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Home >> Lexus >> 2018 >> GS 450h Base >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Meter / Gauge System (Diagnostics) >> Meter / Gauge System >> System Diagram [09/2014 - 10/2015] >> System Diagram [09/2014 - 10/2015]

System Diagram [09/2014 - 10/2015]

  1. CAN SIGNAL (See article) 
  2. DIRECT LINE SIGNAL 
    Fig 1: Meter / Gauge / Display System Diagram
    GTY418811Courtesy 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 assembly CAN Combination meter assembly
      Tachometer Engine speed ECM CAN Combination meter assembly
      Fuel receiver gauge Fuel level Fuel sender gauge assembly Direct line Combination meter assembly
      No. 2 fuel sender gauge assembly
      Vehicle speed Skid control ECU assembly CAN Combination meter assembly
      Shift position Power management control ECU
      Mode indicator
      Drivable state display signal
      Engine coolant temperature receiver gauge Engine coolant temperature ECM CAN Combination meter assembly
      Hybrid system indicator Eco-zone indicator level Power management control ECU CAN Combination meter assembly
    2. Warning or Indicator
      Warning or Indicator Communication Signal Sender Communication Line Receiver
      Turn indicator light Turn signal switch Windshield wiper switch assembly Direct line Combination meter assembly
      Hazard warning signal switch Multimedia module receiver assembly
      Hazard answer-back Main body ECU CAN
      Turn signal light operation Combination meter assembly Direct line Turn signal lights
      Front fog indicator light Front fog indicator light Main body ECU CAN Combination meter assembly
      High beam indicator light High beam indicator light Main body ECU CAN Combination meter assembly
      Headlight indicator light*1 Headlight Main body ECU CAN Combination meter assembly
      Taillight indicator light*2 Taillight Main body ECU CAN Combination meter assembly
      Open door warning light Each door courtesy switch Main body ECU CAN Combination meter assembly
      Front seat belt warning light Driver side and passenger side seat belt buckle switch Main body ECU CAN Combination meter assembly
      SRS warning light SRS warning light Center airbag sensor assembly CAN Combination meter assembly
      Master warning light Each system warning Each system ECU CAN Combination meter assembly
      MIL MIL ECM Direct line Combination meter assembly
      Charge warning light Charge warning light Power management control ECU CAN Combination meter assembly
      EPS warning light EPS warning light Power steering ECU assembly CAN Combination meter assembly
      AFS OFF indicator light AFS OFF indicator light Headlight swivel ECU assembly CAN Combination meter assembly
      Brake warning light Brake warning light Skid control ECU assembly CAN Combination meter assembly
      Brake fluid level
      Parking brake warning light Parking brake warning light Parking brake ECU assembly Direct line Combination meter assembly
      EPB*/ECB* warning light EPB*/ECB* warning light Parking brake ECU assembly Direct line Combination meter assembly
      Cruise indicator light Cruise indicator light Power management control ECU CAN Combination meter assembly
      Radar cruise indicator light*3 Cruise main indicator (Constant vehicle speed mode) Power management control ECU CAN Combination meter assembly
      Cruise main indicator (Vehicle-to-vehicle distance control mode)
      SET indicator light Cruise set indicator light Power management control ECU CAN Combination meter assembly
      Clearance sonar indicator light*4 Clearance sonar indicator light Clearance warning ECU assembly CAN Combination meter assembly
      Fuel level warning light Fuel level Fuel sender gauge assembly Direct line Combination meter assembly
      No. 2 fuel sender gauge assembly
      ABS warning light ABS warning light Skid control ECU assembly CAN Combination meter assembly
      Slip indicator light Slip indicator light Skid control ECU assembly CAN Combination meter assembly
      VSC OFF indicator light VSC OFF indicator light Skid control ECU assembly CAN Combination meter assembly
      PCS warning light*5 PCS warning light Seat belt control ECU CAN Combination meter assembly
      LKA indicator light*6 LKA indicator light Driving support ECU assembly CAN Combination meter assembly
      Tire pressure warning light Tire pressure warning light Main body ECU CAN Combination meter assembly
      EV mode indicator light EV mode indicator light Power management control ECU CAN Combination meter assembly
      READY indicator light READY indicator light Power management control ECU CAN Combination meter assembly
      STA ON
      Brake hold standby indicator light Brake hold standby indicator light Skid control ECU assembly CAN Combination meter assembly
      Brake hold operated indicator light Brake hold operated indicator light Skid control ECU assembly CAN Combination meter assembly
      • EPB*: Electric Parking Brake System
      • ECB*: Electronically Controlled Brake System
      • *1: for U.S.A.
