Home/Toyota/Tundra/Toyota Tundra II (2007-2013)/Repair manual/Restraints Control Systems/Occupant Classification System (Diagnostic Codes): Other
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Occupant Classification System (Diagnostic Codes): Other Toyota Tundra II

PROCEDURE

  1. CHECK FOR DTC Turn the ignition switch ON, and wait for at least 60 seconds. Clear any DTCs stored in the center airbag sensor. Refer to «DTC CHECK / CLEAR»(ref-389466-S36147380192011032200000) . Turn the ignition switch OFF. Turn the ignition switch ON, and wait for at least 60 seconds. Using the Techstream, check for DTCs of the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-389466-S36147380192011032200000) . OK DTC B1785 is not output. HINT: DTCs other than DTC B1785 may be output at this time, but they are not related to this check. NG --> Go to next step OK --> See step 12
  2. PERFORM ZERO POINT CALIBRATION Connect the Techstream to the DLC3. Turn the ignition switch ON, and wait for at least 60 seconds. Using the Techstream, perform the zero point calibration. Refer to «INITIALIZATION»(ref-389466-S10312972172011032200000) . NG --> See step 5 OK: Go to next step
  3. PERFORM SENSITIVITY CHECK Using the Techstream, perform the sensitivity check. Refer to «INITIALIZATION»(ref-389466-S10312972172011032200000) . Standard range 27 to 33 kg (59.5 to 72.8 lb) NG --> See step 5 OK: Go to next step
  4. CHECK FOR DTC Turn the ignition switch ON, and wait for at least 60 seconds. Clear any DTCs stored in the center airbag sensor. Refer to «DTC CHECK / CLEAR»(ref-389466-S36147380192011032200000) . Turn the ignition switch OFF. Turn the ignition switch ON, and wait for at least 60 seconds. Using the Techstream, check for DTCs of the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-389466-S36147380192011032200000) . OK DTC B1785 is not output. HINT: DTCs other than DTC B1785 may be output at this time, but they are not related to this check. NG --> Go to next step OK --> END
  5. REPLACE FRONT SEAT FRAME WITH ADJUSTER ASSEMBLY RH Turn the ignition switch OFF. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds. Replace the front seat frame with adjuster RH. Refer to «REMOVAL»(ref-389422-S14958358232011032200000) . HINT: Perform the inspection using parts from a normal vehicle when possible. NEXT: Go to next step
  6. PERFORM ZERO POINT CALIBRATION Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds. Connect the Techstream to the DLC3. Turn the ignition switch ON, and wait for at least 60 seconds. Using the Techstream, perform the zero point calibration. Refer to «INITIALIZATION»(ref-389466-S10312972172011032200000) . NG --> See step 9 OK: Go to next step
  7. PERFORM SENSITIVITY CHECK Using the Techstream, perform the sensitivity check. Refer to «INITIALIZATION»(ref-389466-S10312972172011032200000) . Standard range 27 to 33 kg (59.5 to 72.8 lb) NG --> See step 9 OK: Go to next step
  8. CHECK FOR DTC Connect the connectors to the occupant classification ECU and the front occupant detection sensor LH. Turn the ignition switch ON, and wait for at least 60 seconds. Clear any DTCs stored in the memory. Refer to «DTC CHECK / CLEAR»(ref-389466-S36147380192011032200000) . HINT: First clear DTCs stored in the occupant classification ECU and then in the center airbag sensor. Use the Techstream to clear the DTCs of the occupant classification ECU, otherwise the DTCs cannot be cleared. Turn the ignition switch OFF. Turn the ignition switch ON, and wait for at least 60 seconds. Using the Techstream, check for DTCs of the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-389466-S36147380192011032200000) . OK DTC B1785 is not output. HINT: DTCs other than DTC B1785 may be output at this time, but they are not related to this check. NG --> Go to next step OK --> END
  9. REPLACE OCCUPANT CLASSIFICATION ECU Turn the ignition switch OFF. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds. Replace the occupant classification ECU. for Manual Seat. Refer to «DISASSEMBLY»(ref-389422-S42057103112011032200000) for Power Seat. Refer to «DISASSEMBLY»(ref-389422-S26760409282011032200000) HINT: Perform the inspection using parts from a normal vehicle when possible. NEXT: Go to next step
  10. PERFORM ZERO POINT CALIBRATION Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds. Connect the Techstream to the DLC3. Turn the ignition switch ON, and wait for at least 60 seconds. Using the Techstream, perform the zero point calibration. Refer to «INITIALIZATION»(ref-389466-S10312972172011032200000) . NEXT: Go to next step
