System Diagram

CAN signal

Fig 1: CAN Signal Communication Diagram
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Direct line signal

Fig 2: Direct Line Signal Communication Diagram
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Input and output signals of the combination meter assembly

Communication Signal	Sender	Receiver	Communication Line
MIL (Check engine warning light) signal	ECM	Combination Meter Assembly	Direct Line
Starter signal			CAN (CAN No. 1 Bus)
Test mode signal
Tachometer signal
Engine coolant temperature signal
Fuel injection volume signal
Cruise indicator light signal
Cruise control warning signal
Reverse buzzer request signal
Sports shift reject buzzer request signal
A/T shift position signal
A/T fluid temperature signal
Snow indicator light signal
Reject buzzer signal
Engine type information signal
Vehicle speed signal	Skid Control ECU	Combination Meter Assembly	Direct Line/CAN (CAN No. 1 Bus)
ABS warning light signal			CAN (CAN No. 1 Bus)
Brake warning light signal
Slip indicator light signal
Slip off indicator light signal
VSC off indicator light signal (*1)
Downhill assist control indicator light signal (*2)
Parking brake signal
Illuminance data	Main Body ECU	Combination Meter Assembly	CAN (CAN No. 1 Bus)
Auto dimmer signal
ACC switch signal
Key switch signal
Each door courtesy switch signal
Smart key signal (*3)
Driver side seat belt buckle switch signal
Seat belt warning buzzer signal
Parking brake switch signal
High beam indicator light signal
Head (4)/Tail (5) indicator light signal
Wireless buzzer signal
Sliding roof signal (*6)
Sliding roof warning buzzer request signal (*6)
Smart key warning buzzer request signal (*3)
Light reminder buzzer request signal
Front fog indicator light signal
Glass hatch courtesy switch signal (*7)
Front passenger side seat belt buckle switch signal	Center Airbag Sensor Assembly	Combination Meter Assembly	CAN (CAN No. 1 Bus)
SRS warning light signal
Front passenger side seat condition signal
Diagnosis information signal	Center Airbag Sensor Assembly	Combination Meter Assembly	CAN (CAN No. 1 Bus)
	ECM
	Skid Control ECU
	Power Steering ECU
Outside temperature signal	Air Conditioning Amplifier	Combination Meter Assembly	CAN (CAN No. 1 Bus)
EPS warning light signal	Power Steering ECU	Combination Meter Assembly	CAN (CAN No. 1 Bus)
Steering lock warning signal (*3)	Steering Lock ECU	Combination Meter Assembly	CAN (CAN MS Bus)
Tire pressure signal (*8)	Tire Pressure Warning ECU	Combination Meter Assembly	Direct Line
Vehicle speed signal	Combination Meter Assembly	Air Conditioning Amplifier	CAN (CAN No. 1 Bus)
		ECM
		Power Steering ECU
		Center Airbag Sensor Assembly
		Main Body ECU (*3)
		Sliding Roof Control ECU (*4)
		Steering Lock ECU (*3)	CAN (CAN MS Bus)
		Power Back Door ECU (*9)
		Certification ECU (*3)
		ECM	Direct Line
		Radio Receiver Assembly (*13)
		Navigation Receiver Assembly (*10)
		Radio and Display Receiver Assembly (*14)
		Main Body ECU (*3)
		Tire Pressure Warning ECU (*8)
		TCM (*12)
		Stereo Component Amplifier Assembly (*15)
Illuminance data	Combination Meter Assembly	Main Body ECU	CAN (CAN No. 1 Bus)
Illuminance data	Combination Meter Assembly	Air Conditioning Amplifier	CAN (CAN No. 1 Bus)
Tail cancel signal	Combination Meter Assembly	Main Body ECU	CAN (CAN No. 1 Bus)
Tail cancel signal	Combination Meter Assembly	Air Conditioning Amplifier	CAN (CAN No. 1 Bus)
Vehicle specification signal	Combination Meter Assembly	Air Conditioning Amplifier	CAN (CAN No. 1 Bus)
Vehicle specification signal	Combination Meter Assembly	Steering Lock ECU (*3)	CAN (CAN No. 1 Bus)
Fuel level signal	Fuel Sender Gauge Assembly	Combination Meter Assembly	Direct Line
Turn indicator light signal	Turn Signal Flasher	Combination Meter Assembly	Direct Line
Illumination signal	Light Control Rheostat	Combination Meter Assembly	Direct Line
Tail cancel signal	Light Control Rheostat	Combination Meter Assembly	Direct Line
DISP switch signal	Steering Pad Switch	Combination Meter Assembly	Direct Line
Brake fluid level signal	Brake Fluid Level Warning Switch	Combination Meter Assembly	Direct Line
Charge warning light signal	Generator	Combination Meter Assembly	Direct Line
Oil pressure warning light signal	Oil Pressure Switch	Combination Meter Assembly	Direct Line
Washer level warning light signal	Washer Level Warning Switch	Combination Meter Assembly	Direct Line
Tire pressure warning light signal (*8)	Tire Pressure Warning ECU	Combination Meter Assembly	Direct Line
Multi-information display signal (*11)	Combination Meter Assembly	Clock Assembly	Direct Line
Front passenger side seat belt warning light signal	Combination Meter Assembly	Hazard Warning Switch	Direct Line

*1: When the combination meter assembly receives a VSC off indicator light signal, the combination meter assembly controls a slip off indicator light

*2: for 4WD

*3: w/ Smart Key System

*4: for U.S.A.

*5: except U.S.A.

*6: w/ Sliding Roof

*7: w/ Glass Hatch Opener System

*8: w/ Tire Pressure Warning System

*9: w/ Power Back Door System

*10: for Navigation Receiver Type

*11: w/ Multi-information Display

*12: for 1AR-FE

*13: for Radio Receiver Type

*14: for Radio and Display Type

*15: w/ Back Door Speaker