      • *2: for Canada
      • *3: w/ Dynamic Radar Cruise Control System
      • *4: w/ Intuitive Parking Assist System
      • *5: w/ Pre-collision System
      • *6: w/ Lane-keeping Assist System
    3. Multi-information Display
      Multi-information Display Communication Signal Sender Communication Line Receiver
      Energy flow display Energy flow Power management control ECU CAN Combination meter assembly
      Outside temperature Outside temperature Air conditioning amplifier assembly CAN Combination meter assembly
      Current fuel consumption Engine speed ECM CAN Combination meter assembly
      Fuel injection
      Vehicle speed Skid control ECU assembly
      ODO
      READY indicator Power management control ECU
      Average fuel consumption after refueling Engine speed ECM CAN Combination meter assembly
      Fuel injection
      Vehicle speed Skid control ECU assembly
      ODO
      READY indicator Power management control ECU
      Average fuel consumption Engine speed ECM CAN Combination meter assembly
      Fuel injection
      Vehicle speed Skid control ECU assembly
      ODO
      READY indicator Power management control ECU
      Average vehicle speed Engine speed ECM CAN Combination meter assembly
      Vehicle speed Skid control ECU assembly
      ODO
      READY indicator Power management control ECU
      Driving range Engine speed ECM CAN Combination meter assembly
      Fuel injection
      Engine variation
      ODO Skid control ECU assembly
      READY indicator Power management control ECU
      Fuel level Fuel sender gauge assembly Direct line
      Tire pressure Tire pressure level Main body ECU CAN Combination meter assembly
      Rheostat Rheostat Trip switch Direct line Combination meter assembly
      ODO/TRIP meter ODO signal Skid control ECU assembly CAN Combination meter assembly
      ODO/TRIP change TRIP switch Direct line Combination meter assembly
      TRIP reset
      VGRS Test Mode display*10 VGRS test mode display Front steering control ECU CAN Combination meter assembly
      DRS Test Mode display*10 DRS test mode display Rear steering control ECU CAN Combination meter assembly
      Adjusting LKA Camera display*2 Adjusting LKA camera display Driving support ECU assembly CAN Combination meter assembly
      Adjusting Front Radar Beam display*3 Adjusting front radar beam display Driving support ECU assembly CAN Combination meter assembly
      Checking Cruise Control C/D display*3 Checking cruise control C/D display Power management control ECU CAN Combination meter assembly
      Checking Cruise Control Brake display*3 Checking cruise control C/D display Power management control ECU CAN Combination meter assembly
      Brake! display*4 Brake! display Driving support ECU assembly CAN Combination meter assembly
      Brake Malfunction display Brake malfunction display Skid control ECU assembly CAN Combination meter assembly
      Open door message Each door courtesy switch Main body ECU CAN Combination meter assembly
      Clearance warning*5 Clearance warning Clearance warning ECU assembly CAN Combination meter assembly
      Check Park Sonar System display*5 Check park sonar system display Clearance warning ECU assembly CAN Combination meter assembly
      Clean Park Sonar display*5 Clean park sonar display Clearance warning ECU assembly CAN Combination meter assembly
      Auto Power OFF to Conserve Battery display Battery Certification ECU (Smart key ECU assembly) CAN Combination meter assembly
      Shift to P position when starting display Shift to P position when starting display Certification ECU (Smart key ECU assembly) CAN Combination meter assembly
      Check Power Steering System display Check power steering system display Power steering ECU assembly CAN Combination meter assembly
      Release Parking Brake display Release parking brake display Parking brake ECU assembly CAN Combination meter assembly
      To park the vehicle, shift to P position display To park the vehicle, shift to P position display Certification ECU (Smart key ECU assembly) CAN Combination meter assembly
      Key not detected display Key not detected display Certification ECU (Smart key ECU assembly) CAN Combination meter assembly
      LKA canceled Keep hands on steering wheel display*2 LKA canceled keep hands on steering wheel display Driving support ECU assembly CAN Combination meter assembly
      Parking Brake Overheat display Parking brake overheat display Parking brake ECU assembly CAN Combination meter assembly
      Check SRS Airbag System display Check SRS airbag system display Center airbag sensor assembly CAN Combination meter assembly
      Check ABS display Check ABS display Skid control ECU assembly CAN Combination meter assembly
