FORTUNER - Chassis Click a Section Tab Contents Click a Section Tab Instructors

A34#E/F Automatic Transmission VF4B Transfer Differential Suspension Brake Steering

A34#E/F Series Automatic Transmission FORTUNER - Chassis A34#E/F Series Automatic Transmission Overall Compact, lightweight, and high-capacity 4-speed A34#E/F series automatic transmission (ECT) [Specifications] Transmission Type A343E/F Engine Type 2TR-FE Gear Ratios 1st 2.804 2nd 1.531 3rd 1.000 4th 0.753 Reverse 2.393 Fluid Capacity [Litter (US qts, lmp. qts)] 10.1 (10.7, 8.9) Fluid Type ATF Type T-IV The basic construction and operation are the same as the HILUX (RZN149, 154 / KDN166) Electrical key interlock device is used Instructors

A34#E/F Series Automatic Transmission FORTUNER - Chassis A34#E/F Series Automatic Transmission System Diagram System diagram for Gasoline Engine [Gasoline Engine Model] Engine ECU Transmission CPU Engine CPU Various Sensor for Engine Control System Various Sensor for Transmission Control System Injectors Solenoid Valves Combination Meter • • • DLC3 On the diesel engine models, engine ECU and transmission ECU are applied separately, which ECUs exchange information CAN communication Instructors

A34#E/F Series Automatic Transmission FORTUNER - Chassis A34#E/F Series Automatic Transmission Planetary Gear Unit Gear train consists of the following clutches, brakes, one-way clutches and planetary gear sets B0 B2 B3 F2 C0 F0 F1 C1 Input Output C2 B1 O/D Planetary Gear Front Planetary Gear Rear Planetary Gear : Clutch : Brake : One-way Clutch Instructors

A34#E/F Series Automatic Transmission Planetary Gear Unit Function of components Component Function C0 OD Direct Clutch Connects OD planetary sun gear and OD planetary carrier C1 Forward Clutch Connects input shaft and front planetary ring gear C2 Direct Clutch Connects input shaft and front and rear planetary sun gear B0 OD Brake Prevents OD planetary sun gear from turning either clockwise or counterclockwise B1 2nd Coast Brake Prevents front and rear sun gear from turning either clockwise of counterclockwise B2 2nd Brake Prevents outer race of F1 from turning either clockwise or counterclockwise, thus preventing front and rear sun gear from turning counter clockwise B3 1st and Reverse Brake Prevents rear planetary carrier from turning either clockwise or counterclockwise F0 OD One-way Clutch When engine power is transmitted to OD input shaft, connects OD planetary sun gear and planetary carrier F1 No. 1 One-way Clutch When B2 is operating, prevents front and rear planetary sun gear from turning counterclockwise F2 No. 2 One-way Clutch Prevents rear planetary carrier from turning counterclockwise

A34#E/F Series Automatic Transmission Planetary Gear Unit Operating condition : Signal ON, X: Signal OFF, : Operation Shift Lever Position Gear Shift Solenoid Valve Clutch Brake One-way Clutch No. 1 No. 2 C0 C1 C2 B0 B1 B2 B3 F0 F1 F2 P Park   R Reverse N Neutral D 1st 2nd 3rd 4th 2 L *1: After engaging, lock-up control is ON *2: After engaging, line pressure control is ON *3: After engaging, line pressure control is OFF

A34#E/F Series Automatic Transmission Valve Body Valve body consist following parts Upper Valve Body No. 2 Solenoid Valve Lower Valve Body No. 1 Solenoid Valve Solenoid Valve SLT Solenoid Valve SL

A34#E/F Series Automatic Transmission Electronic Control System Line pressure optimal control Engine torque control Shift timing control Lock-up timing control “N” to “D” squat control

4WD (2TR-FE) Overall Full-time 4WD with a TORSEN LSD for center differential Manual operation type Center Diff Locked

4WD (2TR-FE) 4WD Operation LL N HL H Low (ratio:2.566) Lock, Center Diff. Locked N Neutral, no engagement HL High (ratio:1.000) Lock, Center Diff. Locked H High (ratio:1.000), Center Diff. Free For normal (urban) operation, always use “H” mode for better fuel economy and preventing “tight corner braking phenomenon”

4WD (2TR-FE) 4WD Operation

4WD (2TR-FE) 4WD Operation

4WD (2TR-FE) Service Points, Towing

4WD (2TR-FE) Service Points, Precautions

4WD (2TR-FE) Service Points, Speed Test

4WD (2TR-FE) Service Points, Wheel Balance

Single Pinion Planetary FORTUNER - Chassis VF4B Transfer Overall Full-time 2-speed type VF4B transfer with a TORSEN LSD for center differential Manual operation type TORSEN LSD [Specifications] Transfer Type VF4B Drive Type Full-time Gear Ratios H4 1.000 L4 2.566 Reduction Gear Type Single Pinion Planetary Center Differential TORSEN LSD Oil Capacity [Litter (US qts, lmp. qts)] 1.4 (1.5, 1.3) Oil Viscosity SAE 75W-90 Oil Grade API GL-5 VF4B transfer is used for FORTUNER / HILUX SW4 Instructors

