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Home >> Scion >> 2009 >> xB Standard >> Repair and Diagnosis (Single Page) >> Restraints >> Air Bag, SRS >> Supplemental Restraint System >> Airbag System >> DTC B1623/81 Side Airbag Sensor Assembly RH Initialization Incomplete; DTC B1628/82 Side Airbag Sensor Assembly LH Initialization Incomplete; DTC B1643/81 Side Satellite Sensor Bus RH Initialization Incomplete; DTC B1648/82 Side Satellite Sensor Bus LH Initialization Incomplete >> Inspection Procedure
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Inspection Procedure

  1. CHECK PAST DTC 
    1. Turn the ignition switch to ON, and wait for at least 60 seconds.
    2. Turn the ignition switch to OFF.
    3. Turn the ignition switch to ON, and wait for at least 60 seconds.
    4. Check the past DTCs (see DTC CHECK / CLEAR  ).

      Result: 

      RESULT CHART

      Result Proceed to
      DTC B1622 or B1627 is output A
      DTC B1632 or B1637 is output B
      DTC B1622, B1627, B1632 and B1637 are not output C

    A:  Go TO DTC B1622 

    B:  Go TO DTC B1632 

    C: Go to next step 

  2. CHECK FOR DTC 
    1. Turn the ignition switch to OFF.
    2. Turn the ignition switch to ON, and wait for at least 60 seconds.
    3. Check for DTCs (see DTC CHECK / CLEAR  ).

      Result: 

      RESULT CHART

      Result Proceed to
      DTC B1623, B1628, B1643 and B1648 are not output A
      DTC B1628 or B1648 is output B
      DTC B1623 or B1643 is output C

    A : USE SIMULATION METHOD TO CHECK  (See DIAGNOSIS SYSTEM  )

    B:  Go to step  11

    C: Go to next step 

  3. CHECK CONNECTION OF CONNECTORS 
    1. Turn the ignition switch to 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 and side airbag sensor RH.

      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 and side airbag sensor RH.
    2. Check that the connectors (on the center airbag sensor side and side airbag sensor RH side) are not damaged.

      OK: 

      The connectors are not deformed or damaged. 

    NG : REPLACE NO. 2 FLOOR WIRE 

    OK: Go to next step 

  5. CHECK NO. 2 FLOOR WIRE (CENTER AIRBAG SENSOR - SIDE AIRBAG SENSOR RH) 
    Fig 1: Checking No. 2 Floor Wire (Center Airbag Sensor - Side Airbag Sensor RH)
    G05390236Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      TESTER CONNECTION SPECIFIED VOLTAGE CONDITION CHART

      Tester Connection Switch Condition Specified Condition
      I4-4 (BBR+) - Body ground Ignition switch ON Below 1 V
      I4-3 (BBR-) - Body ground Ignition switch ON Below 1 V
    4. Turn the ignition switch to OFF.
    5. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
    6. Using a service wire, connect terminals 8 (BBR+) and 11 (BBR-) of connector B.
      NOTE: Do not forcibly insert a service wire into the terminals of the connector when connecting the wire.
    7. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED RESISTANCE CONDITION CHART

      Tester Connection Condition Specified Condition
      I4-4 (BBR+) - I4-3 (BBR-) Always Below 1 Ω
    8. Disconnect the service wire from connector B.
    9. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED RESISTANCE CONDITION CHART

      Tester Connection Condition Specified Condition
      I4-4 (BBR+) - I4-3 (BBR-) Always 1 MΩ or higher
      I4-4 (BBR+) - Body ground Always 1 MΩ or higher
      I4-3 (BBR-) - Body ground Always 1 MΩ or higher

    NG : REPLACE NO. 2 FLOOR WIRE 

    OK: Go to next step 

  6. CHECK CONNECTION OF CONNECTORS 
    1. Check that the connector is properly connected to the rear airbag sensor RH.

      OK: 

      The connector is properly connected. 

    NG : CONNECT CONNECTOR PROPERLY 

    OK: Go to next step 

  7. CHECK CONNECTORS 
    1. Disconnect the connectors from the side airbag sensor RH and rear airbag sensor RH.
    2. Check that the connector (on the rear airbag sensor RH side) is not damaged.

      OK: 

      The connector is not deformed or damaged. 