      Clean Radar Sensor display*3 Clean radar sensor display Power management control ECU CAN Combination meter assembly
      Cruise Control not available display*3 Cruise control not available display Power management control ECU CAN Combination meter assembly
      LKA not available display*2 LKA not available display Driving support ECU assembly CAN Combination meter assembly
      Check Access System with Elec. Key display Check access system with elec. Key display Certification ECU (Smart key ECU assembly) CAN Combination meter assembly
      BSM not available display*6 BSM not available display Blind spot monitor sensor CAN Combination meter assembly
      Check Cruise Control System display Check cruise control system display Power management control ECU CAN Combination meter assembly
      Check LKA System display*2 Check LKA system display Driving support ECU assembly CAN Combination meter assembly
      Check PCS System display*4 Check PCS system display Driving support ECU assembly CAN Combination meter assembly
      Check BSM System display*6 Check BSM system display Blind spot monitor sensor CAN Combination meter assembly
      Engine Oil pressure Low display Engine oil pressure low display Engine oil pressure switch assembly Direct line Combination meter assembly
      Transmission Fluid High temperature display Transmission fluid high temperature display Power management control ECU CAN Combination meter assembly
      Check VGRS System display*10 Check VGRS system display Front steering control ECU CAN Combination meter assembly
      Check DRS System display*10 Check DRS system display Rear steering control ECU CAN Combination meter assembly
      Parking Brake Inoperable display Parking brake inoperable display Parking brake ECU assembly Direct line Combination meter assembly
      Check Parking Brake System display Check parking brake system display Parking brake ECU assembly CAN Combination meter assembly
      Turn power OFF display Turn power off display Certification ECU (Smart key ECU assembly) CAN Combination meter assembly
      Key detected in vehicle display Key detected in vehicle display Certification ECU (Smart key ECU assembly) CAN Combination meter assembly
      Turn Light Off display Turn light off display Main body ECU CAN Combination meter assembly
      Moon Roof opened display*7 Moon roof opened display Main body ECU CAN Combination meter assembly
      Window opened display Window opened display Main body ECU CAN Combination meter assembly
      Window/Moon Roof opened display*7 Window/moon roof opened display Main body ECU CAN Combination meter assembly
      Depress brake pedal, touch POWER switch with key display Depress brake pedal, touch power switch with key display Certification ECU (Smart key ECU assembly) CAN Combination meter assembly
      Depress brake pedal and push POWER switch to start display Depress brake pedal and push power switch to start display Certification ECU (Smart key ECU assembly) CAN Combination meter assembly
      Shift to P position when starting display Shift to P position when starting display Certification ECU (Smart key ECU assembly) CAN Combination meter assembly
      Steering Lock active display Steering lock active display Certification ECU (Smart key ECU assembly) CAN Combination meter assembly
      The Parking Brake has been automatically locked display The parking brake has been automatically locked display Parking brake ECU assembly CAN Combination meter assembly
      Key Battery Low display Key battery low display Certification ECU (Smart key ECU assembly) CAN Combination meter assembly
      Check Headlight Leveling System display Check headlight leveling system display Headlight swivel ECU assembly CAN Combination meter assembly
      Check AFS display Check AFS display Headlight swivel ECU assembly CAN Combination meter assembly
      Engine Oil Level Low message Oil level Engine oil level sensor Direct line Combination meter assembly
      Engine coolant temperature ECM CAN
      Washer Fluid Low display Washer fluid low display Level warning switch assembly Direct line Combination meter assembly
      Fuel Low display Fuel low display Fuel sender gauge assembly Direct line Combination meter assembly
      No. 2 fuel sender gauge assembly
      TRAC OFF display TRAC off display Skid control ECU assembly CAN Combination meter assembly
      Maintenance required soon display Maintenance required soon display ECM CAN Combination meter assembly
      Maintenance required display Maintenance required display ECM CAN Combination meter assembly
      Resetting Maintenance Data display Resetting maintenance data display ECM CAN Combination meter assembly