  11. PERFORM SENSITIVITY CHECK Using the Techstream, perform the sensitivity check. Refer to «INITIALIZATION»(ref-389466-S10312972172011032200000) . Standard range 27 to 33 kg (59.5 to 72.8 lb) NEXT --> END
  12. USE SIMULATION METHOD TO CHECK. Refer to «DIAGNOSIS SYSTEM»(ref-389466-S11562162802011032200000)
  1. CHECK FOR DTC Turn the ignition switch ON, and wait for at least 60 seconds. Clear any DTCs stored in the center airbag sensor. Refer to «DTC CHECK / CLEAR»(ref-389466-S36147380192011032200000) . Turn the ignition switch OFF. Turn the ignition switch ON, and wait for at least 60 seconds. Using the Techstream, check for DTCs of the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-389466-S36147380192011032200000) . OK DTC B1786 is not output. HINT: DTCs other than DTC B1786 may be output at this time, but they are not related to this check. NG --> Go to next step OK --> See step 12
  2. PERFORM ZERO POINT CALIBRATION Connect the Techstream to the DLC3. Turn the ignition switch ON, and wait for at least 60 seconds. Using the Techstream, perform the zero point calibration. Refer to «INITIALIZATION»(ref-389466-S10312972172011032200000) . NG --> See step 5 OK: Go to next step
  3. PERFORM SENSITIVITY CHECK Using the Techstream, perform the sensitivity check. Refer to «INITIALIZATION»(ref-389466-S10312972172011032200000) . Standard range 27 to 33 kg (59.5 to 72.8 lb) NG --> See step 5 OK: Go to next step
  4. CHECK FOR DTC Turn the ignition switch ON, and wait for at least 60 seconds. Clear any DTCs stored in the center airbag sensor. Refer to «DTC CHECK / CLEAR»(ref-389466-S36147380192011032200000) . Turn the ignition switch OFF. Turn the ignition switch ON, and wait for at least 60 seconds. Using the Techstream, check for DTCs of the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-389466-S36147380192011032200000) . OK DTC B1786 is not output. HINT: DTCs other than DTC B1786 may be output at this time, but they are not related to this check. NG --> Go to next step OK --> END
  5. REPLACE FRONT SEAT FRAME WITH ADJUSTER ASSEMBLY RH Turn the ignition switch OFF. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds. Replace the front seat frame with adjuster RH. Refer to «REMOVAL»(ref-389422-S14958358232011032200000) . HINT: Perform the inspection using parts from a normal vehicle when possible. NEXT: Go to next step
  6. PERFORM ZERO POINT CALIBRATION Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds. Connect the Techstream to the DLC3. Turn the ignition switch ON, and wait for at least 60 seconds. Using the Techstream, perform the zero point calibration. Refer to «INITIALIZATION»(ref-389466-S10312972172011032200000) . NG --> See step 9 OK: Go to next step
  7. PERFORM SENSITIVITY CHECK Using the Techstream, perform the sensitivity check. Refer to «INITIALIZATION»(ref-389466-S10312972172011032200000) . Standard range 27 to 33 kg (59.5 to 72.8 lb) NG --> See step 9 OK: Go to next step
  8. CHECK FOR DTC Connect the connectors to the occupant classification ECU and the front occupant detection sensor RH. Turn the ignition switch ON, and wait for at least 60 seconds. Clear any DTCs stored in the memory. Refer to «DTC CHECK / CLEAR»(ref-389466-S36147380192011032200000) . HINT: First clear DTCs stored in the occupant classification ECU and then in the center airbag sensor. Use the Techstream to clear the DTCs of the occupant classification ECU, otherwise the DTCs cannot be cleared. Turn the ignition switch OFF. Turn the ignition switch ON, and wait for at least 60 seconds. Using the Techstream, check for DTCs of the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-389466-S36147380192011032200000) . OK DTC B1786 is not output. HINT: DTCs other than DTC B1786 may be output at this time, but they are not related to this check. NG --> Go to next step OK --> END
  9. REPLACE OCCUPANT CLASSIFICATION ECU Turn the ignition switch OFF. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds. Replace the occupant classification ECU. for Manual Seat. Refer to «DISASSEMBLY»(ref-389422-S42057103112011032200000) for Power Seat. Refer to «DISASSEMBLY»(ref-389422-S26760409282011032200000) HINT: Perform the inspection using parts from a normal vehicle when possible. NEXT: Go to next step
