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System Diagram

Fig 1: Steering Lock System Diagram
G05816593Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Input and output signals of each ECU 

SIGNALS REFERENCE

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
  • Certification ECU
  • Power source control ECU
  • ID code box
 Sleep available status LIN
Steering Lock ECU
  • Certification ECU
  • Power source control ECU
  • ID code box
 Lock/Unlock sensor status LIN
Steering Lock ECU
  • Certification ECU
  • Power source control ECU
  • ID code box
 Steering lock status LIN
Steering Lock ECU
  • Certification ECU
  • Power source control ECU
  • ID code box
 Motor control status LIN
Steering Lock ECU
  • Certification ECU
  • Power source control ECU
  • ID code box
 Diagnostic response status LIN
Steering Lock ECU
  • Certification ECU
  • Power source control ECU
  • ID code box
 Lock/Unlock sensor malfunction LIN
Steering Lock ECU
  • Certification ECU
  • Power source control ECU
  • ID code box
 Power supply malfunction (to steering lock motor) LIN
Steering Lock ECU
  • Certification ECU
  • Power source control ECU
  • ID code box
 Motor driver malfunction LIN
Steering Lock ECU
  • Certification ECU
  • Power source control ECU
  • ID code box
 Lock bar (stuck) status LIN
Steering Lock ECU
  • Certification ECU
  • Power source control ECU
  • ID code box
 Push start status LIN
Steering Lock ECU
  • Certification ECU
  • Power source control ECU
  • ID code box
 Lock/Unlock relay drive status LIN
Steering Lock ECU
  • Certification ECU
  • Power source control ECU
  • ID code box
 Engine start control status LIN
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