Lexus IS250 · Service Manual BODY ELECTRICAL

SYSTEM DIAGRAM

System information

E123305E01
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
  1. Gateway ECU
  2. ECM
 Vehicle specification signal
  1. BEAN (Steering Column & Door Bus)
  2. CAN-BEAN
Combination Meter
  1. Gateway ECU
  2. AFS ECU (*1)
  3. Clearance Sonar ECU (*2)
  4. Main Body ECU RH (Cowl Side J/B RH)
  5. ABS & Traction Actuator Assembly
 Satellite switch signal
  1. BEAN (Instrument Panel Bus)
  2. BEAN (Steering Column & Door Bus)
  3. CAN-BEAN
Combination Meter
  1. Center Airbag Sensor Assembly
  2. ECM
  3. Sliding Roof Control ECU (*3)
  4. Certification ECU
  5. Seat Belt Control ECU
  6. Tilt and Telescopic ECU (*4)
  7. Power Source Control ECU
  8. Main Body ECU LH/RH (Cowl Side J/B LH/RH)
  9. A/C Control Amplifier
  10. AFS ECU (*1)
  11. Clearance Sonar ECU (*2)
 Vehicle speed signal
  1. BEAN (Instrument Panel Bus)
  2. BEAN (Steering Column & Door Bus)
  3. CAN-BEAN
A/C Control Amplifier
 Combination Meter
 Outside temperature signal
 BEAN (Instrument Panel Bus)
Clearance Sonar ECU (*2)
 Combination Meter
  1. Clearance sonar indicator light signal
  2. Area signals (FR/FL/RR/RL/Rear center)
 BEAN (Instrument Panel Bus)
AFS ECU (*1)
 Combination Meter
  1. AFS OFF indicator light signal
  2. AFS warning signal
 BEAN (Instrument Panel Bus)
Main Body ECU RH (Cowl Side J/B RH)
 Combination Meter
  1. Front passenger door courtesy light switch signal
  2. 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
  1. Fuel injection signal
  2. Engine coolant temperature signal
  3. A/T gear position signal
  4. A/T shift position signal
  5. Diagnosis signal
  6. Dynamic radar cruise control signal (*5)
  7. Check engine indicator light signal
  8. Vehicle specification signal
 CAN-BEAN
  1. Engine revolution signal
  1. Check engine indicator light signal
 Direct Line
ABS & Traction Actuator Assembly
 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 (*6)
 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
  1. To select the modes for multi-display listed below.
    1. Clearance Sonar (*2)
    2. Intrusion Sensor (*7)
    3. AFS (*1)
    4. Pre-crash safety (*6)
    5. 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
  1. Illumination signal
  2. Tail cancel signal
 Direct Line
Brake Fluid Level Warning Switch
 Combination Meter
 Brake fluid level signal
 Direct Line
Combination Meter
 Integration Control & Panel Assembly (*8)/Multi-display (*9)
 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: with Pre-crash Safety System
*7: with Intrusion Sensor
*8: without Navigation System
*9: with Navigation System
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