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System Diagram

Fig 1: Meter And Gauge System Diagram
G05320763Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Input and output signals of the combination meter assembly: 

COMMUNICATION SIGNAL REFERENCE

Sender Receiver Communication Signal Communication Line
Combination Meter Power Source Control ECU Light control rheostat position signal Direct Line
Combination Meter
  • Gateway ECU
  • ECM
Vehicle specification signal
  • BEAN (Steering Column & Door Bus)
  • CAN-BEAN
Combination Meter
  • Gateway ECU
  • AFS ECU ((1))
  • Clearance Sonar ECU ((2))
  • Main Body ECU RH (Cowl Side J/B RH)
  • ABS & Traction Actuator Assembly
Satellite switch signal
  • BEAN (Instrument Panel Bus)
  • BEAN (Steering Column & Door Bus)
  • CAN-BEAN
Combination Meter
  • Center Airbag Sensor Assembly
  • ECM
  • Sliding Roof Control ECU ((3))
  • Certification ECU
  • Seat Belt Control ECU
  • Tilt and Telescopic ECU ((4))
  • Power Source Control ECU
  • Main Body ECU LH/ RH (Cowl Side J/B LH/ RH)
  • A/C Control Amplifier
  • AFS ECU ((1))
  • Tire Pressure Warning ECU
  • Clearance Sonar ECU ((2))
Vehicle speed signal
  • BEAN (Instrument Panel Bus)
  • BEAN (Steering Column & Door Bus)
  • CAN-BEAN
A/C Control Amplifier Combination Meter Outside temperature signal BEAN (Instrument Panel Bus)
Clearance Sonar ECU ((2)) Combination Meter
  • Clearance sonar indicator light signal
  • Area signals (FR/FL/RR/RL/Rear center)
BEAN (Instrument Panel Bus)
Tire Pressure Warning ECU Combination Meter Tire Pressure warning signal BEAN (Instrument Panel Bus)
AFS ECU((1)) Combination Meter
  • AFS OFF indicator light signal
  • AFS warning signal
BEAN (Instrument Panel Bus)
Main Body ECU RH (Cowl Side J/B RH) Combination Meter
  • Front passenger door courtesy light switch signal
  • Door lock detection switch signal
BEAN (Steering Column & Door Bus)
Sliding Roof Control ECU ((3)) Combination Meter Sliding roof signal BEAN (Steering Column & Door Bus)
Power Source Control ECU Combination Meter Charge indicator light signal BEAN (Steering Column & Door Bus)
ECM Combination Meter
  • Fuel injection signal
  • Engine coolant temperature signal
  • A/T gear position signal
  • A/T shift position signal
  • Diagnosis signal
  • Dynamic radar cruise control signal ((5))
  • Check engine indicator light signal
  • Vehicle specification signal
CAN
  • Engine revolution signal
  • Check engine indicator light signal
Direct Line
ABS & Traction Actuator Assembly ((6))/Skid Control ECU ((7)) Combination Meter VSC/SLIP/ABS/BRAKE indicator light signal CAN-BEAN
Vehicle speed signal Direct Line
Seat Belt Control ECU Combination Meter PCS indicator light signal ((8)) CAN-BEAN
4WD Control ECU ((9)) Combination Meter 4WD system condition signal CAN-BEAN
Electronic Power Steering ECU Combination Meter EPS warning light signal CAN-BEAN
Center Airbag Sensor Assembly Combination Meter Airbag indicator light signal CAN-BEAN
Satellite Switch Combination Meter To select the modes for multi-display listed below.
  • Clearance Sonar ((2))
  • Tire pressure warning ((5))
  • AFS ((1))
  • Pre-collision ((8))
  • Speed/Tacho indicator signal
Direct Line
Steering Pad Switch (DISP) Combination Meter Multi-display operation signal Direct Line
Fuel Sender Gauge Assembly (Main/Sub) Combination Meter Fuel level signal Direct Line
Turn Signal Flasher Combination Meter Turn signal LH/RH signal Direct Line
Light Control Rheostat Combination Meter
  • Illumination signal
  • Tail cancel signal
Direct Line
Brake Fluid Level Warning Switch Combination Meter Brake fluid level signal Direct Line
Combination Meter Tire Pressure Warning ECU ((5)) Tire pressure Initial/Select signal Direct Line
Combination Meter Integration Control & Panel Assembly ((10))/Multi-display ((11)) Passenger seat belt warning light signal Direct Line
(1) with Intelligent AFS
(2) with Clearance Sonar System
(3) with Sliding Roof
(4) with Power Tilt & Power Telescopic
(5) with Dynamic Radar Cruise Control System
(6) without VDIM
(7) with VDIM
(8) with Pre-collision System
(9) for 4WD
(10) without Navigation System
(11) with Navigation System