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Home >> Lexus >> 2012 >> IS 350 Base, RWD >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Meter & Gauge System (Diagnostics & Symptom Tests) >> Meter / Gauge System >> System Diagram >> System Diagram

System Diagram

Fig 1: Identifying Meter/Gauge System
GTY394010Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INPUT AND OUTPUT SIGNALS OF THE COMBINATION METER ASSEMBLY:

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
  • Clearance Sonar ECU (*1)
  • Main Body ECU RH (Cowl Side J/B RH)
  • Skid Control ECU
  • Driver Side Mirror ECU (*4)
  • Passenger Side Mirror ECU (*4)
 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 (*2)
  • Certification ECU
  • Seat Belt Control ECU
  • Tilt and Telescopic ECU (*3)
  • Power Source Control ECU
  • Main Body ECU LH/RH (Cowl Side J/B LH/RH)
  • A/C Control Amplifier
  • Tire Pressure Warning ECU
  • Clearance Sonar ECU (*1)
  • Driver Side Mirror ECU (*4)
  • Passenger Side Mirror ECU (*4)
 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 (*1) Combination Meter
  • Clearance sonar indicator light signal
  • Area signals (FR/FL/RR/RL/Rear center)
 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
  • DRL OFF indicator light signal (*8)
 BEAN (Steering Column & Door Bus)
Sliding Roof Control ECU (*2) 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
  • MIL (Check engine warning light) signal
  • Vehicle specification signal
 CAN
  • Engine revolution signal
  • Check engine indicator light signal
 Direct Line
Skid Control ECU Combination Meter VSC/SLIP/ABS/BRAKE/VSC OFF indicator light signal CAN-BEAN
TRAC OFF display signal
Vehicle speed signal Direct Line
4WD Control ECU (*5) Combination Meter AWD 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 (*1)
    • Speed/Tacho indicator signal
    • Auto mirror (*5)
 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 Integration Control & Panel Assembly (*6)/Display and Navigation Module Display (*7), (*9) Passenger seat belt warning light signal Direct Line
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