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System Diagram

Fig 1: Steering Lock System Diagram
G04950130Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Input and output signals of each ECU 

ECU INPUT AND OUTPUT SIGNALS REFERENCE

Transmitting ECU Receiving ECU Signals Communication Method
Main Body ECU Steering Lock ECU Power supply status (to steering lock motor) LIN
Steering Lock ECU
  • Certification ECU
  • Main Body ECU
  • ID Code Box
 Sleep available status LIN
Steering Lock ECU
  • Certification ECU
  • Main Body ECU
  • ID Code Box
 Lock / Unlock sensor status LIN
Steering Lock ECU
  • Certification ECU
  • Main Body ECU
  • ID Code Box
 Steering lock status LIN
Steering Lock ECU
  • Certification ECU
  • Main Body ECU
  • ID Code Box
 Motor control status LIN
Steering Lock ECU
  • Certification ECU
  • Main Body ECU
  • ID Code Box
 Diagnostic response status LIN
Steering Lock ECU
  • Certification ECU
  • Main Body ECU
  • ID Code Box
 Lock / Unlock sensor malfunction LIN
Steering Lock ECU
  • Certification ECU
  • Main Body ECU
  • ID Code Box
 Power supply malfunction (to steering lock motor) LIN
Steering Lock ECU
  • Certification ECU
  • Main Body ECU
  • ID Code Box
 Motor driver malfunction LIN
Steering Lock ECU
  • Certification ECU
  • Main Body ECU
  • ID Code Box
 Lock bar (stuck) status LIN
Steering Lock ECU
  • Certification ECU
  • Main Body ECU
  • ID Code Box
 Push button start function status LIN
Steering Lock ECU
  • Certification ECU
  • Main Body ECU
  • ID Code Box
 Lock / Unlock relay drive status LIN
Steering Lock ECU
  • Certification ECU
  • Main Body ECU
  • ID Code Box
 Engine start control status LIN
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