Chassis Automatic Transaxle 4WD System Suspension System Air Suspension System Brake Tire Pressure Warning System

[Major Difference] (from U140E/F) Chassis -A -W -Q -V Automatic Transaxle U151E/F Automatic Transaxle U151E, U151F are based on U150E (’03 ES300) Valve body is changed for 5-speed application Direct / O/D clutch and 2 solenoid valves are added Multi-mode control is newly adopted [Major Difference] (from U140E/F) Basic construction and operation are same as ’03 ES300

Differential Gear Ratio Chassis -A -W -Q -V Automatic Transaxle U151E/F Automatic Transaxle Gear ratio Model ’04 RX330/300 ’03 RX300 ’03 ES300 Engine 3MZ-FE 1MZ-FE Transaxle U151E U151F U140E U140F U150E Gear Ratio 1st 4.235  3.938 2nd 2.360 2.194 3rd 1.517 1.411 4th 1.047 1.019 0.973 5th 0.756  0.703 Rev. 3.378 3.141 Counter Gear Ratio Differential Gear Ratio 3.478 3.080 3.291 Fluid Type ATF Type T-IV Oil Capacity Liters (US qts, lmp.qts) 9.1 (9.5, 7.9) 8.4 (8.9, 7.4) SNOW mode is used for all modes except -V

Chassis Automatic Transaxle Controls -W -Q -V Automatic Transaxle Controls This transaxle uses following controls Multi-mode Control Clutch to Clutch Pressure Control Centrifugal Fluid Pressure Canceling Mechanism Line Pressure Optimal Control Clutch Pressure Optimal Control Flex Lock-up Clutch Control Shifting Control in Uphill/Downhill Traveling Flex lock-up control is used only for deceleration to improve fuel economy

Chassis Automatic Transaxle Multi-mode Control -W -Q -V Automatic Transaxle Multi-mode Control The shift range position is changed by moving forward and backward the shift lever This system is newly adopted for all models except –A as STD, -A model as OPT Multi-mode control is range hold type Basic construction is same as E-shift (IS300/IS300 SportCross, GS300)

Chassis Automatic Transaxle Multi-mode Control -W -Q -V Automatic Transaxle Multi-mode Control “S” mode position and “S” mode indicator light are added S 4 P R N D P R N D S + - “S” Mode Indicator Light Shift Range Position Indicator Light S Mode Position

Chassis Automatic Transaxle Multi-mode Control System diagram -A -W -Q -V Automatic Transaxle Multi-mode Control System diagram Shift Lever Ignition Timing Advance Control Engine ECU (ECM) Shift Up/down Signal S 1 P R N D Engine CPU ECT CPU BEAN Transaxle Control Signal Combination Meter

Chassis Automatic Transaxle Multi-mode Control -W -Q -V Automatic Transaxle Multi-mode Control Shift range position is invariably in the 4-range, when “S” mode position selects [Shift Program] S 4 P R N D Shift Range Position Indicator Shift Range Position (w/o Multi-mode) Usable Gear 5 D 5 th 1 st 4 4 th 1 st 3 3 th 1 st 2 2 th 1 st 1 1 st P R N D S + - S 4 D

MIL / Check Engine Warning Light Chassis -A -W -Q -V Automatic Transaxle Multi-mode Control When the engine and ECT ECU detect a malfunction, MIL / check engine warning light illuminates MIL / Check Engine Warning Light

Chassis Automatic Transaxle DTC -W -Q -V Automatic Transaxle DTC Some DTCs is newly added for the 5-speed application DTC No. Detection Item P0711 Transmission fluid temp. sensor malfunction (Fluid temp. sensor) P0760 Shift solenoid C malfunction (Solenoid valve SL3) P0763 Shift solenoid C Electrical malfunction (Solenoid valve SL3) P1815 Solenoid valve SR malfunction P1818 Solenoid valve SR electrical malfunction

Chassis 4WD System Overall -Q -V 4WD System Overall LSD of center differential is discontinued and LSD function is operated by brake control system Speed Sensor M Engine ECU (ECM) Throttle Control Motor Skid Control ECU Brake Actuator Center Differential (without LSD Mechanism)

