Lexus IS250 · Service Manual STEERING

SYSTEM DIAGRAM

System information

B124128E03
Input and output signals of each ECU: 
Transmitting ECU (transmitter)
 Receiving ECU
 Signals
 Communication Method
Power Source Control ECU
 Steering Lock ECU
 Power supply status (to steering lock motor)
 LIN
Steering Lock ECU
  1. Certification ECU
  2. Power Source Control ECU
  3. ID code box
 Sleep available status
 LIN
Steering Lock ECU
  1. Certification ECU
  2. Power Source Control ECU
  3. ID code box
 Lock / Unlock sensor status
 LIN
Steering Lock ECU
  1. Certification ECU
  2. Power Source Control ECU
  3. ID code box
 Steering lock status
 LIN
Steering Lock ECU
  1. Certification ECU
  2. Power Source Control ECU
  3. ID code box
 Motor control status
 LIN
Steering Lock ECU
  1. Certification ECU
  2. Power Source Control ECU
  3. ID code box
 Diagnostic response status
 LIN
Steering Lock ECU
  1. Certification ECU
  2. Power Source Control ECU
  3. ID code box
 Lock / Unlock sensor malfunction
 LIN
Steering Lock ECU
  1. Certification ECU
  2. Power Source Control ECU
  3. ID code box
 Power supply malfunction
(to steering lock motor)
 LIN
Steering Lock ECU
  1. Certification ECU
  2. Power Source Control ECU
  3. ID code box
 Motor driver malfunction
 LIN
Steering Lock ECU
  1. Certification ECU
  2. Power Source Control ECU
  3. ID code box
 Lock bar (stuck) status
 LIN
Steering Lock ECU
  1. Certification ECU
  2. Power Source Control ECU
  3. ID code box
 Push start status
 LIN
Steering Lock ECU
  1. Certification ECU
  2. Power Source Control ECU
  3. ID code box
 Lock / Unlock relay drive status
 LIN
Steering Lock ECU
  1. Certification ECU
  2. Power Source Control ECU
  3. ID code box
 Engine start control status
 LIN
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