METER / GAUGE SYSTEM > SYSTEM DESCRIPTION

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1. Meter or Gauge
   
   

   Meter or Gauge	Communication Signal	Receiver	Communication Line	Sender
   Speedometer	Vehicle speed	Combination Meter Assembly	CAN	Skid control ECU assembly
   Tachometer	HV engine speed	Combination Meter Assembly	CAN	Power management control ECU
   	Shift D selection
   	Eco mode indicator
   	Shift gear selection
   	Sport mode off
   Fuel receiver gauge	Fuel level	Combination Meter Assembly	Direct Line	Fuel sender gauge assembly
   	Fuel level	Navigation receiver assembly (for HDD)	CAN	Combination meter assembly
   	Fuel level warning
   ODO, TRIP A, TRIP B meter	ODO/TRIP change	Combination Meter Assembly	-	ODO/TRIP change switch knob
   	Vehicle speed	Combination Meter Assembly	CAN	Skid control ECU assembly
   Meter illumination	Illumination level	Combination meter assembly	Direct Line	Light control rheostat
   	Tail cancel
   	Auto dimmer		CAN	Main body ECU (Multiplex network body ECU)
   	Tail cancel	Main body ECU (Multiplex network body ECU)	CAN	Combination meter assembly
   HV system indicator	Eco zone indicator level	Combination meter assembly	CAN	Power management control ECU
   	Shift D selection
   	Eco mode indicator
   	Shift gear selection
   	Sport mode

2. Warning or Indicator
   
   

   Warning or Indicator	Communication Signal	Receiver	Communication Line	Sender
   Master warning	Each system warning	Combination meter assembly	CAN, Direct Line	Related ECUs
   Open door warning	Each door courtesy switch	Combination meter assembly	CAN	Main body ECU (Multiplex network body ECU)
   	Hood courtesy switch	Combination meter assembly
   	Luggage door courtesy switch	Combination meter assembly
   Brake warning	Brake warning	Combination meter assembly	CAN	Skid control ECU assembly
   	Parking brake switch			Main body ECU (Multiplex network body ECU)
   Seat belt warning	Driver side seat belt buckle switch	Combination meter assembly	CAN	Main body ECU (Multiplex network body ECU)
   	Front passenger side seat belt buckle switch	Combination meter assembly	Direct Line	Front seat inner belt assembly RH (for LHD) or LH (for RHD)
   	Front passenger seat condition	Combination meter assembly	Direct Line	Separate type front seat cushion pad
   	Parking brake switch	Combination meter assembly	CAN	Main body ECU (Multiplex network body ECU)
   SRS warning	SRS warning	Combination meter assembly	CAN	Airbag ECU assembly
   Water temperature warning	Water temperature	Combination meter assembly	CAN	ECM
   	Engine coolant temperature sensor existence			A/C amplifier assembly
   	Water temperature		Direct Line	Engine coolant temperature sensor
   Oil pressure warning	Oil pressure	Combination meter assembly	Direct Line	Oil pressure switch
   	Oil pressure warning lighting prohibition		CAN	Power management control ECU
   Charge warning	Charge warning	Combination meter assembly	CAN	Power management control ECU
   EPS warning	EPS warning	Combination meter assembly	CAN	Power steering ECU assembly
   MIL (Check engine warning)	MIL (Check engine warning)	Combination meter assembly	Direct Line	ECM
   PCS warning (w/ Pre-crash Safety System)	PCS system warning	Combination meter assembly	CAN	Seat belt control ECU
   	Dirty of radar sensor
   	PCS not available now
   	Bulb check
   	PCS warning
   	Pre-crash seat belt communication invalidation (w/ Pre-crash Brake)
   	Pre-crash seat belt off switch (w/ Pre-crash Brake)
   Slip indicator	Slip indicator	Combination meter assembly	CAN	Skid control ECU assembly
   ABS warning	ABS warning	Combination meter assembly	CAN	Skid control ECU assembly
   Electrically controlled brake warning	Brake warning (Yellow)	Combination meter assembly	CAN	Skid control ECU assembly
   Fuel level warning	Fuel level	Combination meter assembly	Direct Line	Fuel sender gauge assembly
   Rear fog indicator	Rear fog indicator	Combination meter assembly	CAN	Main body ECU (Multiplex network body ECU)
   Headlight leveling indicator (w/ Automatic Type Headlight Beam Level Control)	Headlight leveling indicator	Combination meter assembly	Direct Line	Headlight leveling ECU assembly
   High beam indicator	High beam indicator	Combination meter assembly	CAN	Main body ECU (Multiplex network body ECU)
   Ready indicator	Ready indicator	Combination meter assembly	CAN	Power management control ECU
   	STA signal
   Tail indicator	Tail indicator	Combination meter assembly	CAN	Main body ECU (Multiplex network body ECU)
   Front fog indicator	Front fog light	Combination meter assembly	CAN	Main body ECU (Multiplex network body ECU)
   Turn indicator	Turn indicator	Combination meter assembly	Direct Line	Turn signal flasher assembly
   Sport mode indicator	Sport mode indicator	Combination meter assembly	CAN	Power management control ECU
   Eco mode indicator	Eco mode indicator	Combination meter assembly	CAN	Power management control ECU
   EV indicator light	Eco mode indicator	Combination meter assembly	CAN	Power management control ECU
   	Engine mode
   	Vehicle speed	Combination meter assembly		Skid control ECU assembly
   	EV indicator customization signal	Combination meter assembly	Direct Line	DISP switch (Steering pad switch assembly)
   Cruise main (Constant speed control mode) indicator	Cruise main (Constant speed control mode) indicator	Combination meter assembly	CAN	Driving support ECU assembly
   Cruise main (Vehicle-to-vehicle distance control mode) indicator (w/ Dynamic Radar Cruise Control System)	Cruise main (Vehicle-to-vehicle distance control mode) indicator	Combination meter assembly	CAN	Driving support ECU assembly
   Clearance sonar indicator (w/ Lexus Parking Assist-sensor System)	Clearance sonar indicator	Combination meter assembly	CAN	Clearance Warning ECU
   EV mode indicator	EV mode indicator	Combination meter assembly	CAN	Power management control ECU
   Shift selection indicator	Shift selection	Combination meter assembly	CAN	Power management control ECU