Chassis 4WD System LSD Function Difference with A-TRAC (A-TRC) -A -W -Q -V 4WD System LSD Function Difference with A-TRAC (A-TRC) System Operation LSD Function This system applies a brake to the wheel which slipped, and is also controlling the throttle valve opening angle A-TRAC (A-TRC) This system only applies a brake to the wheel which slipped

Chassis Suspension System Front and Rear Suspension Overall -A -W -Q MacPherson Strut Type with Multi-leaf Type Shock Absorber Illustration is 4WD model Dual Link MacPherson Strut Type with Multi-leaf Type Shock Absorber Air Suspension equipped for –A, -W models as OPT

Chassis Air Suspension System Overall -W Air Suspension System Overall This system has following functions Automatic Vehicle Height Control Vehicle Speed Sensing Control Vehicle Height Switching Control - HI Mode [+30 mm (1.2 in.)] - N Mode - LO Mode [-15 mm (-0.6 in.)] - Access Mode [ -30 mm (-1.2 in)] [Main Function] Air suspension system is used for –A and –W models as optional equipment

Chassis Air Suspension System System Diagram (Mechanical Parts) -A -W Vehicle Speed Sensor (RL, RR) Crankshaft Position Sensor OFF Pneumatic Tank Suspension Control ECU AIR SUS Relay Pneumatic Cylinder (FR) Pneumatic Cylinder (RR) Dryer Height Control Cleaner Pneumatic Cylinder (FL) Pneumatic Cylinder (RL) Compressor Unit : Air Flow Passage : Input Signal : Output Signal

Chassis Air Suspension System System Diagram (Electrical Parts) -A -W Vehicle Speed Sensor (RL, RR) Crankshaft Position Sensor Compressor Unit OFF Pneumatic Tank Suspension Control ECU AIR SUS Relay Height Control Indicator Light Height Control Switch Easy Access Mode Switch Stop Light Switch Height Control OFF Switch Compressor Front Height Control Sensors Rear Height Control Sensors Pneumatic Tank Solenoid Valve Height Control Compressor Solenoid Valve Height Control Solenoid Valve Front Height Control Solenoid Valve Rear : Air Flow Passage : Input Signal : Output Signal

Height Control Indicator Light Height Control OFF Switch Chassis -A -W Air Suspension System Layout of Switches and Indicator Height Control Indicator Light Height Control Indicator Light Height Control Switch Height Control OFF Indicator Light Access Model Indicator Access Mode Switch Height Control OFF Switch OFF

Chassis Air Suspension System Vehicle Height Switching Control Three vehicle heights can be selected by operating the height control switch [Height Control Indicator Light] +30 mm (1.2 in.) HI Mode: N Mode: LO Mode: -15 mm (-0.6 in.)

Chassis Air Suspension System Vehicle Speed Sensing Control -W Air Suspension System Vehicle Speed Sensing Control Vehicle height is automatically controlled by vehicle speed HI Mode: +30 (1.2) HI mode is held for 10 sec. and shifts to N mode after that Ride Height [mm (in.)] N Mode: 0 N’ Mode: -7 (-2.8) LO Mode: -15 (0.6) Access Mode: -30 (-1.2) 31 (18.8) 50 (31) 80 (50) 100 (62.5) Vehicle Speed [km/h (MPH)]

Access Model Indicator Chassis -A -W Air Suspension System Access Mode Control Accesses to the vehicle and easy loading and unloading operation [N Mode] [Access Mode] About 30 mm (1.2 in.) Access Model Indicator

Chassis Air Suspension System Access Mode Control Operating condition -W Air Suspension System Access Mode Control Operating condition 1. Access Mode Switch “ON” 2. Ignition Switch Turn to OFF Access Mode Operation NOTE: When vehicle height is HI mode, this mode dose not operate Access Model Switch

Service Point Air Suspension System Precautions for Servicing -W Air Suspension System Precautions for Servicing Push the Height control OFF switch, when jacking up the vehicle OFF When jacking up, be sure to turn off the height control air suspension. Otherwise, the vehicle height may changed because of the automatic leveling function, resulting in an unexpected accident

