injectors (direct) EDU (for #2,3,5,8) 2 EDU are used. EDU (for #1,4,6,7)

LS460L - Engine D-4S System (only for 1UR-FSE model) -A -W Delivery Pipe (Port) Pulsation damper function is integrated in the delivery pipe Pulsation damper function Inner Pipe Pulsation damper function is integrated in the delivery pipe (port). Conventional pulsation damper is discontinued. The inner tube is deformed by fuel pressure and absorbs the fuel pulsation. Fuel Delivery Pipe for Port Injector

Oil Separator Mechanism
LS460L - Engine PCV -A -W -V Separator Case Oil separator mechanism is included to the separator case and cylinder head cover becomes compact : Blowby Gas : Fresh Air Oil Separator Mechanism Oil Mist Blowby Gas PCV Valve Cylinder head cover becomes compact by integrating the oil separator mechanism in the separator case. Separator Case Separator Case

[Installation Direction]
LS460L - Engine Engine Control System -A -W -V Knock Sensor 4 knock sensors are installed at inside of V-bank [Installation Direction] Front 4 knock sensors are used to ensure the reliability of knock detection performance.

Engine Control System VVT-iE VVT-iE (Motor Drive) for intake valve
LS460L - Engine Engine Control System -A -W -V VVT-iE VVT-iE (Motor Drive) for intake valve Hydraulic (conventional) VVT-i for exhaust valve Intake Exhaust Motor-drive [Intake] VVT-iE (Variable Valve Timing-intelligent by Electric motor) is newly adopted. Operation range: 40ºCA [Exhaust] Hydraulic VVT-i (4-vane) is used. Operation range: 35ºCA [1UR-FSE] / 32ºCA [1UR-FE] Hydraulic

Engine Control System VVT-iE Parts location of VVT system -A -W -V
LS460L - Engine Engine Control System -A -W -V VVT-iE Parts location of VVT system VVT Sensor (IN, RH) VVT Sensor (EX, RH) Camshaft Position Sensor VVT Sensor (IN, LH) VVT Sensor (EX, LH) Camshaft Control Motor Reduction mechanism Link Mechanism VVT-iE Controller For Intake OCV For Exhaust Crankshaft position sensor, camshaft position sensor and VVT sensor are MRE type. Crankshaft Position Sensor VVT-i Controller For Exhaust

VVT System Operation Range
LS460L - Engine Engine Control System -A -W -V VVT-iE Operation range is expanded by changing from hydraulic type to motor-drive type VVT System Operation Range High Hydraulic VVT-i THW VVT-iE Operation range is expanded by changing from hydraulic type to motor-drive type. Conventional hydraulic VVT-i is not operated at low temperature or low engine speed (engine starting included) due to low oil pressure or low lubrication. Low Low High Engine Speed

Engine Control System VVT-iE System Diagram
LS460L - Engine Engine Control System -A -W -V VVT-iE System Diagram Camshaft Control Motor Assembly Rotation Angle Sensor EDU Engine ECU (ECM) Motor VVT Sensor Camshaft Position Sensor Crankshaft Position Sensor

Cycloid Reduction Mechanism
LS460L - Engine Engine Control System -A -W -V VVT-iE Construction of Camshaft Control Motor and VVT-iE controller Cycloid Reduction Mechanism Link Mechanism EDU Intake Camshaft Chain Sprocket (Primary) Motor

Engine Control System VVT-iE
LS460L - Engine Engine Control System -A -W -V VVT-iE EDU controls the motor, and feeds back the state of the motor to engine ECU (ECM) Camshaft Control Motor Motor Speed and Rotation Direction Command Signal EDU Engine ECU (ECM) EDT1 VTP Rotation Angle Sensor EMR1 Actual Motor Speed VTS Actual Motor Rotation Direction Motor (12V) EMF1 VTD EMD1 Fail Information VTM

Engine Control System VVT-iE Fail information from EDU
LS460L - Engine Engine Control System -A -W -V VVT-iE Fail information from EDU EDU Motor (12V) Rotation Angle Sensor Engine ECU (ECM) VTP VTS VTD Motor Speed and Rotation Direction Command Signal Actual Motor Speed Actual Motor Rotation Direction EDT1 EMR1 EMF1 Camshaft Control Motor Condition Duty Ratio Open circuit between VTP and EDT1 100 % Normal 80 % EDU Overheat, Motor voltage malfunction 60 % Rotation angle sensor malfunction 40 % Protection mode for the motor over current 20 % 5V EMD1 VTM Fail Information

