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Home >> Toyota >> 2011 >> Camry Base, Standard >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Airbag System (For TMC Made) (Diagnostic Codes & Circuit Tests) (Except Hybrid) >> AIRBAG SYSTEM (for TMC Made) >> DTC B1650/32: Occupant Classification System Malfunction >> Procedure

DTC B1650/32: Occupant Classification System Malfunction: Procedure

  1. CHECK DTC (OCCUPANT CLASSIFICATION ECU) 
    1. Turn the ignition switch on (IG), and wait for at least 10 seconds.
    2. Using Techstream, check the DTCs of the occupant classification ECU. Refer to DTC CHECK / CLEAR .

      OK

      DTC is not output.

    NG → See step   20 

    OK: Go to next step 

  2. CHECK DTC (CENTER AIRBAG SENSOR ASSEMBLY) 
    1. Turn the ignition switch on (IG), and wait for at least 60 seconds.
      Fig 1: Identifying DTC (Center Airbag Sensor Assembly) Connector Terminal Identification
      GTY186764Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Clear the DTCs stored in the memory. Refer to DTC CHECK / CLEAR .
    3. Turn the ignition switch off.
    4. Turn the ignition switch on (IG), and wait for at least 60 seconds.
    5. Check the DTCs. Refer to DTC CHECK / CLEAR .

      OK

      DTC B1650/32 is not output.

      HINT: 

      Codes other than DTC B1650/32 may be output at this time, but they are not related to this check.

    OK → See step   18 

    NG: Go to next step 

  3. CHECK CONNECTION OF CONNECTORS 
    1. Turn the ignition switch off.
    2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
    3. Check that the connectors are properly connected to the center airbag sensor assembly and the occupant classification ECU.

      OK

      The connectors are properly connected.

    NG → CONNECT CONNECTORS PROPERLY 

    OK: Go to next step 

  4. CHECK CONNECTORS 
    1. Disconnect the connectors from the center airbag sensor assembly and the occupant classification ECU.
    2. Check that the connectors (on the center airbag sensor assembly side and occupant classification ECU side) are not damaged.

      OK

      The connectors are not deformed or damaged.

    NG → REPAIR OR REPLACE WIRE HARNESS 

    OK: Go to next step 

  5. CHECK VEHICLE TYPE 
    1. Check the front passenger side seat type.

      Result

      Result Proceed to
      for Manual seat A
      for Power seat B

    B → See step   10 

    A: Go to next step 

  6. CHECK FLOOR WIRE NO. 2 (OPEN) 
    1. Using a service wire, connect terminals 12 (FSP+) and 13 (FSP-) of connector B.
      Fig 2: Identifying Floor Wire No 2 (Open) Connector Terminal Identification
      GTY168247Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:

      Do not forcibly insert a service wire into the terminals of the connector when connecting.

    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Terminal Connection Condition Specified Condition
      O4-8 (FSR+) - O4-4 (FSR-) Always Below 1 Ω

    NG → REPAIR OR REPLACE FLOOR WIRE NO. 2 

    OK: Go to next step 

  7. CHECK FLOOR WIRE NO. 2 (SHORT) 
    1. Disconnect the service wire from connector B.
      Fig 3: Identifying Floor Wire No. 2 Connector Terminal Identification
      GTY158822Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Terminal Connection Condition Specified Condition
      O4-8 (FSR+) - O4-4 (FSR-) Always 1 MΩ or higher

    NG → REPAIR OR REPLACE FLOOR WIRE NO. 2 

    OK: Go to next step 

  8. CHECK FLOOR WIRE NO. 2 (SHORT TO B+) 
    1. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
      Fig 4: Identifying Floor Wire No. 2 Connector Terminal Identification
      GTY158822Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Turn the ignition switch on (IG).
    3. Measure the voltage according to the value(s) in the table below.

      Standard voltage

      Tester Connection Condition Specified Condition
      O4-8 (FSR+) - Body ground Ignition switch on (IG) Below 1 V
      O4-4 (FSR-) - Body ground Ignition switch on (IG) Below 1 V

    NG → REPAIR OR REPLACE FLOOR WIRE NO. 2 

    OK: Go to next step 

  9. CHECK FLOOR WIRE NO. 2 (SHORT TO GROUND) 
    1. Turn the ignition switch off.
      Fig 5: Identifying Floor Wire No. 2 Connector Terminal Identification
      GTY158822Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Condition Specified Condition
      O4-8 (FSR+) - Body ground Always 1 MΩ or higher
      O4-4 (FSR-) - Body ground Always 1 MΩ or higher

      HINT: 

      After replacing the center airbag sensor assembly, check for DTCs of the center airbag sensor assembly. If the DTC B1650/32 is detected, replace the occupant classification ECU. Refer to REMOVAL and perform "zero point calibration" and "sensitivity check" of the occupant classification system. Refer to INITIALIZATION .

    NG → REPAIR OR REPLACE FLOOR WIRE NO. 2 

    OK → See step   19 

  10. CHECK OCCUPANT CLASSIFICATION SYSTEM CIRCUIT (OPEN) 
    1. Using a service wire, connect terminals 12 (FSP+) and 13 (FSP-) of connector B.
      Fig 6: Identifying Occupant Classification System Circuit Connector Terminal Identification
      GTY201388Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:

      Do not forcibly insert a service wire into the terminal of the connector when connecting.

