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Occupant Classification Ecu: Replacement

  1. PRECAUTION (SEE  SUPPLEMENTAL RESTRAINT SYSTEM  ) 
  2. DISCONNECT BATTERY NEGATIVE TERMINAL 
    CAUTION: After removing the terminal, wait for at least 90 seconds before starting the operation.
  3. REMOVE FRONT RH SEAT ASSY (SEE  OVERHAUL  ) 
  4. REMOVE OCCUPANT CLASSIFICATION ECU 
    1. Disconnect the connector from the occupant classification ECU.
    2. Using a screwdriver, remove the occupant classification ECU.
      Fig 1: Removing Occupant Classification ECU
      G02635444Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. INSTALL OCCUPANT CLASSIFICATION ECU 
    1. Check that the ignition switch is off.
    2. Check that the battery negative (-) terminal is disconnected.
      CAUTION: After removing the terminal, wait for at least 90 seconds before starting the operation.
    3. Install the occupant classification ECU.
      NOTE:
      • If the occupant classification ECU has been dropped, or there are cracks, dents or other defects in the case or connector, replace it with a new one.
      • When installing the occupant classification ECU, be careful that the SRS wiring does not interfere with other parts and that it is not pinched between other parts.
    4. Connect the connector to the occupant classification ECU.
  6. INSTALL FRONT RH SEAT ASSY (SEE  OVERHAUL  ) 
  7. CONNECT BATTERY NEGATIVE TERMINAL 
  8. OCCUPANT CLASSIFICATION ECU INITIALIZATION (SEE  INITIALIZATION  ) 
  9. INSPECT SRS WARNING LIGHT (SEE  DIAGNOSIS SYSTEM  ) 
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