AIM OF DEVELOPMENT

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External View

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Vehicle Outline

Engine

•  Mechanical

―  A roller has been adopted to the rocker arm to reduce rolling resistance. Due to this, fuel economy has been improved. (WL-C, WE-C)

―  Valve lift has been increased (high lift), improving intake and exhaust efficiencies. Due to this, engine torque and power have been improved. (WL-C, WE-C)

―   A timing belt auto tensioner has been adopted to reduce timing belt deterioration. (WL-C, WE-C)

―  A DOHC type valve system has been adopted for improved engine torque and power. (WL-C, WE-C)

―  Due to the bifurcated oil pan bottom, vibration in the oil pan has been reduced for improved engine noise suppression. (WL-C, WE-C)

―  A hard-plastic oil strainer has been adopted for weight reduction.

―  A cover has been installed on the upper part of the engine for improved appearance and engine noise suppression. (WL-C, WE-C)

―  A hydraulic lash adjuster has been adopted for improved servicing. (F2, G6)

―  A balance shaft has been adopted for reduced vibration and noise. (G6, WLT-1, WLT-2, WL-C, WE-C)

•  Intake/exhaust and fuel supply systems

―  Superior high-output, noise suppression, and low fuel consumption have been realized due to the adoption of a direct injection type common rail. (WL-C, WE-C)

―  Smooth driveability has been realized due to the adoption of a variable induction turbocharger which achieves a balance between the air charging pressure providing responsive rise from low speed and the air charging pressure at the high speed range. (WL-C, WE-C)

―  A water-cooling type EGR cooler with excellent cooling capability has been adopted for improved intake air charging efficiency, recirculating more exhaust gas. Due to this, NOx has been reduced for improved exhaust emission performance.

Suspension and steering

•  Front suspension

―  The double wishbone suspension, which has I-shape lower arms and tension rods, is used for the front suspension of 4x2 models.

―  The double wishbone suspension, which has A-shape lower arms, is used for the front suspension of 4x2 (high clearance model) and 4x4 models. A-shape lower arms have high rigidly and durability.

―  The torsion bar springs are used for both 4x2 and 4x4 models.

4x2 (Except high clearance model)

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4x2 (High clearance model)

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4x4

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•  Rear suspension

―  The rigid axle suspension with leaf spring is used for the rear suspension.

―  To prevent wind-up of the leaf springs during rapid acceleration or deceleration, the shock absorber on the right side is mounted at the rear of the axle and the left one is mounted at the front of the axle, (bias mount).In order to increase the rigidity in the lateral direction, wide shackle plates are used in the frame mounting.

―  For 4x2 (high clearance model) and 4x4 models, the rear springs are mounted on top of the axle housing to raise the center of gravity. Thus, the shock absorbers attach directly to brackets welded to the axle housing.

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Power steering

•  With the adoption of an engine speed sensing power steering mechanism, handling stability has been improved.

•  With the adoption of a steering column with a tilt mechanism, operability has been improved. (some models)

•  With the adoption of a steering shaft with an energy absorbing mechanism, safety has been improved.

L.H.D.

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R.H.D.

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4x4 control

•  Remote Freewheel (RFW)

Manual transmission

―  The PCM (WL-C, WE-C) or the RFW CM (G6, WLT-1, WLT-2) receives signals from the transfer case switch and other switches. It then activates one of two solenoids, causing a vacuum from the vacuum pump or intake manifold to be applied to the RFW actuator, and switching the remote freewheel (RFW) unit to lock or free.

―  To prevent reduced performance of the actuator as a result of a decrease in engine vacuum or vacuum pump, such as during acceleration or at high altitude operation, the actuation system includes a one-way check valve.

―  The switching mechanism of the RFW unit is a mechanical dog clutch on the left side of the front differential.

―  The RFW operation is controlled by PCM or RFW CM.

Automatic transmission

―  A special 4x4 control module has been adopted for the 4x4 control system control, and it operates the transfer motor according to the signals from the speed sensor, 4x4 switch, and TR sensor to perform shifting between 2H, 4H and 4L.

―  The 4x4 CM receives signals from the transfer case sensor and other switches. It then activates one of two solenoids, causing a vacuum from the vacuum pump to be applied to the RFW actuator, and switching the remote freewheel (RFW) unit to lock or free.

―  To prevent reduced performance of the actuator as a result of a decrease in engine vacuum or vacuum pump, such as during acceleration or at high altitude operation, the actuation system includes a one-way check valve.

―  The switching mechanism of the RFW unit is a mechanical dog clutch on the left side of the front differential.

―  The RFW operation is controlled by 4x4 CM.

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Brakes

•  A tandem-type master cylinder has been adopted, improving braking force.

•  A large diameter, tandem diaphragm power brake unit has been adopted, improving braking force.

•  A large diameter, ventilated disc-type front brake has been adopted, improving braking force.

•  A two-piston type front disc brake caliper has been adopted, improving braking force. (4x2 (high clearance model), 4x4)

•  A wide width lining for the rear brake drum has been adopted, improving braking force.

•  An Automatic adjustment mechanism rear brake (drum) has been adopted, improving serviceability.

•  A vacuum pump has been adopted, improving braking force. (Except F2 and G6)

L.H.D.

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R.H.D.

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ABS

•  The ABS HU/CM, integrating both the hydraulic unit (HU) and control module (CM), has been adopted, resulting in size and weight reduction.

•  Select-low controlled-4-wheel anti-lock brake system with 4-sensor and 3-channel has been adopted, and has the following features.

―  The integrated ABS Hydraulic Unit/Control Module (HU/CM) system is compact, lightweight and highly reliable.

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Transmission

•  Manual transmission [M15M-D]

―  A stopper pin-type reverse lockout mechanism has been adopted.

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•  Manual transmission [R15M-D, R15MX-D]

―  A double cone synchronizer mechanism has been adopted for 2nd gear. (Except F2 and G6)

―  A stopper pin-type reverse lockout mechanism has been adopted.

R15M-D

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R15MX-D

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•  Manual transmission [S15M-D, S15MX-D]

―  A linked, triple-cone synchronizer mechanism has been adopted for 1st and 2nd gears.

―  A linked, double cone synchronizer mechanism has been adopted for 3rd gear.

―  A cam-type reverse lockout mechanism has been adopted.

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•  Automatic transmission [5R55S]

―  Five forward speeds automatic transmission has been adopted.

―  A water-cooling type and an air-cooling type AT oil cooler has been adopted.

―  An adaptive learn strategy system has been adopted.

―  An engine-transaxle total control system has been adopted.

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•  Transfer [5R55S]

―  A chain-type transfer drive has been adopted for 4x4 driving to improve noise suppression. In addition, the drive sprocket, which drives the chain, rotates only during 4x4 driving to improve noise suppression during 4x2 driving.

―  Shifting between 4x2 HIGH, 4x4 HIGH, and 4x4 LOW is performed by the motor for improved operability.

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Safety

•  An immobilizer system has been adopted. This anti-theft device prevents the engine from being started unless the encrypted identification code, transmitted from a special electronic chip embedded in the key, corresponds with the identification code registered in the vehicle.

•  Side air bags that effectively protect the chest area have been adopted for the seats.

•  Pre-tensioner and load limiter mechanisms have been adopted for the seat belts.