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Home >> Lexus >> 2010 >> RX 350 FWD >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Meter / Gauge / Display (Diagnostics - Introduction) >> Meter / Gauge System >> SYSTEM DIAGRAM (To 08/2009) >> System Diagram

System Diagram

  1. CAN SIGNAL 
    Fig 1: Can Communication System Diagram
    GTY269181Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. DIRECT LINE SIGNAL 
    1. Combination Meter Assembly
      Fig 2: Combination Meter Assembly System Diagram
      GTY270977Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Headup Display
      Fig 3: Headup Display System Diagram
      GTY259518Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INPUT AND OUTPUT SIGNALS OF COMBINATION METER ASSEMBLY 
    1. Meter or Gauge
      Meter or Gauge Communication Signal Sender Communication Line Receiver
      Speedometer Vehicle speed Skid Control ECU CAN (CAN No. 1 Bus) Combination Meter Assembly
      Tachometer Engine speed ECM CAN (CAN No. 1 Bus) Combination Meter Assembly
      Fuel receiver gauge Fuel level Fuel Sender Gauge Assembly Direct Line Combination Meter Assembly
      Fuel injection ECM CAN (CAN No. 1 Bus) Combination Meter Assembly
      Engine coolant temperature receiver gauge Engine coolant temperature ECM CAN (CAN No. 1 Bus) Combination Meter Assembly
      ODO/TRIP meter ODO/TRIP change Light Control Rheostat Direct Line Combination Meter Assembly
      ODO signal Skid Control ECU CAN (CAN No. 1 Bus)
      Meter illumination Illumination level Light Control Rheostat Direct Line Combination Meter Assembly
      Auto dimmer Main Body ECU (Multiplex Network Body ECU) CAN (CAN No. 1 Bus)
      Tail cancel Combination Meter Assembly CAN (CAN No. 1 Bus) Main Body ECU (Multiplex Network Body ECU)
      Lounge illumination off
      Illumination level Combination Meter Assembly CAN (CAN No. 1 Bus) Certification ECU (Smart Key ECU Assembly)
      Accessory meter assembly Accessory meter information Combination Meter Assembly Direct Line Accessory Meter Assembly
      Headup display Headup display information Combination Meter Assembly Direct Line Headup Display
      Satellite switch set signal Satellite Switch Set Direct Line Headup Display
      Audio and visual signal Radio Receiver AVC-LAN Headup Display
    2. Warning or Indicator
      Warning or Indicator Communication Signal Sender Communication Line Receiver
      High beam indicator light High beam indicator light Main Body ECU (Multiplex Network Body ECU) CAN (CAN No. 1 Bus) Combination Meter Assembly
      Turn indicator light Turn indicator light Turn Signal Flasher Direct Line Combination Meter Assembly
      Fuel level warning light Fuel level Fuel Sender Gauge Assembly Direct Line Combination Meter Assembly
      Brake warning light Brake warning light Skid Control ECU CAN (CAN No. 1 Bus) Combination Meter Assembly
      Parking brake switch Main Body ECU (Multiplex Network Body ECU) CAN (CAN No. 1 Bus)
      Brake fluid level Brake Fluid Level Warning Switch Direct Line
      SRS warning light SRS warning light Center Airbag Sensor Assembly CAN (CAN No. 1 Bus) Combination Meter Assembly
      Open door warning light Each door courtesy switch Main Body ECU (Multiplex Network Body ECU) CAN (CAN No. 1 Bus) Combination Meter Assembly
      Charge warning light Charge warning light Generator Direct Line Combination Meter Assembly
