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Home >> Toyota >> 2017 >> Avalon XLE >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Supplemental Restraint System - Diagnostic Codes & Symptom Tests - (Except Hybrid) >> Airbag System >> DTC B1635/24: Rear Airbag Sensor LH Circuit Malfunction [10/2014 - ] >> Procedure

DTC B1635/24: Rear Airbag Sensor LH Circuit Malfunction [10/2014 - ]: Procedure

  1. CHECK CONNECTORS 
    1. Turn the engine switch off.
    2. Disconnect the cable from the negative (-) battery terminal.
      WARNING:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

    3. Check that the connectors are properly connected to the side airbag sensor assembly LH, side No. 2 airbag sensor assembly LH and door side airbag sensor LH. Also check that the connectors that link the floor wire and front door wire LH are properly connected.

      OK

      The connectors are properly connected.

      HINT: 

      If the connectors are not properly connected, reconnect the connectors and proceed to the next inspection.

    4. Disconnect the connectors from the side airbag sensor assembly LH, side No. 2 airbag sensor assembly LH and door side airbag sensor LH. Also disconnect the connectors that link the floor wire and front door wire LH.
    5. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

    Result: 

    NG 

    REPLACE WIRE HARNESS 

    Result: 

    OK 

    See step  2

  2. CHECK FLOOR WIRE (OPEN) 
    1. Using a service wire, connect terminals 4 (BCL+) and 3 (BCL-) of connector C.
      GTY546836Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Side No. 2 Airbag Sensor Assembly LH
      *2 Side Airbag Sensor Assembly LH
      *3 Floor Wire
      *4 Service Wire
      *a Front view of wire harness connector
      (to Side Airbag Sensor Assembly LH)
      *b Front view of wire harness connector
      (to Side No. 2 Airbag Sensor Assembly LH)
      NOTE:

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

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      J6-1 (BCL+) - J6-2 (BCL-) Always Below 1 Ω
    3. Disconnect the service wire from connector C.

    Result: 

    NG 

    REPLACE FLOOR WIRE 

    Result: 

    OK 

    See step  3

  3. CHECK FLOOR WIRE (SHORT) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY581776Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Side No. 2 Airbag Sensor Assembly LH
      *2 Side Airbag Sensor Assembly LH
      *3 Floor Wire
      *a Front view of wire harness connector
      (to Side Airbag Sensor Assembly LH)

      Standard Resistance

      Tester Connection Condition Specified Condition
      J6-1 (BCL+) - J6-2 (BCL-) Always 1 MΩ or higher

    Result: 

    NG 

    REPLACE FLOOR WIRE 

    Result: 

    OK 

    See step  4

  4. CHECK FLOOR WIRE (SHORT TO B+) 
    1. Connect the cable to the negative (-) battery terminal.
      GTY581776Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Side No. 2 Airbag Sensor Assembly LH
      *2 Side Airbag Sensor Assembly LH
      *3 Floor Wire
      *a Front view of wire harness connector
      (to Side Airbag Sensor Assembly LH)
    2. Turn the engine switch on (IG).
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      J6-1 (BCL+) - Body ground Engine switch on (IG) Below 1 V
      J6-2 (BCL-) - Body ground Engine switch on (IG) Below 1 V
    4. Turn the engine switch off.
    5. Disconnect the cable from the negative (-) battery terminal.
      WARNING:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

    Result: 

    NG 

    REPLACE FLOOR WIRE 

    Result: 

    OK 

    See step  5

  5. CHECK FLOOR WIRE (SHORT TO GROUND) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY581776Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Side No. 2 Airbag Sensor Assembly LH
      *2 Side Airbag Sensor Assembly LH
      *3 Floor Wire
      *a Front view of wire harness connector
      (to Side Airbag Sensor Assembly LH)

      Standard Resistance

      Tester Connection Condition Specified Condition
      J6-1 (BCL+) - Body ground Always 1 MΩ or higher
      J6-2 (BCL-) - Body ground Always 1 MΩ or higher

    Result: 

    NG 

    REPLACE FLOOR WIRE 

    Result: 

    OK 

    See step  6

  6. CHECK WIRE HARNESS (OPEN) 
    1. Connect the connectors that link the floor wire and front door wire LH.
      GTY563529Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Door Side Airbag Sensor LH
      *2 Side No. 2 Airbag Sensor Assembly LH
      *3 Service Wire
      *a Front view of wire harness connector
      (to Side No. 2 Airbag Sensor Assembly LH)
      *b Front view of wire harness connector
      (to Door Side Airbag Sensor LH)
    2. Using a service wire, connect terminals 2 (BDL+) and 1 (BDL-) of connector E.
      NOTE:

