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1、 Lexus GX470GX470 Line-up : 2UZ-FE engine with A750F (5-speed Super ECT)Line-off : November 2002Body : 5-door wagonENGINE2UZ-FE engine feature1.32 + 32 bit CPU2.O2 sensors cup type3.Starter holding function 4.New DTC : meets SAE code and it divided to more detailed code structure5.SFTP & LEV ?6. Eva
2、porative emission control for LEV II application7.No-contact type throttle position sensor / Accelerator sensorCCO1.2UZ-FE: Mani-con 1.1Lx2 thin.75micron m ceramic with Pt coated, U/F 1.3L X 1 (for USA LEV)-Reference for 4 Runner-(2.1GR-FE: Mani-con 1.1L x 2 thin.75micron m ceramic with Pt coated, U
3、/F 1.1L X 1 (for USA LEV)Alternator1. SC alternator (SC1 type 130A)Fuel system1. HDPE resin fuel tank (Multi layer 6 layers) with SUS filler pipe (87L) /(15y / 150k mil)2. Quick turn fuel cap with tether2. Nylon type tube & hose with multi layer *HDPE resin(High density polyethylene)Immobilizer1. Se
4、parate ECU : Key ID is memorized in Immobi ECU 2. Card key with Immobi tip 3. Door open /close for key registration4. Main 5 keys, Sub 3 keys can be registered5. Immobi start condition: case 1 / IG key pulls off case 2 / 20 sec. after IG key turns to ACC or LockStarting system1.Starting holding func
5、tion-ECM controls this function-NE signal use for engine running detectionEngine speed : 700r.p.m. or 500r.p.m. and more than 1 sec.-Continuous activating time Coolant temp. between 20 to 80 degrees Celsius : max.5 seconds for one operationCoolant temp. is extremely low : max. 20 seconds for one ope
6、ration Coolant temp. is more than 100degrees Celsius : max. 2seconds for one operation-Protection for over run : If NE signal is more than 1,200r.p.m. , this function does not activate.-Starter operates by key more than 30sec., system stops the operation for starter protection -During the starter op
7、eration, ACC power is cut CHASSISTransfer VF3B to VF4B(M), (Ref.4Runner uses VF4AM)1.Fr.60 : Rr.40 torque distribution ratio type torque sensing center differential.At front higher speed condition approx. 30 : 70, at rear higher speed as spin approx. 53 : 47. This ratio is decided by total operating
8、 area of clutches in center differential. 2.Center differential type change makes 50 mm shorter than current type transfer, lesser weight 1.8kg, number of parts reduced and rigidity increased3.This torque distribution ratio system increases response of steering, increase drive feeling at the corneri
9、ng with acceleration to reduce under steering feeling4. Semi-motor shift (Diff. locking by motor, H-L shift by manual lever) H4-H4Lock-L4-L4Lock (Reference 4 Runner)2UZ-FE : Full motor shift control for H4-H4Lock-L4-L4Lock1GR-FE : Full motor shift control for H2-H4-H4Lock-L4-L4Lock ATM feature1. A75
10、0 F, 5-speed Super ECT Automatic Transmission 2.Torque converter -Converter unit uses smaller type 15% flatness (Vertical / horizontal rate: thinner ) comparing with A34# series for lighter weight and compact design-Flex lock up (4th and 5th gears are applied)3. Transmission-3 planetary units (Front
11、, center, rear) -Power plant rigidity 15% increase for low vibration / noise, 10% weight less-Aluminum planetary carrier 50% weight less from current type as for A340F etc.4.Conrol system -Clutch to clutch control with linear solenoid valve (SL1, SL2) for 4th 5th shift control (no one way clutch) -C
12、entrifugal pressure release control -Line pressure control by linear solenoid (SLT)-Clutch pressure control by linear solenoid (SLT, SL1) -AI-Shift (Basic shift patter control / Road condition support control / Drivers intention support control)-Two AT fluid temp sensors are provided in valve body :
13、one is for indicator & lock up control, other is for pressure control with DTC detection function application 5.Non crescent oil pumpBrake system (Hard unit)No information for GX470 (Reference, Prado & 4 Runner information)1. Fr. Prado :17 inch Disc, adopt 4 opposed pistons, 4Runner :16 inch STD, 17
14、inch OPT Rr. Disc brake system adopts floating type caliper2.Double link pedal (Prado)3. Hydro booster, 4. Offset type PKB lever (Toyota new) that lever and cable winder portion are offset to minimize spaceBrake system (Electrical control system)1. Speed sensor MPU to Active wheel speed sensor MRE t
15、ype (Rotational direction detection type)2. ABS with EBD, BA, TRAC and VSC are equipped3.DAC(Down-hill Assist Control System) -Operating condition : DAC SW on, L4 range, no accele & brake pedal operation, less than 25km/h -Operation : Fixed speed driving by 4 wheel optimized brake application without tire locking. It realizes stable down slope driving without accel. brake operation. (5 to 7km/h, reverse 3 to 5 km/h) -System fail-safe : Continuous operation makes actuator heating up buzzer sounds and operation gradually stops4.