      MIL (Check engine warning light) MIL (Check engine warning light) ECM Direct Line Combination Meter Assembly
      Driver side seat belt warning light Driver side seat belt buckle switch Main Body ECU (Multiplex Network Body ECU) CAN (CAN No. 1 Bus) Combination Meter Assembly
      ABS warning light ABS warning light Skid Control ECU CAN (CAN No. 1 Bus) Combination Meter Assembly
      EPS warning light EPS warning light Power Steering ECU CAN (CAN No. 1 Bus) Combination Meter Assembly
      Air suspension indicator light*1 Air suspension indicator Suspension Control ECU CAN (CAN No. 2 Bus) Combination Meter Assembly
      Luggage mode indicator light*1 Luggage mode indicator Suspension Control ECU CAN (CAN No. 2 Bus) Combination Meter Assembly
      Automatic high beam indicator light*2 Automatic high beam indicator light Main Body ECU (Multiplex Network Body ECU) CAN (CAN No. 1 Bus) Combination Meter Assembly
      Head indicator light*3 Head indicator light Main Body ECU (Multiplex Network Body ECU) CAN (CAN No. 1 Bus) Combination Meter Assembly
      Tail indicator light*4 Taillight Main Body ECU (Multiplex Network Body ECU) CAN (CAN No. 1 Bus) Combination Meter Assembly
      Slip indicator light Slip indicator Skid Control ECU CAN (CAN No. 1 Bus) Combination Meter Assembly
      Cruise main indicator light Cruise main indicator ECM CAN (CAN No. 1 Bus) Combination Meter Assembly
      Shift position indicator Shift position ECM CAN (CAN No. 1 Bus) Combination Meter Assembly
      VSC OFF indicator light VSC OFF indicator Skid Control ECU CAN (CAN No. 1 Bus) Combination Meter Assembly
      ECO driving indicator light ECO driving indicator light ECM CAN (CAN No. 1 Bus) Combination Meter Assembly
      ECT snow indicator light ECT snow indicator ECM CAN (CAN No. 1 Bus) Combination Meter Assembly
      AWD lock indicator light*5 AWD lock indicator AWD Control ECU CAN (CAN No. 2 Bus) Combination Meter Assembly
      PCS warning light*6 PCS warning Driving Support ECU Assembly CAN (CAN No. 2 Bus) Combination Meter Assembly
      Cruise main indicator light*7 Cruise main indicator (Constant speed control mode) Driving Support ECU Assembly CAN (CAN No. 2 Bus) Combination Meter Assembly
      Cruise main indicator (Vehicle-to-vehicle distance control mode)
      Tire pressure warning light*8 Tire pressure warning Tire Pressure Warning ECU Direct Line Combination Meter Assembly
      Clearance sonar indicator light*9 Clearance sonar indicator Clearance Warning ECU CAN (CAN No. 2 Bus) Combination Meter Assembly
      AFS OFF indicator light*10 AFS OFF indicator AFS ECU (Headlight Swivel ECU Assembly) CAN (CAN No. 2 Bus) Combination Meter Assembly
      Front fog indictor light Front fog indicator Main Body ECU (Multiplex Network Body ECU) CAN (CAN No. 1 Bus) Combination Meter Assembly
      Master warning light Each system warning Skid Control ECU CAN (CAN No. 1 Bus) Combination Meter Assembly
      Power Steering ECU
      Clearance Warning ECU*9
      Certification ECU (Smart Key ECU Assembly)
      Center Airbag Sensor Assembly
      ECM
      Main Body ECU (Multiplex Network Body ECU)
      Driving Support ECU Assembly CAN (CAN No. 2 Bus)
      AWD Control ECU
      Suspension Control ECU
      AFS ECU (Headlight Swivel ECU Assembly)
      • *1: w/ Air Suspension
      • *2: w/ Automatic High Beam System
      • *3: for U.S.A.
      • *4: except U.S.A.