      Resetting of Maintenance Data incomplete display Resetting of maintenance data incomplete display ECM CAN Combination meter assembly
      POWER ON display Power on display Certification ECU (Smart key ECU assembly) CAN Combination meter assembly
      PCS temporarily not available display*4 PCS temporarily not available display Seat belt control ECU CAN Combination meter assembly
      Theft Sensor OFF display Theft sensor off display Main body ECU CAN Combination meter assembly
      Theft Sensor ON display Theft sensor on display Main body ECU CAN Combination meter assembly
      Maintenance Mode display Maintenance mode display Power management control ECU CAN Combination meter assembly
      Certification Mode display Certification mode display Power management control ECU CAN Combination meter assembly
      T/M LEARNING display Hybrid transmission fluid pressure currently being learned display signal Power management control ECU CAN Combination meter assembly
      T/M ERROR display Hybrid transmission fluid pressure initialization learning malfunction signal Power management control ECU CAN Combination meter assembly
      Stop the vehicle in a safe place Shift to P position display Shift selection P request Power management control ECU CAN Combination meter assembly
      Shift to P position when parked display Shift selection P request Power management control ECU CAN Combination meter assembly
      N position display N position display Power management control ECU CAN Combination meter assembly
      Traction battery preservation mode Restart after shifting the P position display Traction battery preservation mode restart after shifting the P position display Power management control ECU CAN Combination meter assembly
      Traction Battery Low Charges when not in N position display Traction battery low charges when not in N position display Power management control ECU CAN Combination meter assembly
      Depress the brake pedal Check Brake Hold System display Brake hold control cancellation alert signal Skid control ECU assembly CAN Combination meter assembly
      Brake Hold not available on slope display Brake hold control non-operation signal Skid control ECU assembly CAN Combination meter assembly
      Check Hybrid System display Check hybrid system display Power management control ECU CAN Combination meter assembly
      Check Brake System display Check brake system display Skid control ECU assembly CAN Combination meter assembly
      Check Brake Hold System display Check brake hold system display Skid control ECU assembly CAN Combination meter assembly
      Be careful using Brake Hold on icy roads! display Frozen road surface control display signal Skid control ECU assembly CAN Combination meter assembly
      Depress the brake pedal to release Brake Hold display Control non-cancellation signal Skid control ECU assembly CAN Combination meter assembly
      Close the door to use Brake Hold display Door open control non-operation signal Skid control ECU assembly CAN Combination meter assembly
      Fasten the seat belt to use Brake Hold display Seat belt unbuckled control non-operation signal Skid control ECU assembly CAN Combination meter assembly
      Close the hood or the trunk to use Brake Hold display Trunk/engine hood open control non-operation signal Skid control ECU assembly CAN Combination meter assembly
      Depress the brake pedal to continue Brake Hold display Prolonged control completion alert signal Skid control ECU assembly CAN Combination meter assembly
      Close the door to continue Brake Hold display Door open control completion alert signal Skid control ECU assembly CAN Combination meter assembly
      Fasten the seat belt to continue Brake Hold display Seat belt unbuckled control completion alert signal Skid control ECU assembly CAN Combination meter assembly
      Warming Up Maximum Vehicle Speed: 65MPH display*8 Shift range fixed in Low (when temperature is low) signal Power management control ECU CAN Combination meter assembly
      Warming Up Maximum Vehicle Speed: 110km/h display*9 Shift range fixed in Low (when temperature is low) signal Power management control ECU CAN Combination meter assembly
      High oil temperature Power limited display High oil temperature Power limited display Power management control ECU CAN Combination meter assembly
      Hybrid System Overheat display Hybrid system overheat Power management control ECU CAN Combination meter assembly
      Cooling performance of the hybrid battery is low Consult a dealer display Cooling performance of the hybrid battery is low consult a dealer display Power management control ECU CAN Combination meter assembly
      Check Headlight System display*1 Check Headlight System display Main body ECU CAN Combination meter assembly