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

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      J10-1 (BDL+) - J10-2 (BDL-) Always Below 1 Ω

    Result: 

    NG 

    See step  13

    Result: 

    OK 

    See step  7

  7. CHECK WIRE HARNESS (SHORT) 
    1. Disconnect the service wire from connector E.
      GTY541943Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Door Side Airbag Sensor LH
      *2 Side No. 2 Airbag Sensor Assembly LH
      *a Front view of wire harness connector
      (to Side No. 2 Airbag Sensor Assembly LH)
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      J10-1 (BDL+) - J10-2 (BDL-) Always 1 MΩ or higher

    Result: 

    NG 

    See step  14

    Result: 

    OK 

    See step  8

  8. CHECK WIRE HARNESS (SHORT TO B+) 
    1. Connect the cable to the negative (-) battery terminal.
      GTY541943Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Door Side Airbag Sensor LH
      *2 Side No. 2 Airbag Sensor Assembly LH
      *a Front view of wire harness connector
      (to Side No. 2 Airbag Sensor Assembly LH)
    2. Turn the engine switch on (IG).
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      J10-1 (BDL+) - Body ground Engine switch on (IG) Below 1 V
      J10-2 (BDL-) - Body ground Engine switch on (IG) Below 1 V
    4. Turn the engine switch off.
    5. Disconnect the cable from the negative (-) battery terminal.
      WARNING:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

    Result: 

    NG 

    See step  15

    Result: 

    OK 

    See step  9

  9. CHECK WIRE HARNESS (SHORT TO GROUND) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY541943Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Door Side Airbag Sensor LH
      *2 Side No. 2 Airbag Sensor Assembly LH
      *a Front view of wire harness connector
      (to Side No. 2 Airbag Sensor Assembly LH)

      Standard Resistance

      Tester Connection Condition Specified Condition
      J10-1 (BDL+) - Body ground Always 1 MΩ or higher
      J10-2 (BDL-) - Body ground Always 1 MΩ or higher

    Result: 

    NG 

    See step  16

    Result: 

    OK 

    See step  10

  10. CHECK SIDE NO. 2 AIRBAG SENSOR ASSEMBLY LH 
    1. Connect the connectors to the side airbag sensor assembly LH and door side airbag sensor LH.
      GTY579902Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Side No. 2 Airbag Sensor Assembly RH
      *2 Side Airbag Sensor Assembly LH
    2. Interchange the side No. 2 airbag sensor assembly LH with RH and connect the connectors.
    3. Connect the cable to the negative (-) battery terminal.
    4. Clear the DTCs stored in memory (Refer to DTC CHECK / CLEAR [10/2014 - ] ).
    5. Turn the engine switch off.
    6. Turn the engine switch on (IG), and wait for at least 60 seconds.
    7. Check for DTCs (Refer to DTC CHECK / CLEAR [10/2014 - ] ).

      Result

      Result Proceed to
      DTC B1635/24 is output. A
      DTC B1630/23 is output. B
      DTCs B1630/23 and B1635/24 are not output. C

      HINT: 

      Codes other than DTCs B1630/23 and B1635/24 may be output at this time, but they are not related to this check.

    8. Turn the engine switch off.
    9. Disconnect the cable from the negative (-) battery terminal.
      WARNING:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

    10. Return the side No. 2 airbag sensor assembly LH and RH to their original positions and connect the connectors.

    Result: 

    B 

    REPLACE SIDE NO. 2 AIRBAG SENSOR ASSEMBLY LH 

    (Refer to REMOVAL [10/2014 - ] )

    Result: 

    C 

    USE SIMULATION METHOD TO CHECK 

    (Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 10/2015] or HOW TO PROCEED WITH TROUBLESHOOTING [10/2015 - ] )

    Result: 

    A 

    See step  11

  11. CHECK SIDE AIRBAG SENSOR ASSEMBLY LH 
    1. Interchange the side airbag sensor assembly LH with RH and connect the connectors.
      GTY381346Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Side Airbag Sensor Assembly RH
      *2 Airbag ECU Assembly
    2. Connect the cable to the negative (-) battery terminal.
    3. Clear the DTCs stored in memory (Refer to DTC CHECK / CLEAR [10/2014 - ] ).
    4. Turn the engine switch off.
    5. Turn the engine switch on (IG), and wait for at least 60 seconds.
    6. Check for DTCs (Refer to DTC CHECK / CLEAR [10/2014 - ] ).

      Result

      Result Proceed to
      DTC B1635/24 is output. A
      DTC B1630/23 is output. B
      DTCs B1630/23 and B1635/24 are not output. C

      HINT: 

      Codes other than DTCs B1630/23 and B1635/24 may be output at this time, but they are not related to this check.

