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Home >> Toyota >> 2011 >> Highlander Hybrid Limited >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 109 (Supplemental Restraint System (Diagnostic Codes & Symptom Tests)) >> Airbag System >> DTC B1815/54: Short in Front Passenger Side Squib 2nd Step Circuit; DTC B1816/54: Open in Front Passenger Side Squib 2nd Step Circuit; DTC B1817/54: Short to GND in Front Passenger Side Squib 2nd Step Circuit; DTC B1818/54: Short to B+ in Front Passenger Side Squib 2nd Step Circuit >> Procedure

DTC B1815/54: Short in Front Passenger Side Squib 2nd Step Circuit; DTC B1816/54: Open in Front Passenger Side Squib 2nd Step Circuit; DTC B1817/54: Short to GND in Front Passenger Side Squib 2nd Step Circuit; DTC B1818/54: Short to B+ in Front Passenger Side Squib 2nd Step Circuit: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK CONNECTORS 
    1. Turn the ignition switch off.
      Fig 1: Identifying Instrument Panel Wire & Connectors
      GTY301755Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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 front passenger airbag assembly and center airbag sensor assembly. Also check that the connectors that link the No. 2 instrument panel 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 front passenger airbag assembly and center airbag sensor assembly. Also disconnect the instrument panel wire from the No. 2 instrument panel wire.
    5. Check that the terminals of the connectors are not damaged.

      OK

      The terminals are not deformed or damaged.

    6. Check that the No. 2 instrument panel wire connector (on the front passenger airbag assembly side) is not damaged.

      OK

      The lock button is not disengaged, and the claw of the lock is not deformed or damaged.

    7. Check that the short springs for the No. 2 instrument panel wire and instrument panel wire with the activation prevention mechanism are not deformed or damaged.

      OK

      The short springs are not deformed or damaged.

    NG → REPLACE WIRE HARNESS 

    OK: Go to next step 

  2. CHECK FRONT PASSENGER AIRBAG ASSEMBLY (FRONT PASSENGER SIDE SQUIB 2ND STEP) 
    1. Connect the instrument panel wire to the No. 2 instrument panel wire and center airbag sensor assembly.
      Fig 2: Identifying Passenger Airbag Assembly (Front Passenger Side Squib 2nd Step)
      GTY302742Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Connect SST (resistance 2.1 Ω) to connector E (black connector).
      WARNING:

      Never connect the tester to the front passenger airbag assembly (front passenger side squib 2nd step) for measurement, as this may lead to a serious injury due to airbag deployment.

      NOTE:
      • Do not forcibly insert SST into the terminals of the connector when connecting.
      • Insert SST straight into the terminals of the connector.
      • SST: 09843-18061 
    3. Connect the cable to the negative (-) battery terminal.
    4. Turn the ignition switch on (IG), 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 on (IG), and wait for at least 60 seconds.
    8. Check for DTCs, refer to DTC CHECK / CLEAR .

      OK

      DTC B1815, B1816, B1817, B1818 or 54 is not output.

      HINT: 

      Codes other than DTCs B1815, B1816, B1817, B1818 and 54 may be output at this time, but they are not related to this check.

    NG → See step   4 

    OK → See step   3 

  3. REPLACE FRONT PASSENGER AIRBAG ASSEMBLY. Refer to  REMOVAL 
  4. CHECK FRONT PASSENGER SIDE SQUIB 2ND STEP CIRCUIT 
    1. Turn the ignition switch off.
      Fig 3: Identifying Front Passenger Side Squib 2ND Step Circuit
      GTY168464Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Disconnect SST from connector E.
    4. Disconnect the instrument panel wire from the center airbag sensor assembly.
    5. Check for a short to B+ in the circuit.
      1. Connect the cable to the negative (-) battery terminal.
      2. Turn the ignition switch on (IG).
      3. Measure the voltage according to the value(s) in the table below.

