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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 B1615/14: Front Airbag Sensor LH Circuit Malfunction >> Procedure

DTC B1615/14: Front 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 center airbag sensor assembly and the front airbag sensor LH. Also check that the connectors that link the engine room main wire and instrument panel wire are properly connected.

      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 center airbag sensor assembly and the front airbag sensor LH. Also disconnect the connectors that link the engine room main wire and instrument panel wire.
    5. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

    NG → REPLACE WIRE HARNESS 

    OK: Go to next step 

  2. CHECK FRONT AIRBAG SENSOR LH CIRCUIT (OPEN) 
    1. Connect the connectors that link the engine room main wire and instrument panel wire.
      Fig 1: Checking Front Airbag Sensor LH Circuit Using SST (Open)
      GTY226131Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Using SST, connect connectors 30 (+SL) and 28 (-SL) of connector B.
      NOTE:

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

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      A6-2 (+SL) - A6-1 (-SL) Always Below 1 Ω

    NG → See step   7 

    OK: Go to next step 

  3. CHECK FRONT AIRBAG SENSOR LH CIRCUIT (SHORT) 
    1. Disconnect SST from connector B.
      Fig 2: Checking Front Airbag Sensor LH Circuit And A6 Connector Terminal
      GTY243802Courtesy 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
      A6-2 (+SL) - A6-1 (-SL) Always 1 MΩ or higher

    NG → See step   8 

    OK: Go to next step 

  4. CHECK FRONT AIRBAG SENSOR LH CIRCUIT (SHORT TO B+) 
    1. Connect the cable to the negative (-) battery terminal.
      Fig 3: Checking Front Airbag Sensor LH Circuit And A6 Connector Terminal
      GTY243802Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      A6-2 (+SL) - Body ground Ignition switch ON Below 1 V
      A6-1 (-SL) - Body ground Ignition switch ON Below 1 V

    NG → See step   9 

    OK: Go to next step 

  5. CHECK FRONT AIRBAG SENSOR LH CIRCUIT (SHORT TO GROUND) 
    1. Turn the ignition switch off.
      Fig 4: Checking Front Airbag Sensor LH Circuit And A6 Connector Terminal
      GTY243802Courtesy 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
      A6-2 (+SL) - Body ground Always 1 MΩ or higher
      A6-1 (-SL) - Body ground Always 1 MΩ or higher

    NG → See step   10 

    OK: Go to next step 

  6. CHECK FRONT AIRBAG SENSOR LH 
    1. Connect the connector to the center airbag sensor assembly.
      Fig 5: Checking Front Airbag Sensor
      GTY129934Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Interchange the front 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 B1610/13 and B1615/14 are not output. A
      DTC B1610/13 is output. B
      DTC B1615/14 is output. C

      HINT: 

      Codes other than DTC B1610/13 and B1615/14 may be output at this time, but they are not related to this check.

    B → See step   13 

    C → See step   12 

    A → See step   11 

  7. CHECK INSTRUMENT PANEL WIRE (OPEN) 
    1. Disconnect the instrument panel wire connector from the engine room main wire.
      Fig 6: Checking Instrument Panel Wire Using SST (Open)
      GTY222643Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT: 

      SST 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
      AE3-1 (+SL) - AE3-2 (-SL) Always Below 1 Ω

    NG → REPLACE INSTRUMENT PANEL WIRE 

    OK → REPLACE ENGINE ROOM MAIN WIRE 

  8. CHECK INSTRUMENT PANEL WIRE (SHORT) 
    1. Disconnect the instrument panel wire connector from the engine room main wire.
      Fig 7: Checking Instrument Panel Wire Circuit And AE3 Connector Terminals
      GTY227765Courtesy 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
      AE3-1 (+SL) - AE3-2 (-SL) Always 1 MΩ or higher

    NG → REPLACE INSTRUMENT PANEL WIRE 

    OK → REPLACE ENGINE ROOM MAIN WIRE 

  9. CHECK INSTRUMENT PANEL WIRE (SHORT TO B+) 
    1. Turn the ignition switch off.
      Fig 8: Checking Instrument Panel Wire Circuit And AE3 Connector Terminals
      GTY227765Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Disconnect the instrument panel wire connector from the engine room main wire.
    4. Connect the cable to the negative (-) battery terminal.
    5. Turn the ignition switch to ON.
    6. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      AE3-1 (+SL) - Body ground Ignition switch ON Below 1 V
      AE3-2 (-SL) - Body ground Ignition switch ON Below 1 V

    NG → REPLACE INSTRUMENT PANEL WIRE 

    OK → REPLACE ENGINE ROOM MAIN WIRE 

  10. CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND) 
    1. Disconnect the instrument panel wire connector from the engine room main wire.
      Fig 9: Checking Instrument Panel Wire Circuit And AE3 Connector Terminals
      GTY227765Courtesy 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
      AE3-1 (+SL) - Body ground Always 1 MΩ or higher
      AE3-2 (-SL) - Body ground Always 1 MΩ or higher

    NG → REPLACE INSTRUMENT PANEL WIRE 

    OK → REPLACE ENGINE ROOM MAIN WIRE 

  11. USE SIMULATION METHOD TO CHECK. Refer to  DIAGNOSIS SYSTEM 
  12. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to  REMOVAL 
  13. REPLACE FRONT AIRBAG SENSOR LH. Refer to  REMOVAL 
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