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Home >> Toyota >> 2011 >> Matrix S, FWD, Automatic >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Supplemental Restraint System (Diagnostic Codes (B1000 - B1974) & Symptom Tests) >> Airbag System >> DTC B1635/24: Rear Airbag Sensor LH Circuit Malfunction >> Procedure

DTC B1635/24: Rear Airbag Sensor LH Circuit Malfunction: Procedure

  1. CHECK CONNECTORS 
    1. Turn the ignition switch off.
    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Check that the connectors are properly connected to the side airbag sensor LH and the rear airbag sensor LH.

      OK

      The connectors are properly connected.

      HINT: 

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

    4. Disconnect the connectors from the side airbag sensor LH and rear airbag sensor LH.
    5. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

    NG → REPLACE FLOOR WIRE 

    OK: Go to next step 

  2. CHECK FLOOR WIRE (OPEN) 
    1. Using SST, connect terminals 2 (BCL+) and 1 (BCL-) of connector C.
      Fig 1: Checking Floor Wire Using SST (Open)
      GTY217279Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:

      Do not forcibly insert SST into the terminals of the connector.

      • SST: 09843-18040 
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      L6-1 (BCL+) - L6-2 (BCL-) Always Below 1 Ω

    NG → REPLACE FLOOR WIRE 

    OK: Go to next step 

  3. CHECK FLOOR WIRE (SHORT TO B+) 
    1. Disconnect SST from connector C.
      Fig 2: Checking Floor Wire And L6 Connector Terminals
      GTY243803Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Connect the cable to the negative (-) battery terminal.
    3. Turn the ignition switch to ON.
    4. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      L6-1 (BCL+) - Body ground Ignition switch ON Below 1 V
      L6-2 (BCL-) - Body ground Ignition switch ON Below 1 V

    NG → REPLACE FLOOR WIRE 

    OK: Go to next step 

  4. CHECK FLOOR WIRE (SHORT TO GROUND) 
    1. Turn the ignition switch off.
      Fig 3: Checking Floor Wire And L6 Connector Terminals
      GTY243803Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the cable from the negative (-) battery terminal, 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
      L6-1 (BCL+) - Body ground Always 1 MΩ or higher
      L6-2 (BCL-) - Body ground Always 1 MΩ or higher

    NG → REPLACE FLOOR WIRE 

    OK: Go to next step 

  5. CHECK REAR AIRBAG SENSOR LH 
    1. Connect the connector to the side airbag sensor LH.
      Fig 4: Checking Rear Airbag Sensor
      GTY182440Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Interchange the rear airbag sensor RH with LH and connect the connectors.
    3. Connect the cable to the negative (-) battery terminal.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.
    5. Clear the DTCs stored in the memory. Refer to DTC CHECK / CLEAR .
    6. Turn the ignition switch off.
    7. Turn the ignition switch to ON, and wait for at least 60 seconds.
    8. Check for DTCs. Refer to DTC CHECK / CLEAR .

      Result

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

      HINT: 

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

    B → See step   8 

    C → See step   7 

    A: Go to next step 

  6. CHECK SIDE AIRBAG SENSOR LH 
    1. Turn the ignition switch off.
      Fig 5: Checking Side Airbag Sensor
      GTY176805Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Return the rear airbag sensors RH and LH to their original positions and connect the connectors.
    4. Interchange the side airbag sensor RH with LH and connect the connectors.
    5. Connect the cable to the negative (-) battery terminal.
    6. Turn the ignition switch to ON, and wait for at least 60 seconds.
    7. Clear the DTCs stored in the memory. Refer to DTC CHECK / CLEAR .
    8. Turn the ignition switch off.
    9. Turn the ignition switch to ON, and wait for at least 60 seconds.
    10. Check for DTCs. Refer to DTC CHECK / CLEAR .

      Result

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

      HINT: 

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

    B → See step   10 

    C → See step   9 

    A → See step   7 

  7. USE SIMULATION METHOD TO CHECK. Refer to  DIAGNOSIS SYSTEM 
  8. REPLACE REAR AIRBAG SENSOR LH. Refer to  REMOVAL 
  9. REPLACE SIDE AIRBAG SENSOR LH. Refer to  REMOVAL 
  10. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to  REMOVAL 
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