  10. PERFORM ZERO POINT CALIBRATION Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds. Connect the Techstream to the DLC3. Turn the ignition switch ON, and wait for at least 60 seconds. Using the Techstream, perform the zero point calibration. Refer to «INITIALIZATION»(ref-389466-S10312972172011032200000) . NEXT: Go to next step
  11. PERFORM SENSITIVITY CHECK Using the Techstream, perform the sensitivity check. Refer to «INITIALIZATION»(ref-389466-S10312972172011032200000) . Standard range 27 to 33 kg (59.5 to 72.8 lb) NEXT --> END
  12. USE SIMULATION METHOD TO CHECK. Refer to «DIAGNOSIS SYSTEM»(ref-389466-S11562162802011032200000)
  1. CHECK FOR DTC Turn the ignition switch ON, and wait for at least 60 seconds. Clear any DTCs stored in the center airbag sensor. Refer to «DTC CHECK / CLEAR»(ref-389466-S36147380192011032200000) . Turn the ignition switch OFF. Turn the ignition switch ON, and wait for at least 60 seconds. Using the Techstream, check for DTCs of the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-389466-S36147380192011032200000) . OK DTC B1787 is not output. HINT: DTCs other than DTC B1787 may be output at this time, but they are not related to this check. NG --> Go to next step OK --> See step 12
  2. PERFORM ZERO POINT CALIBRATION Connect the Techstream to the DLC3. Turn the ignition switch ON, and wait for at least 60 seconds. Using the Techstream, perform the zero point calibration. Refer to «INITIALIZATION»(ref-389466-S10312972172011032200000) . NG --> See step 5 OK: Go to next step
  3. PERFORM SENSITIVITY CHECK Using the Techstream, perform the sensitivity check. Refer to «INITIALIZATION»(ref-389466-S10312972172011032200000) . Standard range 27 to 33 kg (59.5 to 72.8 lb) NG --> See step 5 OK: Go to next step
  4. CHECK FOR DTC Turn the ignition switch ON, and wait for at least 60 seconds. Clear any DTCs stored in the center airbag sensor. Refer to «DTC CHECK / CLEAR»(ref-389466-S36147380192011032200000) . Turn the ignition switch OFF. Turn the ignition switch ON, and wait for at least 60 seconds. Using the Techstream, check for DTCs of the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-389466-S36147380192011032200000) . OK DTC B1787 is not output. HINT: DTCs other than DTC B1787 may be output at this time, but they are not related to this check. NG --> Go to next step OK --> END
  5. REPLACE FRONT SEAT FRAME WITH ADJUSTER ASSEMBLY RH Turn the ignition switch OFF. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds. Replace the front seat frame with adjuster RH. Refer to «REMOVAL»(ref-389422-S14958358232011032200000) . HINT: Perform the inspection using parts from a normal vehicle when possible. NEXT: Go to next step
  6. PERFORM ZERO POINT CALIBRATION Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds. Connect the Techstream to the DLC3. Turn the ignition switch ON, and wait for at least 60 seconds. Using the Techstream, perform the zero point calibration. Refer to «INITIALIZATION»(ref-389466-S10312972172011032200000) . NG --> See step 9 OK: Go to next step
  7. PERFORM SENSITIVITY CHECK Using the Techstream, perform the sensitivity check. Refer to «INITIALIZATION»(ref-389466-S10312972172011032200000) . Standard range 27 to 33 kg (59.5 to 72.8 lb) NG --> See step 9 OK: Go to next step
  8. CHECK FOR DTC Connect the connectors to the occupant classification ECU and the rear occupant detection sensor LH. Turn the ignition switch ON, and wait for at least 60 seconds. Clear any DTCs stored in the memory. Refer to «DTC CHECK / CLEAR»(ref-389466-S36147380192011032200000) . HINT: First clear DTCs stored in the occupant classification ECU and then in the center airbag sensor. Use the Techstream to clear the DTCs of the occupant classification ECU, otherwise the DTCs cannot be cleared. Turn the ignition switch OFF. Turn the ignition switch ON, and wait for at least 60 seconds. Using the Techstream, check for DTCs of the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-389466-S36147380192011032200000) . OK DTC B1787 is not output. HINT: DTCs other than DTC B1787 may be output at this time, but they are not related to this check. NG --> Go to next step OK --> END
  9. REPLACE OCCUPANT CLASSIFICATION ECU Turn the ignition switch OFF. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds. Replace the occupant classification ECU. for Manual Seat. Refer to «DISASSEMBLY»(ref-389422-S42057103112011032200000) for Power Seat. Refer to «DISASSEMBLY»(ref-389422-S26760409282011032200000) HINT: Perform the inspection using parts from a normal vehicle when possible. NEXT: Go to next step