      • *5: for AWD
      • *6: w/ Pre-collision System
      • *7: w/ Dynamic Radar Cruise Control System
      • *8: w/ Tire Pressure Warning System
      • *9: w/ Intuitive Parking Assist System
      • *10: w/ AFS
    3. Cruise Information Display
      Cruise Information Display Communication Signal Sender Communication Line Receiver
      Average fuel consumption Engine speed ECM CAN (CAN No. 1 Bus) Combination Meter Assembly
      Fuel injection
      Vehicle speed Skid Control ECU CAN (CAN No. 1 Bus)
      ODO
      Multi-information switch Multi-information Switch (Steering Pad Switch Assembly) Direct Line
      Average vehicle speed Engine speed ECM CAN (CAN No. 1 Bus) Combination Meter Assembly
      Vehicle speed Skid Control ECU CAN (CAN No. 1 Bus) Combination Meter Assembly
      ODO
      Multi-information switch Multi-information Switch (Steering Pad Switch Assembly) Direct Line Combination Meter Assembly
      Average fuel consumption after refueling display Engine speed ECM CAN (CAN No. 1 Bus) Combination Meter Assembly
      Fuel injection
      Vehicle speed Skid Control ECU Direct Line
      ODO CAN (CAN No. 1 Bus)
      Multi-information switch Multi-information Switch (Steering Pad Switch Assembly) Direct Line Combination Meter Assembly
      Eco driving indicator zone display Eco driving indicator zone display ECM CAN (CAN No. 1 Bus) Combination Meter Assembly
      Current fuel consumption Engine speed ECM CAN (CAN No. 1 Bus) Combination Meter Assembly
      Fuel injection
      Vehicle speed Skid Control ECU Direct Line
      Vehicle speed CAN (CAN No. 1 Bus)
      Driving range Engine speed ECM CAN (CAN No. 1 Bus) Combination Meter Assembly
      Fuel injection
      Engine variation
      Vehicle speed Skid Control ECU Direct Line
      Vehicle speed CAN (CAN No. 1 Bus)
      Destination Main Body ECU (Multiplex Network Body ECU) CAN (CAN No. 1 Bus)
      Fuel level Fuel Sender Gauge Assembly Direct Line
      Multi-information display change Multi-information switch Multi-information Switch (Steering Pad Switch Assembly) Direct Line Combination Meter Assembly
    4. Multi-information Display Message
      Multi-information Display Message Communication Signal Sender Communication Line Receiver
      Open door message Each door courtesy switch Main Body ECU (Multiplex Network Body ECU) CAN (CAN No. 1 Bus) Combination Meter Assembly
      Steeling lock message Steeling lock warning Certification ECU (Smart Key ECU Assembly) CAN (CAN No. 1 Bus) Combination Meter Assembly
      Multi-information display change Multi-information switch Multi-information switch (Steering Pad Switch Assembly) Direct Line Combination Meter Assembly
      Air suspension message*1 Air suspension message Suspension Control ECU CAN (CAN No. 2 Bus) Combination Meter Assembly
      AWD message*2 AWD message AWD Control ECU CAN (CAN No. 2 Bus) Combination Meter Assembly
      Pre-collision message*3 Pre-collision message Seat Belt Control ECU CAN (CAN No. 2 Bus) Combination Meter Assembly
      Dynamic radar cruise control message*4 Dynamic radar cruise control message Driving Support ECU Assembly CAN (CAN No. 2 Bus) Combination Meter Assembly
      Sliding roof message*5 Sliding roof message Main Body ECU (Multiplex Network Body ECU) CAN (CAN No. 1 Bus) Combination Meter Assembly
      A/T fluid temperature high message A/T fluid temperature high message ECM CAN (CAN No. 1 Bus) Combination Meter Assembly
      Smart access system with push-button start message Smart access system with push-button start message Main Body ECU (Multiplex Network Body ECU) CAN (CAN No. 1 Bus) Combination Meter Assembly
      Certification ECU (Smart Key ECU Assembly)
      Engine immobiliser certification message Certification message Certification ECU (Smart Key ECU Assembly) CAN (CAN No. 1 Bus) Combination Meter Assembly
      Low washer fluid message Low washer fluid message Washer Fluid Level Warning Switch Direct Line Combination Meter Assembly
      Oil pressure message Oil pressure Oil Pressure Switch Direct Line Combination Meter Assembly
      Clearance sonar indicator*6 Clearance sonar indicator Clearance Warning ECU CAN (CAN No. 2 Bus) Combination Meter Assembly
      Headlight leveling message Headlight leveling message AFS ECU (Headlight Swivel ECU Assembly) CAN (CAN No. 2 Bus) Combination Meter Assembly
      TRAC OFF message TRAC OFF message Skid Control ECU CAN (CAN No. 1 Bus) Combination Meter Assembly
      Brake malfunction message Brake malfunction message Skid Control ECU CAN (CAN No. 1 Bus) Combination Meter Assembly
      Oil maintenance reminder light*7 Oil maintenance reminder - CAN (CAN No. 1 Bus) -
      Driving with parking brake unreleased message Parking brake switch Main Body ECU (Multiplex Network Body ECU) CAN (CAN No. 1 Bus) Combination Meter Assembly
      Vehicle speed Skid Control ECU CAN (CAN No. 1 Bus)
      • *1: w/ Air Suspension
      • *2: for AWD
      • *3: w/ Pre-collision System
      • *4: w/ Dynamic Radar Cruise Control System
      • *5: w/ Sliding Roof
      • *6: w/ Intuitive Parking Assist System
      • *7: for U.S.A.