      EV mode currently not available display EV reject Power management control ECU CAN Combination meter assembly
      EV mode not available Warming up display EV reject (warming up) Power management control ECU CAN Combination meter assembly
      EV mode currently not available Low battery display EV reject (low battery) Power management control ECU CAN Combination meter assembly
      EV mode currently not available Excessive speed display EV reject (excessive speed) Power management control ECU CAN Combination meter assembly
      EV mode currently not available Excessive acceleration display EV reject (excessive acceleration) Power management control ECU CAN Combination meter assembly
      EV mode deactivated display EV deactivated Power management control ECU CAN Combination meter assembly
      EV mode deactivated Low battery display EV deactivated (low battery) Power management control ECU CAN Combination meter assembly
      EV mode deactivated Excessive speed display EV deactivated (excessive speed) Power management control ECU CAN Combination meter assembly
      EV mode deactivated Excessive acceleration display EV deactivated (excessive acceleration) Power management control ECU CAN Combination meter assembly
      • *1: for LED Headlight
      • *2: w/ Lane-keeping Assist System
      • *3: w/ Dynamic Radar Cruise Control System
      • *4: w/ Pre-collision System
      • *5: w/ Intuitive Parking Assist System
      • *6: w/ Blind Spot Monitor System
      • *7: w/ Sliding Roof
      • *8: for U.S.A.
      • *9: for Canada
      • *10: w/ Variable Gear Ratio Steering System
    4. Buzzer
      Buzzer Communication Signal Sender Communication Line Receiver
      Smart key warning buzzer Power switch Certification ECU (Smart key ECU assembly) CAN Combination meter assembly
      Engine immobilizer certification buzzer Certification complete Certification ECU (Smart key ECU assembly) CAN Combination meter assembly
      Dynamic radar cruise control low speed cancel buzzer*1 Dynamic radar cruise control low speed cancel buzzer Power management control ECU CAN Combination meter assembly
      Seat belt warning buzzer Driver side seat belt buckle switch Center airbag sensor assembly CAN Combination meter assembly
      Front passenger side seat belt buckle switch
      Shift position P signal Power management control ECU
      Shift position R signal
      Vehicle speed Skid control ECU assembly
      VSC buzzer VSC buzzer Skid control ECU assembly CAN Combination meter assembly
      PKB-ON driving warning buzzer Parking brake switch Main body ECU CAN Combination meter assembly
      Vehicle speed Skid control ECU assembly CAN
      Driving with any door opened warning buzzer Vehicle speed Skid control ECU assembly CAN Combination meter assembly
      Each door courtesy switch Main body ECU
      Sports shift reject buzzer Sports shift reject buzzer Power management control ECU CAN Combination meter assembly
      EPS buzzer EPS buzzer Power steering ECU assembly CAN Combination meter assembly
      LKA buzzer*2 LKA buzzer Driving support ECU assembly CAN Combination meter assembly
      Brake force reduction warning buzzer Brake force reduction warning buzzer Skid control ECU assembly CAN Combination meter assembly
      READY buzzer READY buzzer Power management control ECU CAN Combination meter assembly
      Shift selection P request buzzer Shift selection P request buzzer Power management control ECU CAN Combination meter assembly
      Brake hold control unreleased warning buzzer Brake hold control unreleased warning buzzer Skid control ECU assembly CAN Combination meter assembly
      Hybrid battery charge request buzzer Hybrid battery charge request buzzer Power management control ECU CAN Combination meter assembly
      EV reject buzzer EV reject buzzer Power management control ECU CAN Combination meter assembly
      • *1: w/ Dynamic Radar Cruise Control System
      • *2: w/ Lane-keeping Assist System
    5. Others
      Signal Communication Signal Sender Communication Line Receiver
      Eco light Ecology light indicator status Power management control ECU CAN Combination meter assembly
      Eco-zone indicator level
      Eco mode indicator
      Integrated sports mode indicator
      Integrated sports mode signal
      Meter illumination Illumination level Trip switch Direct line Combination meter assembly
      Auto dimmer Main body ECU CAN
      Multi-information display change DISP switch Steering pad switch assembly Direct line Combination meter assembly
      Shift position indicator Shift position Power management control ECU CAN Combination meter assembly
      Mode indicator
      Transmission fluid temperature
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