  10. PERFORM ZERO POINT CALIBRATION Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds. Connect the Techstream to the DLC3. Turn the ignition switch ON, and wait for at least 60 seconds. Using the Techstream, perform the zero point calibration. Refer to «INITIALIZATION»(ref-389466-S10312972172011032200000) . NEXT: Go to next step
  11. PERFORM SENSITIVITY CHECK Using the Techstream, perform the sensitivity check. Refer to «INITIALIZATION»(ref-389466-S10312972172011032200000) . Standard range 27 to 33 kg (59.5 to 72.8 lb) NEXT --> END
  12. USE SIMULATION METHOD TO CHECK. Refer to «DIAGNOSIS SYSTEM»(ref-389466-S11562162802011032200000)
  1. CHECK FOR DTC Turn the ignition switch ON, and wait for at least 60 seconds. Clear any DTCs stored in the center airbag sensor. Refer to «DTC CHECK / CLEAR»(ref-389466-S36147380192011032200000) . Turn the ignition switch OFF. Turn the ignition switch ON, and wait for at least 60 seconds. Using the Techstream, check for DTCs of the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-389466-S36147380192011032200000) . OK DTC B1788 is not output. HINT: DTCs other than DTC B1788 may be output at this time, but they are not related to this check. NG --> Go to next step OK --> See step 12
  2. PERFORM ZERO POINT CALIBRATION Connect the Techstream to the DLC3. Turn the ignition switch ON, and wait for at least 60 seconds. Using the Techstream, perform the zero point calibration. Refer to «INITIALIZATION»(ref-389466-S10312972172011032200000) . NG --> See step 5 OK: Go to next step
  3. PERFORM SENSITIVITY CHECK Using the Techstream, perform the sensitivity check. Refer to «INITIALIZATION»(ref-389466-S10312972172011032200000) . Standard range 27 to 33 kg (59.5 to 72.8 lb) NG --> See step 5 OK: Go to next step
  4. CHECK FOR DTC Turn the ignition switch ON, and wait for at least 60 seconds. Clear the DTCs stored in the center airbag sensor. Refer to «DTC CHECK / CLEAR»(ref-389466-S36147380192011032200000) . Turn the ignition switch OFF. Turn the ignition switch ON, and wait for at least 60 seconds. Using the Techstream, check for DTCs of the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-389466-S36147380192011032200000) . OK DTC B1788 is not output. HINT: DTCs other than DTC B1788 may be output at this time, but they are not related to this check. NG --> Go to next step OK --> END
  5. REPLACE FRONT SEAT FRAME WITH ADJUSTER ASSEMBLY RH Turn the ignition switch OFF. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds. Replace the front seat frame with adjuster RH. Refer to «REMOVAL»(ref-389422-S14958358232011032200000) . HINT: Perform the inspection using parts from a normal vehicle when possible. NEXT: Go to next step
  6. PERFORM ZERO POINT CALIBRATION Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds. Connect the Techstream to the DLC3. Turn the ignition switch ON, and wait for at least 60 seconds. Using the Techstream, perform the zero point calibration. Refer to «INITIALIZATION»(ref-389466-S10312972172011032200000) . NG --> See step 9 OK: Go to next step
  7. PERFORM SENSITIVITY CHECK Using the Techstream, perform the sensitivity check. Refer to «INITIALIZATION»(ref-389466-S10312972172011032200000) . Standard range 27 to 33 kg (59.5 to 72.8 lb) NG --> See step 9 OK: Go to next step
  8. CHECK FOR DTC Connect the connectors to the occupant classification ECU and the rear occupant detection sensor RH. Turn the ignition switch ON, and wait for at least 60 seconds. Clear any DTCs stored in the memory. Refer to «DTC CHECK / CLEAR»(ref-389466-S36147380192011032200000) . HINT: First clear DTCs stored in the occupant classification ECU and then in the center airbag sensor. Use the Techstream to clear the DTCs of the occupant classification ECU, otherwise the DTCs cannot be cleared. Turn the ignition switch OFF. Turn the ignition switch ON, and wait for at least 60 seconds. Using the Techstream, check for DTCs of the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-389466-S36147380192011032200000) . OK DTC B1788 is not output. HINT: DTCs other than DTC B1788 may be output at this time, but they are not related to this check. NG --> Go to next step OK --> END
  9. REPLACE OCCUPANT CLASSIFICATION ECU Turn the ignition switch OFF. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds. Replace the occupant classification ECU. for Manual Seat. Refer to «DISASSEMBLY»(ref-389422-S42057103112011032200000) for Power Seat. Refer to «DISASSEMBLY»(ref-389422-S26760409282011032200000) HINT: Perform the inspection using parts from a normal vehicle when possible. NEXT: Go to next step
