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System Diagram

WARNING: This page is about a different car, the 2007 Lexus ES 350. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: SRS System Diagram (1 Of 2)
G05251408Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 2: SRS System Diagram (2 Of 2)
G05251409Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
ECU REFERENCE CHART

Transmitting ECU (Transmitter) Receiving ECU Signals Communication method
Center Airbag Sensor Assembly ECM Crash detection signal CAN
Center Airbag Sensor Assembly Main Body ECU Driver seat buckle switch signal
Center Airbag Sensor Assembly Combination Meter Assembly
  • SRS warning light ON demand signal
  • SRS warning light blink demand signal
  • Passenger seat occupant detection signal
  • Passenger seat buckle switch signal
  • Diagnosis signal (DTC)
Combination Meter Assembly Center Airbag Sensor Assembly
  • Vehicle speed signal
  • Meter diagnosis polling signal
ECM Center Airbag Sensor Assembly
  • Engine speed signal
  • Accelerator opening angle information
  • Accelerator opening angle signal
  • Shift position signal
  • Test mode signal
  • Stop signal
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