    7. Turn the engine switch off.
    8. Disconnect the cable from the negative (-) battery terminal.
      WARNING:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

    9. Return the side airbag sensor assembly LH and RH to their original positions and connect the connectors.

    Result: 

    B 

    REPLACE SIDE AIRBAG SENSOR ASSEMBLY LH 

    (Refer to REMOVAL [10/2014 - ] )

    Result: 

    C 

    USE SIMULATION METHOD TO CHECK 

    (Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 10/2015] or HOW TO PROCEED WITH TROUBLESHOOTING [10/2015 - ] )

    Result: 

    A 

    See step  12

  12. CHECK DOOR SIDE AIRBAG SENSOR LH 
    1. Disconnect the connector from the door side airbag sensor LH.
      GTY594786Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Door Side Airbag Sensor LH
      *2 Side No. 2 Airbag Sensor Assembly LH
    2. Connect the cable to the negative (-) battery terminal.
    3. Clear the DTCs stored in memory (Refer to DTC CHECK / CLEAR [10/2014 - ] ).
    4. Turn the engine switch off.
    5. Turn the engine switch on (IG), and wait for at least 60 seconds.
    6. Check for DTCs (Refer to DTC CHECK / CLEAR [10/2014 - ] ).

      OK

      DTC B1635/24 is not output.

      HINT: 

      Codes other than DTC B1635/24 may be output at this time, but they are not related to this check.

    Result: 

    OK 

    REPLACE DOOR SIDE AIRBAG SENSOR LH 

    (Refer to REMOVAL [10/2014 - ] )

    Result: 

    NG 

    REPLACE AIRBAG ECU ASSEMBLY 

    (Refer to REMOVAL [10/2014 - ] )

  13. CHECK FRONT DOOR WIRE LH (OPEN) 
    1. Disconnect the front door wire LH connector from the floor wire.
      GTY566070Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Door Side Airbag Sensor LH
      *2 Side No. 2 Airbag Sensor Assembly LH
      *3 Front Door Wire LH
      *4 Floor Wire
      *5 Service Wire
      *a Front view of wire harness connector
      (to Floor Wire)
      *b Front view of wire harness connector
      (to Door Side Airbag Sensor LH)

      HINT: 

      The service wire has already been inserted into connector E.

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      GJ1-1 (BDL+) - GJ1-2 (BDL-) Always Below 1 Ω
    3. Disconnect the service wire from connector E.

    Result: 

    OK 

    REPLACE FLOOR WIRE 

    Result: 

    NG 

    REPLACE FRONT DOOR WIRE LH 

  14. CHECK FRONT DOOR WIRE LH (SHORT) 
    1. Disconnect the front door wire LH connector from the floor wire.
      GTY575020Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Door Side Airbag Sensor LH
      *2 Side No. 2 Airbag Sensor Assembly LH
      *3 Front Door Wire LH
      *4 Floor Wire
      *a Front view of wire harness connector
      (to Floor Wire)
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      GJ1-1 (BDL+) - GJ1-2 (BDL-) Always 1 MΩ or higher

    Result: 

    OK 

    REPLACE FLOOR WIRE 

    Result: 

    NG 

    REPLACE FRONT DOOR WIRE LH 

  15. CHECK FRONT DOOR WIRE LH (SHORT TO B+) 
    1. Disconnect the front door wire LH connector from the floor wire.
      GTY575020Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Door Side Airbag Sensor LH
      *2 Side No. 2 Airbag Sensor Assembly LH
      *3 Front Door Wire LH
      *4 Floor Wire
      *a Front view of wire harness connector
      (to Floor Wire)
    2. Connect the cable to the negative (-) battery terminal.
    3. Turn the engine switch on (IG).
    4. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      GJ1-1 (BDL+) - Body ground Engine switch on (IG) Below 1 V
      GJ1-2 (BDL-) - Body ground Engine switch on (IG) Below 1 V

    Result: 

    OK 

    REPLACE FLOOR WIRE 

    Result: 

    NG 

    REPLACE FRONT DOOR WIRE LH 

  16. CHECK FRONT DOOR WIRE LH (SHORT TO GROUND) 
    1. Disconnect the front door wire LH connector from the floor wire.
      GTY575020Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Door Side Airbag Sensor LH
      *2 Side No. 2 Airbag Sensor Assembly LH
      *3 Front Door Wire LH
      *4 Floor Wire
      *a Front view of wire harness connector
      (to Floor Wire)
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      GJ1-1 (BDL+) - Body ground Always 1 MΩ or higher
      GJ1-2 (BDL-) - Body ground Always 1 MΩ or higher

    Result: 

    OK 

    REPLACE FLOOR WIRE 

    Result: 

    NG 

    REPLACE FRONT DOOR WIRE LH 

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