3. Cruise Information Display
   
   

   Cruise Information Display	Communication Signal	Receiver	Communication Line	Sender
   Cruise information display	DISP switch (steering pad switch assembly) operation	Combination meter assembly	Direct line	DISP switch (Steering pad switch assembly)
   Energy flow display	Energy flow	Combination meter assembly	CAN	Power management control ECU
   Current fuel consumption display	Fuel consumption	Combination meter assembly	CAN	ECM
   	Vehicle speed	Combination meter assembly	CAN	Skid control ECU assembly
   			Direct line
   Average fuel consumption display	Fuel consumption	Combination meter assembly	CAN	ECM
   	Vehicle speed	Combination meter assembly	CAN	Skid control ECU assembly
   			Direct line
   	Reset	Combination meter assembly	Direct Line	DISP switch (Steering pad switch assembly)
   Average fuel consumption after refueling display	Fuel consumption	Combination meter assembly	CAN	ECM
   	HV engine speed	Combination meter assembly	CAN	Power management control ECU
   	Vehicle speed	Combination meter assembly	CAN	Skid control ECU assembly
   			Direct line
   	Reset	Combination meter assembly	CAN	DISP switch (Steering pad switch assembly)
   Driving distance display	Fuel consumption	Combination meter assembly	CAN	ECM
   	Fuel level	Combination meter assembly	Direct Line	Fuel sender gauge assembly
   Driving time display	Driving time	-	-	-
   Average speed display	Vehicle speed	Combination meter assembly	CAN	Skid control ECU assembly
   	Reset	Combination meter assembly	Direct Line	DISP switch (Steering pad switch assembly)
   Outside temperature	Outside temperature	Combination meter assembly	CAN	Air conditioning amplifier assembly
   Rear seat belt warning display (w/ Rear Seat Belt Warning)	Rear seat belt buckle switch RH	Combination meter assembly	Direct Line	Rear seat inner belt assembly RH
   	Rear seat belt buckle switch center			Rear seat inner with center belt assembly LH
   	Rear seat belt buckle switch LH
   	Rear door RH courtesy switch		CAN	Main body ECU (Multiplex network body ECU)
   	Rear door LH courtesy switch		CAN
   Customized parameter display	Customized parameter	Combination meter assembly	CAN	Related ECUs

4. Multi-information Display
   
   