  10. PERFORM ZERO POINT CALIBRATION Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds. Connect the Techstream to the DLC3. Turn the ignition switch ON, and wait for at least 60 seconds. Using the Techstream, perform the zero point calibration. Refer to «INITIALIZATION»(ref-389466-S10312972172011032200000) . NEXT: Go to next step
  11. PERFORM SENSITIVITY CHECK Using the Techstream, perform the sensitivity check. Refer to «INITIALIZATION»(ref-389466-S10312972172011032200000) . Standard range 27 to 33 kg (59.5 to 72.8 lb) NEXT --> END
  12. USE SIMULATION METHOD TO CHECK. Refer to «DIAGNOSIS SYSTEM»(ref-389466-S11562162802011032200000)
  1. CHECK FOR DTC Turn the ignition switch ON, and wait for at least 60 seconds. Clear any DTCs stored in the memory. Refer to «DTC CHECK / CLEAR»(ref-389466-S36147380192011032200000) . HINT: First clear DTCs stored in the occupant classification ECU and then in the center airbag sensor. Use the Techstream to clear the DTCs of the occupant classification ECU, otherwise the DTCs cannot be cleared. Turn the ignition switch OFF, and wait for at least 10 seconds. Turn the ignition switch ON, and wait for at least 60 seconds. Using the Techstream, check for DTCs of the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-389466-S36147380192011032200000) . OK DTC B1795 is not output. HINT: DTCs other than DTC B1795 may be output at this time, but they are not related to this check. NG --> Go to next step OK --> See step 5
  2. REPLACE OCCUPANT CLASSIFICATION ECU Turn the ignition switch OFF. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds. Replace the occupant classification ECU. for Power Seat. Refer to «DISASSEMBLY»(ref-389422-S26760409282011032200000) for Manual Seat. Refer to «DISASSEMBLY»(ref-389422-S42057103112011032200000) HINT: Perform the inspection using parts from a normal vehicle when possible. NEXT: Go to next step
  3. PERFORM ZERO POINT CALIBRATION Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds. Connect the Techstream to the DLC3. Turn the ignition switch ON, and wait for at least 60 seconds. Using the Techstream, perform the zero point calibration. Refer to «INITIALIZATION»(ref-389466-S10312972172011032200000) . NEXT: Go to next step
  4. PERFORM SENSITIVITY CHECK Using the Techstream, perform the sensitivity check. Refer to «INITIALIZATION»(ref-389466-S10312972172011032200000) . Standard range 27 to 33 kg (59.5 to 72.8 lb) NEXT --> END
  5. USE SIMULATION METHOD TO CHECK. Refer to «DIAGNOSIS SYSTEM»(ref-389466-S11562162802011032200000)
  1. CHECK FOR DTC Turn the ignition switch ON, and wait for at least 60 seconds. Clear any DTCs stored in the memory. Refer to «DTC CHECK / CLEAR»(ref-389466-S36147380192011032200000) . HINT: First clear DTCs stored in the occupant classification ECU and then in the center airbag sensor. Use the Techstream to clear the DTCs of the occupant classification ECU, otherwise the DTCs cannot be cleared. Turn the ignition switch OFF, and wait for at least 10 seconds. Turn the ignition switch ON, and wait for at least 60 seconds. Using the Techstream, check for DTCs of the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-389466-S36147380192011032200000) . OK DTC B1796 is not output. HINT: DTCs other than DTC B1796 may be output at this time, but they are not related to this check. NG --> Go to next step OK --> See step 5
  2. REPLACE OCCUPANT CLASSIFICATION ECU Turn the ignition switch OFF. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds. Replace the occupant classification ECU. for Manual Seat. Refer to «DISASSEMBLY»(ref-389422-S42057103112011032200000) for Power Seat. Refer to «DISASSEMBLY»(ref-389422-S26760409282011032200000) HINT: Perform the inspection using parts from a normal vehicle when possible. NEXT: Go to next step
  3. PERFORM ZERO POINT CALIBRATION Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds. Connect the Techstream to the DLC3. Turn the ignition switch ON, and wait for at least 60 seconds. Using the Techstream, perform the zero point calibration. Refer to «INITIALIZATION»(ref-389466-S10312972172011032200000) . NEXT: Go to next step
  4. PERFORM SENSITIVITY CHECK Using the Techstream, perform the sensitivity check. Refer to «INITIALIZATION»(ref-389466-S10312972172011032200000) . Standard range 27 to 33 kg (59.5 to 72.8 lb) NEXT --> END
  5. USE SIMULATION METHOD TO CHECK. Refer to «DIAGNOSIS SYSTEM»(ref-389466-S11562162802011032200000)