    NG : REPLACE NO. 2 FLOOR WIRE 

    OK: Go to next step 

  8. CHECK NO. 2 FLOOR WIRE (SIDE AIRBAG SENSOR RH - REAR AIRBAG SENSOR RH) 
    Fig 2: Checking No. 2 Floor Wire (Side Airbag Sensor RH - Rear Airbag Sensor RH)
    G05390237Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      TESTER CONNECTION SPECIFIED VOLTAGE CONDITION CHART

      Tester Connection Switch Condition Specified Condition
      I4-1 (BCR+) - Body ground Ignition switch ON Below 1 V
      I4-2 (BCR-) - Body ground Ignition switch ON Below 1 V
    4. Turn the ignition switch to OFF.
    5. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
    6. Using a service wire, connect terminals 2 (BCR+) and 1 (BCR-) of connector C.
      NOTE: Do not forcibly insert a service wire into the terminals of the connector when connecting the wire.
    7. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED RESISTANCE CONDITION CHART

      Tester Connection Condition Specified Condition
      I4-1 (BCR+) - I4-2 (BCR-) Always Below 1 Ω
    8. Disconnect the service wire from connector C.
    9. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED RESISTANCE CONDITION CHART

      Tester Connection Condition Specified Condition
      I4-1 (BCR+) - I4-2 (BCR-) Always 1 MΩ or higher
      I4-1 (BCR+) - Body ground Always 1 MΩ or higher
      I4-2 (BCR-) - Body ground Always 1 MΩ or higher

    NG : REPLACE NO. 2 FLOOR WIRE 

    OK: Go to next step 

  9. CHECK SIDE AIRBAG SENSOR RH 
    1. Interchange the side airbag sensor LH with RH and connect the connectors to them.
    2. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
    3. Turn the ignition switch to ON, and wait for at least 60 seconds.
    4. Clear the DTCs stored in the memory (see DTC CHECK / CLEAR  ).
    5. Turn the ignition switch to OFF.
    6. Turn the ignition switch to ON, and wait for at least 90 seconds.
      Fig 3: Identifying Side Airbag Sensor RH
      G04950996Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    7. Check for DTCs (see DTC CHECK / CLEAR  ).

      Result 

      RESULT CHART

      Result Proceed to
      DTC B1623, B1628, B1643 and B1648 are not output A
      DTC B1628 or B1648 is output B
      DTC B1623 or B1643 is output C
    8. Turn the ignition switch to OFF.
    9. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
    10. Return the side airbag sensor LH and RH to their original position and connect the connectors to them.

    A : USE SIMULATION METHOD TO CHECK  (See DIAGNOSIS SYSTEM  )

    B : REPLACE SIDE AIRBAG SENSOR ASSEMBLY RH  (See REMOVAL  )

    C: Go to next step 

  10. CHECK REAR AIRBAG SENSOR RH 
    1. Interchange the rear airbag sensor LH with RH and connect the connectors to them.
    2. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
    3. Turn the ignition switch to ON, and wait for at least 60 seconds.
    4. Clear the DTCs stored in the memory (see DTC CHECK / CLEAR  ).
    5. Turn the ignition switch to OFF.
    6. Turn the ignition switch to ON, and wait for at least 90 seconds.
    7. Check for DTCs (see DTC CHECK / CLEAR  ).
      Fig 4: Identifying Rear Airbag Sensor RH
      G04951010Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Result 

      RESULT CHART

      Result Proceed to
      DTC B1628 or B1648 is output A
      DTC B1623 or B1643 is output B
      DTC B1623, B1628, B1643 and B1648 are not output C

      HINT:

      Codes other than DTC B1623, B1628, B1643 and B1648 may be output at this time, but they are not related to this check.

    8. Turn the ignition switch to OFF.
    9. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
    10. Return the rear airbag sensor RH and LH to their original position and connect the connectors to them.

    A : REPLACE REAR AIRBAG SENSOR RH  (See REMOVAL  )

    B : REPLACE CENTER AIRBAG SENSOR ASSEMBLY  (See REMOVAL  )

    C : USE SIMULATION METHOD TO CHECK  (See DIAGNOSIS SYSTEM  )

  11. CHECK CONNECTION OF CONNECTORS 
    1. Turn the ignition switch to 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 and side airbag sensor LH.

      OK: 

      The connectors are properly connected. 

    NG : CONNECT CONNECTORS PROPERLY 

    OK: Go to next step 

  12. CHECK CONNECTORS 
    1. Disconnect the connectors from the center airbag sensor and side airbag sensor LH.
    2. Check that the connectors (on the center airbag sensor side and side airbag sensor LH side) are not damaged.

      OK: 

      The connectors are not deformed or damaged. 

    NG : REPLACE FLOOR WIRE 

    OK: Go to next step 

  13. CHECK FLOOR WIRE (CENTER AIRBAG SENSOR - SIDE AIRBAG SENSOR LH) 
    Fig 5: Checking Floor Wire (Center Airbag Sensor - Side Airbag Sensor LH)
    G05390240Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      TESTER CONNECTION SPECIFIED VOLTAGE CONDITION CHART

      Tester Connection Switch Condition Specified Condition
      H8-4 (BBL+) - Body ground Ignition switch ON Below 1 V
      H8-3 (BBL-) - Body ground Ignition switch ON Below 1 V
    4. Turn the ignition switch to OFF.
    5. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
    6. Using a service wire, connect terminals 8 (BBL+) and 15 (BBL-) of connector B.
      NOTE: Do not forcibly insert a service wire into the terminals of the connector when connecting the wire.
    7. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      H8-4 (BBL+) - H8-3 (BBL-) Always Below 1 Ω
    8. Disconnect the service wire from connector B.
    9. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED RESISTANCE CONDITION CHART

      Tester Connection Condition Specified Condition
      H8-4 (BBL+) - H8-3 (BBL-) Always 1 MΩ or higher
      H8-4 (BBL+) - Body ground Always 1 MΩ or higher
      H8-3 (BBL-) - Body ground Always 1 MΩ or higher

    NG : REPLACE FLOOR WIRE 

    OK: Go to next step 

  14. CHECK CONNECTION OF CONNECTOR 
    1. Check that the connector is properly connected to the rear airbag sensor LH.

      OK: 

      The connector is properly connected. 