   Multi-information Display Message	Communication Signal	Receiver	Communication Line	Sender
   Multi-information display	DISP switch (steering pad switch assembly) operation	Combination meter assembly	Direct Line	DISP switch (Steering pad switch assembly)
   Maintenance mode display	Maintenance mode display	Combination meter assembly	CAN	Power management control ECU
   Certification mode display	Certification mode display	Combination meter assembly	CAN	Power management control ECU
   Adjusting front radar beam display (w/ Dynamic Radar Cruise Control System)	Adjusting front radar beam display	Combination meter assembly	CAN	Driving support ECU assembly
   Checking cruise control C/D display (w/ Dynamic Radar Cruise Control System)	Checking cruise control C/D display	Combination meter assembly	CAN	Driving support ECU assembly
   Checking cruise control brake display	Checking cruise control brake display	Combination meter assembly	CAN	Driving support ECU assembly
   Brake! display (w/ Dynamic Radar Cruise Control System)	Brake! display	Combination meter assembly	CAN	Driving support ECU assembly
   Open door warning	Open door warning	Combination meter assembly	CAN	Main body ECU (Multiplex network body ECU)
   Clearance sonar display (w/ Lexus Parking Assist-sensor System)	Clearance sonar display	Combination meter assembly	CAN	Clearance warning ECU assembly
   Check sonar display (w/ Lexus Parking Assist-sensor System)	Check sonar display	Combination meter assembly	CAN	Clearance warning ECU assembly
   Clean sonar display (w/ Lexus Parking Assist-sensor System)	Clean sonar display	Combination meter assembly	CAN	Clearance warning ECU assembly
   Auto power off to conserve battery display	Auto power off to conserve battery	Combination meter assembly	CAN	Power management control ECU
   Shift to P position display	Shift to P position display	Combination meter assembly	CAN	Power management control ECU
   Rear seat belt reminder display (w/ Rear Seat Belt Warning)	Rear seat belt buckle switch RH	Combination meter assembly	Direct Line	Rear seat inner belt assembly RH
   	Rear seat belt buckle switch center			Rear seat inner with center belt assembly LH
   	Rear seat belt buckle switch LH
   Shift to P position when parked display	Shift to P position when parked display	Combination meter assembly	CAN	Certification ECU (Smart key ECU assembly)
   Shift to P position and push power switch to turn power off display	Shift to P position and push power switch to turn power off display	Combination meter assembly	CAN	Power management control ECU
   N position display	N position display	Combination meter assembly	CAN	Certification ECU (Smart key ECU assembly)
   Traction battery preservation mode restart after shifting the N position display	Traction battery preservation mode restart after shifting the N position	Combination meter assembly	CAN	Power management control ECU
   Low traction battery charge when not in N position display	Low traction battery charge when not in N position display	Combination meter assembly	CAN	Power management control ECU
   P lock malfunction when parking, park in flat place and apply parking brake securely display	P lock malfunction when parking, park in flat place and apply parking brake securely display	Combination meter assembly	CAN	Power management control ECU
   Check hybrid system display	Check hybrid system display	Combination meter assembly	CAN	Power management control ECU
   Release parking brake display	Release parking brake display	Combination meter assembly	CAN	Main body ECU (Multiplex network body ECU)
   Key not detected display	Key not detected display	Combination meter assembly	CAN	Certification ECU (Smart key ECU assembly)
   Speed limit exceeded display (for G.C.C. Countries)	Vehicle speed	Combination meter assembly	CAN	Skid control ECU assembly
   Clean radar sensor display (w/ Pre-crash Safety System)	Clean radar sensor display	Combination meter assembly	CAN	Seat belt control ECU
   Cruise control not available display (w/ Dynamic Radar Cruise Control System)	Cruise control not available display	Combination meter assembly	CAN	Driving support ECU assembly
   Check cruise control system display (w/ Dynamic Radar Cruise Control System)	Check cruise control system display	Combination meter assembly	CAN	Driving support ECU assembly
   Check PCS system display (w/ Pre-crash Safety System)	Check PCS system display	Combination meter assembly	CAN	Seat belt control ECU
   Check headlight system display (w/ Automatic Type Headlight Beam Level Control)	Check headlight system display	Combination meter assembly	CAN	Main body ECU (Multiplex network body ECU)
   Turn power off display	Turn power off display	Combination meter assembly	CAN	Power management control ECU
   Key detected in vehicle display	Key detected in vehicle display	Combination meter assembly	CAN	Certification ECU (Smart key ECU assembly)
   Turn lights off display (w/ Light Reminder)	Turn lights off display	Combination meter assembly	CAN	Main body ECU (Multiplex network body ECU)
   Moon roof opened display (w/ Sliding Roof)	Moon roof opened display	Combination meter assembly	CAN	Main body ECU (Multiplex network body ECU)
   Depress brake pedal, touch power switch with key display	Depress brake pedal, touch power switch with key	Combination meter assembly	CAN	Certification ECU (Smart key ECU assembly)
   Depress brake and push power switch to start display	Depress brake and push power switch to start	Combination meter assembly	CAN	Certification ECU (Smart key ECU assembly)
   Shift to P position to start display	Shift to P position to start	Combination meter assembly	CAN	Power management control ECU
   Key battery low display	Shift to P position to start	Combination meter assembly	CAN	Power management control ECU
   Hybrid system overheat display	Hybrid system overheat display	Combination meter assembly	CAN	Power management control ECU
   Low washer fluid display	Low washer fluid display	Combination meter assembly	Direct Line	Washer fluid level warning switch
   PCS temporarily not available display (w/ Pre-crash Safety System)	PCS temporarily not available display	Combination meter assembly	CAN	Seat belt control ECU
   EV mode currently not available display	EV mode currently not available display	Combination meter assembly	CAN	Power management control ECU
   EV mode currently not available warming up display	EV mode currently not available warming up display	Combination meter assembly	CAN	Power management control ECU
   EV mode currently not available low battery display	EV mode currently not available low battery display	Combination meter assembly	CAN	Power management control ECU
   EV mode currently not available excessive speed display	EV mode currently not available excessive speed display	Combination meter assembly	CAN	Power management control ECU
   EV mode currently not available excessive acceleration display	EV mode currently not available excessive speed display	Combination meter assembly	CAN	Power management control ECU
   EV mode deactivated display	EV mode deactivated display	Combination meter assembly	CAN	Power management control ECU
   EV mode deactivated low battery display	EV mode deactivated low battery display	Combination meter assembly	CAN	Power management control ECU
   EV mode deactivated excessive speed display	EV mode deactivated excessive speed display	Combination meter assembly	CAN	Power management control ECU
   EV mode deactivated excessive acceleration display	EV mode deactivated excessive acceleration display	Combination meter assembly	CAN	Power management control ECU
   Theft sensor off display (w/ Intrusion Sensor)	Theft sensor off display	Combination meter assembly	CAN	Main body ECU (Multiplex network body ECU)
   Theft sensor on display (w/ Intrusion Sensor)	Theft sensor on display	Combination meter assembly	CAN	Main body ECU (Multiplex network body ECU)