VF4B Transfer System Diagram Skid Control ECU Engine ECU A/T P Center Diff. Lock Indicator Light Engine ECU A/T P A/T P Warning Light (Only for ATM model) Neutral Start Switch (Only for ATM model) Neutral Start Switch (Only for ATM model) L4 Position Switch Center Diff. Lock Position Switch

VF4B Transfer Center Differential TORSEN LSD Components FORTUNER - Chassis VF4B Transfer Center Differential TORSEN LSD Components Ring Gear Coupling Pinion Gear Differential Case Sun Gear Coupling Planetary Carrier Clutch Plate No.4 Sun Gear Clutch Plate No.2 Clutch Plate No.1 Ring Gear Clutch Plate No.3 NOTE: Non-disassemble Part Instructors

VF4B Transfer Center Differential TORSEN LSD Components Clutch Plate No.1 Ring Gear Clutch Plate No.2 Sun Gear Coupling Ring Gear Coupling Differential Case Carrier Nut Planetary Carrier Thrust Plate Clutch Plate No.4 Sun Gear Clutch Plate No.3 Pinion Gear

VF4B Transfer Center Differential TORSEN LSD Normal driving FORTUNER - Chassis VF4B Transfer Center Differential TORSEN LSD Normal driving Fr: 40 Rr :60 % torque distribution ratio Front Output INPUT Sun Gear Coupling Differential Case Planetary Carrier Pinion Gear Rear Output Ring Gear Coupling Instructors

VF4B Transfer Center Differential TORSEN LSD Normal driving Front Output INPUT Sun Gear Coupling Differential Case Planetary Carrier Pinion Gear Rear Output Ring Gear Coupling

VF4B Transfer Center Differential TORSEN LSD Normal driving Front Output INPUT Sun Gear Coupling Differential Case Planetary Carrier Pinion Gear Rear Output Ring Gear Coupling

VF4B Transfer Center Differential TORSEN LSD Normal driving Front Output INPUT Sun Gear Coupling Differential Case Planetary Carrier Pinion Gear Rear Output Ring Gear Coupling

VF4B Transfer Center Differential TORSEN LSD Normal driving Fr Output Rr Output Front Output INPUT Sun Gear Coupling Differential Case Planetary Carrier Pinion Gear Rear Output Ring Gear Coupling

Confidential VF4B Transfer Center Differential FORTUNER - Chassis VF4B Transfer Confidential Center Differential TORSEN LSD (Torque Sensing) TORSEN LSD automatically adjust the torque distribution ratio for the three modes according to the wheel speed condition to ensure the driving stability Wheel Speed Condition Under Acceleration Torque Distribution Ratio Front Rear Front Wheel = Rear Wheel 40 60 Front Wheel > Rear Wheel 29 71 Front Wheel < Rear Wheel 53 47 Confidential !! For Distributor use only !!! 3-type torque distribution ratio Number and total surface of clutch make 3 types of ratio Instructors

VF4B Transfer Center Differential TORSEN LSD FORTUNER - Chassis VF4B Transfer Center Differential TORSEN LSD Front wheel speed = Rear wheel speed [Torque Distribution] Front : Rear= 2 : 3 Front: 2/5 x 100=40 Rear: 3/5 x 100=60 Front : Rear= 40 : 60 Front Rear This construction makes 40:60 ratio Instructors

VF4B Transfer Center Differential TORSEN LSD FORTUNER - Chassis VF4B Transfer Center Differential TORSEN LSD Front wheel speed > Rear wheel speed Fr Output Rr Output Speed difference between front and rear wheel At front faster condition, pinion starts to rotate Front Output INPUT Sun Gear Coupling Differential Case Planetary Carrier Pinion Gear Rear Output Ring Gear Coupling Instructors

VF4B Transfer Center Differential TORSEN LSD FORTUNER - Chassis VF4B Transfer Center Differential TORSEN LSD Front wheel speed > Rear wheel speed Friction Fr Output Rr Output -Pinion rotates and applied friction with the carrier -This braking force and diagonal gear make sliding force /Ring gear : front side /Pinion :rear side /Sungear : rear side Front Output INPUT Sun Gear Coupling Differential Case Planetary Carrier Pinion Gear Rear Output Ring Gear Coupling Instructors