    5. Buzzer
      Buzzer Communication Signal Sender Communication Line Receiver
      Key reminder buzzer Driver side door courtesy switch Main Body ECU (Multiplex Network Body ECU) CAN (CAN No. 1 Bus) Combination Meter Assembly
      Engine switch
      Shift down reject buzzer Shift down reject buzzer ECM CAN (CAN No. 1 Bus) Combination Meter Assembly
      Seat belt warning buzzer Driver side seat belt buckle switch Main Body ECU (Multiplex Network Body ECU) CAN (CAN No. 1 Bus) Combination Meter Assembly
      Front passenger side door courtesy switch
      Driver side door courtesy switch
      Parking brake switch
      Front passenger side seat belt buckle switch Center Airbag Sensor Assembly CAN (CAN No. 1 Bus)
      Shift position R ECM CAN (CAN No. 1 Bus)
      Shift position P
      Vehicle speed Skid Control ECU CAN (CAN No. 1 Bus)
      Driving with any door opened warning buzzer Vehicle speed Skid Control ECU CAN (CAN No. 1 Bus) Combination Meter Assembly
      Each door courtesy switch Main Body ECU (Multiplex Network Body ECU)
      Smart access system with push-button start warning buzzer Engine switch Main Body ECU (Multiplex Network Body ECU) CAN (CAN No. 1 Bus) Combination Meter Assembly
      Engine immobiliser certification buzzer Certification complete Certification ECU (Smart Key ECU Assembly) CAN (CAN No. 1 Bus) Combination Meter Assembly
      Driving with parking brake unreleased warning buzzer Parking brake switch Main Body ECU (Multiplex Network Body ECU) CAN (CAN No. 1 Bus) Combination Meter Assembly
      Vehicle speed Skid Control ECU CAN (CAN No. 1 Bus)
      Sliding roof open warning*1 Sliding roof open warning buzzer request Main Body ECU (Multiplex Network Body ECU) CAN (CAN No. 1 Bus) Combination Meter Assembly
      Dynamic radar cruise control low speed cancel buzzer*2 Dynamic radar cruise control low speed cancel Driving Support ECU Assembly CAN (CAN No. 2 Bus) Combination Meter Assembly
      • *1: w/ Sliding Roof
      • *2: w/ Dynamic Radar Cruise Control System
    6. Others
      Signal Communication Signal Sender Communication Line Receiver
      Vehicle speed signal Vehicle speed Skid Control ECU Direct Line Combination Meter Assembly
      Vehicle speed Combination Meter Assembly Direct Line ECM
      Wiper Switch ECU
      Radio Receiver
      Display and Navigation Module Display*1
      Stereo Component Amplifier*2
      Power Management Control ECU
      TCM
      Front passenger side seat belt warning light Front passenger side seat belt buckle switch Center Airbag Sensor Assembly CAN (CAN No. 1 Bus) Combination Meter Assembly
      Front Seat Inner Belt Assembly RH*3 Direct Line Combination Meter Assembly
      Front passenger side seat belt warning light Combination Meter Assembly Direct Line Accessory Meter Assembly*4 or Radio Receiver Assembly*1
      • *1: w/ Navigation System
      • *2: for Separate Type Amplifier System
      • *3: w/o Occupant Classification System
      • *4: w/o Navigation System
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