5. Buzzer
   
   

   Buzzer	Communication Signal	Receiver	Communication Line	Sender
   Ready buzzer	Ready buzzer	Combination meter assembly	CAN	Power management control ECU
   Seat belt warning buzzer	Driver side seat belt buckle switch	Combination meter assembly	CAN	Main body ECU (Multiplex network body ECU)
   	Front passenger side seat belt buckle switch		Direct Line	Front seat inner belt assembly RH (for LHD) or LH (for RHD)
   	Front passenger seat condition		Direct Line	Separate type front seat cushion pad
   	Shift selection R		CAN	Power management control ECU
   	Shift selection P
   	Rear RH door courtesy switch (w/ Rear Seat Belt Warning)		CAN	Main body ECU (Multiplex network body ECU)
   	Rear LH door courtesy switch (w/ Rear Seat Belt Warning)
   	Rear seat belt buckle switch RH (w/ Rear Seat Belt Warning)		Direct Line	Rear seat inner belt assembly RH
   	Rear seat belt buckle switch center (w/ Rear Seat Belt Warning)			Rear seat inner with center belt assembly LH
   	Rear seat belt buckle switch LH (w/ Rear Seat Belt Warning)
   	Parking brake switch		CAN	Main body ECU (Multiplex network body ECU)
   EPS warning buzzer	EPS warning	Combination meter assembly	CAN	Power steering ECU assembly
   Entry and start system warning buzzer (Intermittent)	Entry and start system warning buzzer (Continual)	Combination meter assembly	CAN	Certification ECU (Smart key ECU assembly)
   Immobiliser key identification completion	Immobiliser key identification completion	Combination meter assembly	CAN	Certification ECU (Smart key ECU assembly)
   Master warning buzzer	Master warning buzzer	Combination meter assembly	CAN	Related ECUs
   Dynamic radar cruise control low speed cancel (w/ Dynamic Radar Cruise Control System)	Dynamic radar cruise control low speed cancel	Combination meter assembly	CAN	Driving support ECU assembly
   Entry and start system warning buzzer (Single)	Entry and start system warning buzzer (Single)	Combination meter assembly	CAN	Certification ECU (Smart key ECU assembly)
   	Emergency key operation
   Brake control system warning buzzer	Brake control system warning buzzer	Combination meter assembly	CAN	Skid control ECU assembly
   Entry and start system warning buzzer (Continual)	Entry and start system warning buzzer (Continual)	Combination meter assembly	CAN	Certification ECU (Smart key ECU assembly)
   Shift selection P request buzzer	Shift selection P request buzzer	Combination meter assembly	CAN	Power management control ECU
   HV battery charge request buzzer	HV battery charge request buzzer	Combination meter assembly	CAN	Power management control ECU
   Speed limit exceeded warning buzzer (for G.C.C. Countries)	Vehicle speed	Combination meter assembly	CAN	Skid control ECU assembly
   Driving with parking brake unreleased warning buzzer	Parking brake switch	Combination meter assembly	CAN	Main body ECU (Multiplex network body ECU)
   	Vehicle speed		CAN	Skid control ECU assembly
   Driving with any door opened warning buzzer	Door courtesy switch	Combination meter assembly	CAN	Main body ECU (Multiplex network body ECU)
   	Vehicle speed		CAN	Skid control ECU assembly
   Sports shift reject buzzer	Sports shift reject buzzer	Combination meter assembly	CAN	Power management control ECU
   Shift operation reject buzzer	Shift operation reject buzzer	Combination meter assembly	CAN	Power management control ECU
   EV reject buzzer	EV reject buzzer	Combination meter assembly	CAN	Power management control ECU
   Light reminder buzzer (w/ Light Reminder)	Tail indicator	Combination meter assembly	CAN	Main body ECU (Multiplex network body ECU)
   	Driver side door courtesy switch
   Sliding roof warning buzzer (w/ Sliding Roof)	Sliding roof warning	Combination meter assembly	CAN	Main body ECU (Multiplex network body ECU)
   Depress the accelerator pedal with shift selection N buzzer	Shift selection N	Combination meter assembly	CAN	Power management control ECU