    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Condition Specified Condition
      T10-8 (FSR+) - T10-4 (FSR-) Always Below 1 Ω

    NG → See step   14 

    OK: Go to next step 

  11. CHECK OCCUPANT CLASSIFICATION SYSTEM CIRCUIT (SHORT) 
    1. Disconnect the service wire from connector B.
      Fig 7: Identifying Occupant Classification System Circuit Connector Terminal Identification
      GTY200947Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Condition Specified Condition
      T10-8 (FSR+) - T10-4 (FSR-) Always 1 MΩ or higher

    NG → See step   15 

    OK: Go to next step 

  12. CHECK OCCUPANT CLASSIFICATION SYSTEM CIRCUIT (SHORT TO B+) 
    1. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
      Fig 8: Identifying Occupant Classification System Circuit Connector Terminal Identification
      GTY200947Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Turn the ignition switch on (IG).
    3. Measure the voltage according to the value(s) in the table below.

      Standard voltage

      Tester Connection Condition Specified Condition
      T10-8 (FSR+) - Body ground Ignition switch on (IG) Below 1 V
      T10-4 (FSR-) - Body ground Ignition switch on (IG) Below 1 V

    NG → See step   16 

    OK: Go to next step 

  13. CHECK OCCUPANT CLASSIFICATION SYSTEM CIRCUIT (SHORT TO GROUND) 
    1. Turn the ignition switch off.
      Fig 9: Identifying Occupant Classification System Circuit Connector Terminal Identification
      GTY200947Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Condition Specified Condition
      T10-8 (FSR+) - Body ground Always 1 MΩ or higher
      T10-4 (FSR-) - Body ground Always 1 MΩ or higher

      HINT: 

      After replacing the center airbag sensor assembly, check for DTCs of the center airbag sensor assembly. If the DTC B1650/32 is detected, replace the occupant classification ECU. Refer to REMOVAL and perform "zero point calibration" and "sensitivity check" of the occupant classification system. Refer to INITIALIZATION .

    NG → See step   17 

    OK → See step   19 

  14. CHECK FLOOR WIRE NO. 2 (OPEN) 
    1. Disconnect the front seat wire RH connector from the floor wire No. 2.
      Fig 10: Identifying Floor Wire No 2 (Open) Connector Terminal Identification
      GTY184968Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT: 

      The service wire has already been inserted into connector B.

    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Condition Specified Condition
      OT1-1 (FSR+) - OT1-4 (FSR-) Always Below 1 Ω

    NG → REPAIR OR REPLACE FLOOR WIRE NO. 2 

    OK → REPAIR OR REPLACE FRONT SEAT WIRE RH 

  15. CHECK FLOOR WIRE NO. 2 (SHORT) 
    1. Disconnect the front seat wire RH connector from the floor wire No. 2.
      Fig 11: Identifying Floor Wire No. 2 Connector Terminal Identification
      GTY190430Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Condition Specified Condition
      OT1-1 (FSR+) - OT1-4 (FSR-) Always 1 MΩ or higher

    NG → REPAIR OR REPLACE FLOOR WIRE NO. 2 

    OK → REPAIR OR REPLACE FRONT SEAT WIRE RH 

  16. CHECK FLOOR WIRE NO. 2 (SHORT TO B+) 
    1. Turn the ignition switch off.
      Fig 12: Identifying Floor Wire No. 2 Connector Terminal Identification
      GTY190430Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
    3. Disconnect the front seat wire RH connector from the floor wire No. 2.
    4. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
    5. Turn the ignition switch on (IG).
    6. Measure the voltage according to the value(s) in the table below.

      Standard voltage

      Tester Connection Condition Specified Condition
      OT1-1 (FSR+) - Body ground Ignition switch on (IG) Below 1 V
      OT1-4 (FSR-) - Body ground Ignition switch on (IG) Below 1 V

    NG → REPAIR OR REPLACE FLOOR WIRE NO. 2 

    OK → REPAIR OR REPLACE FRONT SEAT WIRE RH 

  17. CHECK FLOOR WIRE NO. 2 (SHORT TO GROUND) 
    1. Disconnect the front seat wire RH connector from the floor wire No. 2.
      Fig 13: Identifying Floor Wire No. 2 Connector Terminal Identification
      GTY190430Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Condition Specified Condition
      OT1-1 (FSR+) - Body ground Always 1 MΩ or higher
      OT1-4 (FSR-) - Body ground Always 1 MΩ or higher

    NG → REPAIR OR REPLACE FLOOR WIRE NO. 2 

    OK → REPAIR OR REPLACE FRONT SEAT WIRE RH 

  18. USE SIMULATION METHOD TO CHECK. Refer to  DIAGNOSIS SYSTEM 
  19. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to  REMOVAL 
  20. GO TO OCCUPANT CLASSIFICATION SYSTEM. Refer to  DIAGNOSTIC TROUBLE CODE CHART 
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