    NG : CONNECT CONNECTORS PROPERLY 

    OK: Go to next step 

  15. CHECK CONNECTORS 
    1. Disconnect the connectors from the side airbag sensor LH and rear airbag sensor LH.
    2. Check that the connector (on the rear airbag sensor LH side) is not damaged.

      OK: 

      The connector is not deformed or damaged. 

    NG : REPLACE FLOOR WIRE 

    OK: Go to next step 

  16. CHECK FLOOR WIRE (SIDE AIRBAG SENSOR LH - REAR AIRBAG SENSOR LH) 
    Fig 6: Checking Floor Wire (Side Airbag Sensor LH - Rear Airbag Sensor LH)
    G05390241Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      TESTER CONNECTION SPECIFIED VOLTAGE CONDITION CHART

      Tester Connection Switch Condition Specified Condition
      H8-1 (BCL+) - Body ground Ignition switch ON Below 1 V
      H8-2 (BCL-) - Body ground Ignition switch ON Below 1 V
    4. Turn the ignition switch to OFF.
    5. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
    6. Using a service wire, connect terminals 2 (BCL+) and 1 (BCL-) of connector C.
      NOTE: Do not forcibly insert a service wire into the terminals of the connector when connecting the wire.
    7. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED RESISTANCE CONDITION CHART

      Tester Connection Condition Specified Condition
      H8-1 (BCL+) - H8-2 (BCL-) Always Below 1 Ω
    8. Disconnect the service wire from connector C.
    9. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED RESISTANCE CONDITION CHART

      Tester Connection Condition Specified Condition
      H8-1 (BCL+) - H8-2 (BCL-) Always 1 MΩ or higher
      H8-1 (BCL+) - Body ground Always 1 MΩ or higher
      H8-2 (BCL-) - Body ground Always 1 MΩ or higher

    NG : REPLACE FLOOR WIRE 

    OK: Go to next step 

  17. CHECK SIDE AIRBAG SENSOR LH 
    1. Interchange the side airbag sensor RH with LH and connect the connectors to them.
    2. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
    3. Turn the ignition switch to ON, and wait for at least 60 seconds.
    4. Clear the DTCs stored in the memory (see DTC CHECK / CLEAR  ).
    5. Turn the ignition switch to OFF.
    6. Turn the ignition switch to ON, and wait for at least 90 seconds.
    7. Check for DTCs (see DTC CHECK / CLEAR  ).
      Fig 7: Checking Side Airbag Sensor LH
      G05390233Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Result 

      RESULT CHART

      Result Proceed to
      DTC B1623 or B1643 is output A
      DTC B1623, B1628, B1643 and B1648 are not output B
      DTC B1628 or B1648 is output C
    8. Turn the ignition switch to OFF.
    9. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
    10. Return the side airbag sensor RH and LH to their original position and connect the connectors to them.

    A : REPLACE SIDE AIRBAG SENSOR ASSEMBLY LH  (See REMOVAL  )

    B : USE SIMULATION METHOD TO CHECK  (See DIAGNOSIS SYSTEM  )

    C: Go to next step 

  18. CHECK REAR AIRBAG SENSOR LH 
    1. Interchange the rear airbag sensor RH with LH and connect the connectors to them.
    2. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
    3. Turn the ignition switch to ON, and wait for at least 60 seconds.
    4. Clear the DTCs stored in the memory (see DTC CHECK / CLEAR  ).
    5. Turn the ignition switch to OFF.
    6. Turn the ignition switch to ON, and wait for at least 90 seconds.
    7. Check for DTCs (see DTC CHECK / CLEAR  ).
      Fig 8: Checking Rear Airbag Sensor LH
      G04951007Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Result 

      RESULT CHART

      Result Proceed to
      DTC B1628 or B1648 is output A
      DTC B1623 or B1643 is output B
      DTC B1623, B1628, B1643 and B1648 are not output C

      HINT:

      Codes other than DTC B1623, B1628, B1643 and B1648 may be output at this time, but they are not related to this check.

    8. Turn the ignition switch to OFF.
    9. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
    10. Return the rear airbag sensor RH and LH to their original position and connect the connectors to them.

    A : REPLACE CENTER AIRBAG SENSOR ASSEMBLY  (See REMOVAL  )

    B : REPLACE REAR AIRBAG SENSOR LH  (See REMOVAL  )

    C : USE SIMULATION METHOD TO CHECK  (See DIAGNOSIS SYSTEM  )

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