6. Others
   
   

   Signal	Communication Signal	Receiver	Communication Line	Sender
   Vehicle speed	Vehicle speed	Combination meter assembly	CAN	Skid control ECU assembly
   		Related ECUs	CAN	Combination meter assembly
   		Related ECUs	Direct Line	Combination meter assembly
   Rear seat belt condition (w/ Seat Heater)	Rear seat belt condition (for RH) signal	Combination meter assembly	Direct Line	Rear seat inner belt assembly RH
   	Rear seat belt condition (for center) signal			Rear seat inner with center belt assembly
   	Rear seat belt condition (for LH) signal
   ECO light (blue) or sport light (red)	ECO light (blue) or sport light (red)	-	-	-

1. Multi-information display flow chart
   

   
   
   
   
   
   
   
   
   

   Display shifting condition:

   
   

   No.	Display Shifting Condition
   *a	Display cycles between messages.
   *b	Conditions are not met and all new messages have been displayed.
   *c	If the power switch turned off, then on (IG) during the opening, then the opening display will be shown from the beginning.
   *d	Conditions are met and vehicle speed is less than 8 km/h (5 mph).
   *e	Conditions for displaying new messages other than the door open warning are met, or the vehicle speed is more than 8 km/h (5 mph).
   *f	Mode has completed and conditions for dynamic radar cruise display are met.
   *g	Up or down switch is not operated for more than 6 seconds.
   *h	The advisory display will be shown as the last of the normal displays.

1. Each warning display for combination meter assembly
   

   HINT:

   Illustrations may differ from the actual screen displayed depending on the specifications of the vehicle.

   
   
   
   

1. Check the illumination function of the warning or indicator lights listed below when turning the power switch on (IG).
   
   

   OK:

   
   

   Warning or Indicator Light	Specified Condition
   Water temperature, MIL (Check engine), Leveling*1, Master	Warning or indicator light comes on for about 3 seconds after turning the power switch on (IG).
   SRS	Warning light comes on for about 6 seconds after turning the power switch on (IG).
   Oil pressure, Charge, EPS, PCS*2	Indicator or warning light comes on when turning the power switch on (IG) before hybrid system starts.
   Brake, Slip, ABS, Electrically controlled brake	Indicator or warning light comes on when turning the power switch on (IG) before hybrid system starts.*3
   	Indicator or warning light comes on when turn the power switch off to on (READY) for 3 seconds, then goes off.

   1. *1: w/ Automatic Type Headlight Beam Level Control
      
   2. *2: w/ Pre-crash Safety System
      
   3. *3: When turning the power switch on (IG), if it takes 3 seconds or more for the READY indicator light to illuminate, the warning or indicator light turns off to right after the READY indicator light illuminates.