Service Point Air Suspension System Precautions for Servicing -W Air Suspension System Precautions for Servicing In the removal or reinstallation of height control valve or pneumatic cylinder, when there is little air in the system, be careful of the following case Action Caution Reason Jacking Down When jacking down, all the air tubes are reconnected For diaphragm of pneumatic cylinder protection Steering Do not turned the steering wheel, when the tires are grounded Replenishing of Air When replenishing of air, Stop the engine approximately 1 minute later. After about 10 minutes have elapsed, restart the engine For compressor protection [Compressor Protection Function] Because this system is provided with a compressor protection function, its maximum continuous operation is set to 100 seconds. If 100 seconds have elapsed while the vehicle height is being raised under height control, the upward movement stops automatically. After approximately 10 minutes have elapsed in the stopped state, the upward movement resumes automatically until the target vehicle height is reached

Remove, Install, Adjust and Replace Service Point -A -W Air Suspension System Revise the Offset Value of Vehicle Height Operate the revision in the following cases Parts Revision Remove, Install, Adjust and Replace Height Control Sensor Related Parts of Height Control Sensor Only the sensors which serviced Replace Suspension Control ECU All Sensors NOTE: Do not adjust compensation of vehicles height with the adjustment rod of a height control sensor

Service Point Air Suspension System -W Air Suspension System Revise the Offset Value of Vehicle Height Revision procedure 1. Start the Engine 2. Start the “HEIGHT OFFSET” mode 3. Operate the following procedure

Service Point Air Suspension System -W Air Suspension System Revise the Offset Value of Vehicle Height Revision procedure

Front Measure Point = (A-B) Rear Measure Point = (C-D) Reference -A -W Air Suspension System Revise the Offset Value of Vehicle Height Measure vehicle height Front [Measuring Points] A: Ground clearance of front wheel center B: Grand clearance of lower suspension arm No. 2 set bolt center C: Grand clearance of rear wheel center D: Grand clearance of strut rod set bolt center A B D C Front Measure Point = (A-B) Rear Measure Point = (C-D)

Service Point Air Suspension System -W Air Suspension System Revise the Offset Value of Vehicle Height Revision procedure NOTE: One of a millimeter display and the inch displays can be chosen

Standard Vehicle Height Reference -A -W Air Suspension System Revise the Offset Value of Vehicle Height Vehicle height specifications Items Standard Vehicle Height Front Rear 4WD -A 111.9 mm (4.41 in.) 41.1 mm (1.62 in.) -W 116.9 mm (4.60 in.) 36.1 mm (1.42 in.) 2WD 

Service Point Air Suspension System -W Air Suspension System Revise the Offset Value of Vehicle Height Revision procedure 4. Vehicle heights are automatically adjusted by Suspension control ECU 5. It checks whether vehicle height is specified value

Chassis Air Suspension System System Failure -W Air Suspension System System Failure If a malfunction occurs in the system The “N” mode is automatically selected The height control “OFF” indicator light blinks

Service Point Air Suspension System DTC Chart -A -W DTC No. Detection Item OFF indicator 5-digit 2-digit C1711 11 Open or short circuit in right front height control sensor circuit Blink C1712 12 Open or short circuit in left front height control sensor circuit  C1713 13 Open or short circuit in right rear height control sensor circuit C1714 14 Open or short circuit in left rear height control sensor circuit C1735 35 Open or short circuit in exhaust solenoid valve circuit C1737 31 Open or short circuit in right front height control solenoid valve circuit C1738 32 Open or short circuit in left front height control solenoid valve circuit C1739 33 Open or short circuit in right rear front height control solenoid valve circuit C1740 34 Open or short circuit in left rear front height control solenoid valve circuit

Service Point Air Suspension System DTC Chart (Continued) -A -W DTC No. Detection Item OFF indicator 5-digit 2-digit C1741 41 Open or short circuit in AIR SUS relay circuit Blink C1742 42 Lock, open of short circuit in height control compressor circuit  C1744 44 Open or short circuit in pneumatic tank solenoid valve circuit C1751 51 Continuous electric current to height control compressor circuit C1761 61 Suspension control ECU malfunction C1774 74 Power voltage drop C1776 76 Speed sensor circuit malfunction C1779 79 Crankshaft position sensor circuit

Chassis Brake Front and Rear Brake Overall -A -W -Q -V ABS with EBD, BRAKE ASSIST, TRAC and VSC as STD 15-inch Solid Disc Brake 17-inch Ventilated Disc Brake