        Standard Voltage

        Tester Connection Switch Condition Specified Condition
        e1-2 (P2+) - Body ground Ignition switch on (IG) Below 1 V
        e1-1 (P2-) - Body ground Ignition switch on (IG) Below 1 V
    6. Check for an open in the circuit.
      1. Turn the ignition switch off.
      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
        e1-2 (P2+) - e1-1 (P2-) Always Below 1 Ω
    7. Check for a short to ground in the circuit.
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        e1-2 (P2+) - Body ground Always 1 MΩ or higher
        e1-1 (P2-) - Body ground Always 1 MΩ or higher
    8. Check for a short in the circuit.
      1. Release the activation prevention mechanism built into connector B, refer to DIAGNOSIS SYSTEM .
      2. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        e1-2 (P2+) - e1-1 (P2-) Always 1 MΩ or higher

    NG → See step   6 

    OK: Go to next step 

  5. CHECK CENTER AIRBAG SENSOR ASSEMBLY 
    1. Restore the released activation prevention mechanism of connector B to the original condition.
      Fig 4: Identifying Center Airbag Sensor Assembly
      GTY294449Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Connect the connectors to the front passenger airbag assembly and center airbag sensor assembly.
    3. Connect the cable to the negative (-) battery terminal.
    4. Turn the ignition switch on (IG), 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 on (IG), and wait for at least 60 seconds.
    8. Check for DTCs, refer to DTC CHECK / CLEAR .

      OK

      DTC B1815, B1816, B1817, B1818 or 54 is not output.

      HINT: 

      Codes other than DTCs B1815, B1816, B1817, B1818 and 54 may be output at this time, but they are not related to this check.

    NG → See step   8 

    OK → See step   9 

  6. CHECK INSTRUMENT PANEL WIRE 
    1. Restore the released activation prevention mechanism of connector B to the original condition.
      Fig 5: Identifying Instrument Panel Wire
      GTY204299Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the No. 2 instrument panel wire from the instrument panel wire.
    3. Check for a short to B+ in the circuit.
      1. Connect the cable to the negative (-) battery terminal.
      2. Turn the ignition switch on (IG).
      3. Measure the voltage according to the value(s) in the table below.

        Standard Voltage

        Tester Connection Switch Condition Specified Condition
        De1-3 (P2+) - Body ground Ignition switch on (IG) Below 1 V
        De1-4 (P2-) - Body ground Ignition switch on (IG) Below 1 V
    4. Check for an open in the circuit.
      1. Turn the ignition switch off.
      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
        De1-3 (P2+) - De1-4 (P2-) Always Below 1 Ω
    5. Check for a short to ground in the circuit.
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        De1-3 (P2+) - Body ground Always 1 MΩ or higher
        De1-4 (P2-) - Body ground Always 1 MΩ or higher
    6. Check for a short in the circuit.
      1. Release the activation prevention mechanism built into connector B, refer to DIAGNOSIS SYSTEM .
      2. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        De1-3 (P2+) - De1-4 (P2-) Always 1 MΩ or higher

    NG → REPLACE INSTRUMENT PANEL WIRE 

    OK: Go to next step 

  7. CHECK NO. 2 INSTRUMENT PANEL WIRE 
    1. Check for a short to B+ in the circuit.
      Fig 6: Checking Instrument Panel Wire Assembly
      GTY204521Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Connect the cable to the negative (-) battery terminal.
      2. Turn the ignition switch on (IG).
      3. Measure the voltage according to the value(s) in the table below.

        Standard Voltage

        Tester Connection Switch Condition Specified Condition
        e1-2 (P2+) - Body ground Ignition switch on (IG) Below 1 V
        e1-1 (P2-) - Body ground Ignition switch on (IG) Below 1 V
    2. Check for an open in the circuit.
      1. Turn the ignition switch off.
      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
        e1-2 (P2+) - e1-1 (P2-) Always Below 1 Ω
    3. Check for a short to ground in the circuit.
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        e1-2 (P2+) - Body ground Always 1 MΩ or higher
        e1-1 (P2-) - Body ground Always 1 MΩ or higher
    4. Check for a short in the circuit.
      1. Release the activation prevention mechanism built into connector D, refer to DIAGNOSIS SYSTEM .
      2. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        e1-2 (P2+) - e1-1 (P2-) Always 1 MΩ or higher

    NG → REPLACE NO. 2 INSTRUMENT PANEL WIRE 

    OK → See step   9 

  8. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to  REMOVAL 
  9. USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING 
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