VF4B Transfer Center Differential TORSEN LSD FORTUNER - Chassis VF4B Transfer Center Differential TORSEN LSD Front wheel speed > Rear wheel speed Fr Output Rr Output -Each gear slide applies pressure force to each clutch -Clutch transfers the rotational speed from faster side to lower speed side as torque transfer Clutch Plate No. 4 Front Output INPUT Sun Gear Coupling Differential Case Planetary Carrier Pinion Gear Rear Output Ring Gear Coupling Click! Clutch Plate No.1 Instructors

VF4B Transfer Center Differential TORSEN LSD FORTUNER - Chassis VF4B Transfer Center Differential TORSEN LSD Front wheel speed < Rear wheel speed Fr Output Rr Output Speed difference between front and rear wheel At rear faster condition, pinion starts to rotate Front Output INPUT Sun Gear Coupling Differential Case Planetary Carrier Pinion Gear Rear Output Ring Gear Coupling Instructors

VF4B Transfer Center Differential TORSEN LSD FORTUNER - Chassis VF4B Transfer Center Differential TORSEN LSD Front wheel speed < Rear wheel speed Friction Fr Output Rr Output -Pinion rotates and applied friction with the carrier -This braking force and diagonal gear make sliding force /Ring gear : front side /Pinion :front side /Sungear : rear side Front Output INPUT Sun Gear Coupling Differential Case Planetary Carrier Pinion Gear Rear Output Ring Gear Coupling Instructors

VF4B Transfer Center Differential TORSEN LSD FORTUNER - Chassis VF4B Transfer Center Differential TORSEN LSD Front wheel speed < Rear wheel speed Fr Output Rr Output -Each gear slide applies pressure force to each clutch -Clutch transfers the rotational speed from faster side to lower speed side as torque transfer Clutch Plate No. 4 Front Output INPUT Sun Gear Coupling Differential Case Planetary Carrier Pinion Gear Rear Output Ring Gear Coupling Clutch Plate No.1 Click! Clutch Plate No.2 Instructors

[Rear Differential (B200)] FORTUNER - Chassis Differential Overall S20SNF for front differential, B200 type for rear differential [Front Differential (S20SNF)] [Rear Differential (B200)] Front Differential: S20SNF Rear Differential: B200, DANA204 / B200 with LSD for Prerunner, 1KD-FTV engine of G.C.C. countries Engine Front Dif. Rear Dif. Ratio 2TR-FE S20SNF B200 4.555 Instructors

Suspension Overall Front: Double wishbone type independent suspension FORTUNER - Chassis Suspension Overall Front: Double wishbone type independent suspension Rear: Coil spring type rigid axle suspension 4-link coil spring with lateral rod type suspension Stabilizer is used on front as standard equipment Instructors

Tandem (Lockheed + Lockheed) FORTUNER - Chassis Brake Brake Specifications Drive Type 2WD, 4WD Master Cylinder Type Tandem (Lockheed + Lockheed) Diameter [mm (in.)] 20.64 (0.81) Brake Booster Gasoline 10” Single Diesel 9” Single Front Brake Caliper Type (Opposed) S13W for 16-inch Disc Type Ventilated Wheel Cylinder Diameter [mm (in.)] 42.85(1.69) x 2 Rotor Size (D x T) [mm (in.)] 255 x 25 (10.04 x 0.98) Pad Material PS558H Rear Brake Drum Type 297LT Drum Inner Diameter [mm (in.)] 295 (11.61) Lining Material LN508-FF Brake Control Valve / Brake Control System LSP & BV / ABS Parking Brake Type Center Lever Supplier of Brake Actuator ADVICS [Skid control ECU with brake actuator] Supplier: ADVICS Available model of ABS system is the following models; STD: Thailand, Malaysia, Philippines, Vietnam, India, G.C.C. Countries (1GR-FE), South Africa (1GR-FE), Latin America (SR grade) and ANCOM Instructors

Load Sensing Proportioning Valve Brake Brake Type Front Disc Brake Load Sensing Proportioning Valve

Brake Fluid Level Warning Switch Brake Control System System diagram Brake Fluid Level Warning Switch Stop Light Switch Speed Sensors Brake Actuator Deceleration Sensor*1 Skid Control ECU Speed Sensors DLC3 Speed Meter ABS Warning Light Brake System Warning Light 4WD Detection Switch*1 Combination Meter *1: Only 4WD model

Brake Brake Control System Deceleration Sensor Deceleration Sensor (Under Driver Seat)

FORTUNER - Chassis Steering Overall Rack and pinion, engine speed sensing type power steering is used ATF Type DEXRON® II or III Engine Speed Sensing Type Power Steering Stepless Manual Tilt and Energy Absorbing Mechanism [HILUX] Manual Steering: on 2KD-FTV engine for Thailand Power Steering: Other models [FORTUNER / HILUX SW4] Power Steering: for all models as STD [KIJANG INNOVA / INNOVA] Manual Steering: for STD grade model for India as STD Power Steering: Other models as STD Stepless manual tilt mechanism and steering column energy absorbing mechanism are used on all models as STD Instructors