Chassis Brake Specifications -A -W -Q -V Engine Type New RX330/300 Previous Model Master Cylinder Type Portless + Portless  Diameter [mm (in.)] 22.00 (0.87) 25.40 (1.00) Brake Booster 4WD: 10.5” 2WD: 9.5” 8.5” + 8.5” Front Brake 17” Ventilated Disc 16” Ventilated Disc Wheel Cylinder Dia. [mm (in.)] 63.5 (2.50) 60.33 (2.38) Rotor Size (D x T) [mm (in.)] 319 x 28 (12.56 x 1.10) 296 x 28 (10.83 x 1.10) Rear Brake 15” Solid Disc 41.28 (1.63) 34.90 (1.38) 288 x 10 (11.34 x 0.39) 269 x 10 (10.60 x 0.39) Brake Control STD with EBD, Brake Assist, TRAC and VSC STD

Gear type Actuator Pump Chassis -A -W -Q -V Brake ABS with EBD, BRAKE ASSIST, TRAC and VSC Actuator pump is changed to trochoid gear type from piston type Solenoid Portion Motor ECU Portion Gear type Actuator Pump

Piston Type (conventional type) Chassis -A -W -Q -V Brake ABS with EBD, BRAKE ASSIST, TRAC and VSC Trochoid gear type actuator pump is used to reduce operating noise Torochoid Gear Type Piston Type (conventional type) Quantity Quantity Time Time Small Pulsation  Small Vibration Large Pulsation  Large Vibration

Tire Pressure Monitor ECU Chassis -A Tire Pressure Warning System Overall This system is controlled by skid control ECU Brake Actuator Tire Pressure Monitor ECU Speed Sensor Ambient Temp. Sensor Engine ECU (ECM) Skid Control ECU BEAN Tire Pressure Warning Standardization Switch Combination Meter Tire pressure warning system is used for -A models as standard equipment Tire pressure monitor ECU integrated to Skid control ECU Tire Pressure Warning Light Stop Light Switch

Tire Pressure Waning Light Tire Pressure Condition Chassis -A Tire Pressure Warning System Tire Pressure Warning Light Low tire pressure warning Tire Pressure Waning Light Tire Pressure Condition Standard 210 kPa (2.1 kgf/cm2, 30.0 psi) Warning Less than 105 – 126 kPa* ( 10.5 – 12.6 kgf/cm2, 15.0 - 18.0 psi) ON Warning condition: Tire pressure less than 40-50% for normal tire pressure *: detection pressure changes with tire size or kinds

Chassis Tire Pressure Warning System Tire Pressure Detecting Method This system uses 2 types of detection method Tire Pressure Warning Light Speed Signals Ambient Temp. Signal Pressure Reduction Judgment Presume resonance frequency of tire Correction Resonance Frequency of Tire Relative Wheel Speed Even if two or more tires are low pressures, this detection method is detectable Relative Wheel Speed Tire Pressure Skid Control ECU

Chassis Tire Pressure Warning System Tire Pressure Warning Light When the malfunction is detected Priority of warning light Tire Pressure Warning Light System Condition 1 ON Always Tire pressure warning light circuit malfunction 2 Blinks System malfunction (Malfunction in skid control ECU, speed sensor etc.) 3 During 3 sec. (after ignition switch ON) Initial Check 4 Start the initialization mode 5  Initialization is not completed (You must initialize the system) 6 Detect pressure reduction 0.5 sec. 1 Hz 1 sec. Blink 3 times 0.25 sec. 2 Hz

Tire Pressure Warning Light Service Point -A Tire Pressure Warning System DTC (Diagnosis Trouble Code) DTC No. Detection Item Tire Pressure Warning Light C2106 /11 Stop light switch not turn off Blink (1Hz) - / 13 Malfunction in brake control system

Tire Pressure Warning Standardization Switch Chassis -A Tire Pressure Warning System Initialization Operate the initialization in the following cases Tire Pressure Warning Standardization Switch [Conditions] After vehicle is shipped (Tire pressure warning indicator blinks by 2Hz) When a tire or a wheel is replaced When a tire pressure is adjusted

Service Point Tire Pressure Warning System Initialization Initialization procedure 1. Adjust tire air inflation pressure (all tires) 2. Turn the ignition key to ON 4. The initial adjustment is completed after driving at the speeds of 30 km/h (19 mph) or more about 30 minutes – a hour 3. Push and hold the tire pressure warning standardization switch until the tire pressure warning light blinks for three times Blinks three times