LS460L - Engine Engine Control System -A -W -V VVT-iE Construction of Camshaft Control Motor and VVT-iE controller Camshaft Link Mechanism Spiral Plate Camshaft Control Motor Timing Sprocket Cycloid Reduction Mechanism

Planetary Gear [Output]
LS460L - Engine Engine Control System -A -W -V VVT-iE Construction of cycloid reduction mechanism Bearing Planetary Gear [Output] Carrier [Input] Sun Gear (Housing Cover)

Engine Control System VVT-iE Operation of cycloid reduction mechanism
LS460L - Engine Engine Control System -A -W -V VVT-iE Operation of cycloid reduction mechanism Planetary gear turns 1/26 Motor shaft turns 1 Planetary Gear [27] Sun Gear [26] (Housing Cover) A sun gear (26 teeth) that is secured to the housing cover. A planetary gear (27 teeth) that is output of reduction mechanism. Along with the rotational movement of the motor shaft, the planetary gear pushes against the sun gear, while meshing. The planetary gear, which has 1 tooth more than the sun gear, rotates 1 tooth more per rotation of the motor shaft. As a result, the planetary gear rotates. Outputs the rotational movement of the motor at a reduction ratio of 26. Reduction Ratio: 26 [ ]: Number of teeth

Engine Control System VVT-iE Operation (Outline)
LS460L - Engine Engine Control System -A -W -V VVT-iE Operation (Outline) The difference between the camshaft speed and motor speed is VVT operation VVT Mode Hold Advance Hold Retard Hold Advance Valve Timing Retard Motor Speed The difference between the camshaft speed and motor speed is VVT operation. Advance: Motor Speed > Camshaft Speed Retard: Motor Speed < Camshaft Speed Hold: Motor Speed = Camshaft Speed Fast Rotational Speed Camshaft Speed Slow

LS460L - Engine Engine Control System -A -W -V VVT-iE Advance operation (Motor Speed > Camshaft Speed) Advance Connected to timing sprocket Link Control Pin Connected to camshaft [Advance Operation (Motor Speed > Camshaft Speed) Note: Rotational torque transmission: Timing Sprocket >>> Link A (Green) >>> Link B (Red) >>> Camshaft Plate (Blue) >>> Camshaft During advance operation, a camshaft control motor is operated at a faster speed than a camshaft. Spiral plate is rotated by the motor via the reduction mechanism. The link control pin slide to inside along the groove of the spiral plate. With the result that link mechanism rotates the camshaft plate to advance direction. Spiral plate rotates by motor

LS460L - Engine Engine Control System -A -W -V VVT-iE Retard operation (Motor Speed < Camshaft Speed) Retard Connected to timing sprocket Link Control Pin Connected to camshaft [Retard Operation (Motor Speed < Camshaft Speed) Note: Rotational torque transmission: Timing Sprocket >>> Link A (Green) >>> Link B (Red) >>> Camshaft Plate (Blue) >>> Camshaft During retard operation, a camshaft control motor is operated at a slower speed than a camshaft. Spiral plate is rotated by the motor via the reduction mechanism. The link control pin slide to outside along the groove of the spiral plate. With the result that link mechanism rotates the camshaft plate to retard direction. Spiral plate rotates by motor

LS460L - Engine Engine Control System -A -W -V VVT-iE Hold operation (Motor Speed = Camshaft Speed) Connected to timing sprocket Connected to camshaft [Hold Operation (Motor Speed = Camshaft Speed)] Motor speed is the same as camshaft speed. Spiral plate does not rotate and link control pin is not moved. Valve timing is not changed. Spiral plate does not rotate

Engine Control System VVT-iE Operation Click the green sphere -A -W -V

[In Low Speed Range with Light to Medium Load]
LS460L - Engine Engine Control System -A -W -V VVT-iE System operation [During Idling] [In Low Speed Range with Light to Medium Load] Increase internal EGR, Eliminate pumping loss Reduce blow back to the intake side TDC TDC Earliest Retard [During Idling] Eliminate overlap to reduce blow back to the intake side. Effect: Stabilized idling rpm Better fuel economy [In Low Speed Range with Light to Medium Load] Increase the overlap, and retard the intake valve close timing to increases internal EGR and reducing pumping losses. Effect: Better fuel economy Improved emission control Middle Retard BDC BDC - Effect - Stabilized idling rpm Better fuel economy - Effect - Better fuel economy Improved emission control

Engine Control System VVT-iE System operation
LS460L - Engine Engine Control System -A -W -V VVT-iE System operation [In Low to Medium Speed Range with Heavy Load] [In High Speed Range with Heavy Load] TDC TDC Retard Advance Volumetric efficiency improvement [In Low to Medium Speed Range with Heavy Load] Advancing the intake valve closing timing for volumetric efficiency improvement. Effect: Improved torque in low to medium speed range. [In High Speed Range with Heavy Load] Retarding the intake valve closing timing for volumetric efficiency improvement. Effect: improved output. Retard Advance Volumetric efficiency improvement BDC BDC - Effect - Improved torque in low to medium speed range - Effect - Improved output

[Upon Starting / Stopping the Engine]
LS460L - Engine Engine Control System -A -W -V VVT-iE System operation [At Low Temperatures] [Upon Starting / Stopping the Engine] Reduce blow back to the intake side, stabilizes the idling speed at fast idle Reduce blow back to the intake side TDC TDC Earliest Earliest [At Low Temperatures] Eliminate overlap to reduce blow back to the intake side leads to the lean burning condition, and stabilizes the idling speed at fast idle. Effect: Stabilized fast idling rpm Better fuel economy [Upon Starting / Stopping the Engine] Eliminate overlap to reduce blow back to the intake side Effect: Improved startability Middle Middle BDC BDC - Effect - Stabilized fast idling rpm Better fuel economy - Effect - Improved startability

Engine Control System VVT-iE DTC for VVT-iE (1/2) -A -W -V DTC
LS460L - Engine Engine Control System -A -W -V VVT-iE DTC for VVT-iE (1/2) DTC Detection Item Trouble Area P0010 Camshaft Position "A" Actuator Circuit (Bank 1) Camshaft timing control motor (bank 1) Camshaft timing gear assembly (bank 1) P0011 Camshaft Position "A" – Timing Over-Advanced or System Performance (Bank 1) P0012 Camshaft Position "A" – Timing Over-Retarded (Bank 1) P0016 Crankshaft Position – Camshaft Position Correlation (Bank 1 Sensor A) Valve timing P0018 Crankshaft Position – Camshaft Position Correlation (Bank 2 Sensor A) Camshaft timing gear assembly (bank 2) Camshaft timing control motor (bank 2) P0020 Camshaft Position "A" Actuator Circuit (Bank 2) P0021 Camshaft Position "A" – Timing Over-Advanced or System Performance (Bank 2) P0022 Camshaft Position "A" – Timing Over-Retarded (Bank 2) P1023 Camshaft Position Signal Output "B" Circuit

Engine Control System VVT-iE DTC for VVT-iE (2/2) DTC Detection Item
LS460L - Engine Engine Control System VVT-iE DTC for VVT-iE (2/2) DTC Detection Item Trouble Area P1360 "A" Camshaft Position Actuator Circuit Open, Low, High Bank1 Camshaft timing control motor (bank 1) Wire harness and connector P1361 "A" Camshaft Position Actuator Circuit Open, Low, High Bank2 Camshaft timing control motor (bank 2) P1362 "B" Camshaft Position Actuator Circuit Open, Low, High Bank1 P1363 "B" Camshaft Position Actuator Circuit Open, Low, High Bank2 P1364 "C" Camshaft Position Actuator Circuit Open, Low, High Bank1 Power supply of Camshaft timing control motor (bank 1) P1365 "C" Camshaft Position Actuator Circuit Open, Low, High Bank2 Power supply of camshaft timing control motor (bank 2) P1366 "E" Camshaft Position Actuator Circuit Open, Low, High Bank1 P1367 "E" Camshaft Position Actuator Circuit Open, Low, High Bank2 P2614 Camshaft Position Signal Output Circuit / Open

Fail Safe Deactivation Condition
LS460L - Engine Engine Control System -A -W -V VVT-iE Fail-safe DTC Component Fail-Safe Operation Fail Safe Deactivation Condition P0010, P0020, P1023, P1360, P1361, P1362, P1363, P1364, P1365, P1366, P1367, P2614 Camshaft timing control motor Idling up (fire prevention), or power to camshaft timing control motor is cut Valve timing of bank that is operating normally is fixed at maximum retard angle Pass condition detected Active Test Tester Display Test Part Control Range MD VVT B1 VVT-iE (bank1) 0 to 45º MD VVT B2 VVT-iE (bank2)

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