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Home >> Toyota >> 2018 >> 4Runner TRD Pro >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Airbag System - Diagnostic Codes (B1690-B1905) & Symptom Tests >> Airbag System >> DTC B1810-53: Short in Driver Side Squib 2nd Step Circuit; DTC B1811-53: Open in Driver Side Squib 2nd Step Circuit; DTC B1812-53: Short to GND in Driver Side Squib 2nd Step Circuit; DTC B1813-53: Short to B+ in Driver Side Squib 2nd Step Circuit [08/2015 - 08/2019] >> Procedure

DTC B1810-53: Short in Driver Side Squib 2nd Step Circuit; DTC B1811-53: Open in Driver Side Squib 2nd Step Circuit; DTC B1812-53: Short to GND in Driver Side Squib 2nd Step Circuit; DTC B1813-53: Short to B+ in Driver Side Squib 2nd Step Circuit [08/2015 - 08/2019]: Procedure

  1. CHECK STEERING PAD (DRIVER SIDE SQUIB 2ND STEP) 
    1. Turn the ignition switch off.
      GTY714877Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Disconnect the connectors from the steering pad.
    4. Connect the white wire side of SST (resistance: 2.1 Ω) to connector E (black connector).
      WARNING:

      Never connect the tester to the steering pad (driver 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 SST.
      • Insert SST straight into the terminals of the connector.
      • SST: 09843-18061 
    5. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
    6. Turn the ignition switch to ON, and wait for at least 60 seconds.
    7. Clear the DTCs (Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] ).
    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 [08/2015 - 08/2019] ).

      OK

      DTC B1810, B1811, B1812 or B1813 is not output.

      HINT: 

      Codes other than DTC B1810, B1811, B1812 and B1813 may be output at this time, but they are not related to this check.

      TEXT IN ILLUSTRATION

      *1 Driver Side Squib 2nd Step
      *2 Spiral Cable
      *3 Center Airbag Sensor
      *4 Connector E
      *5 SST
      *a Front view of wire harness connector
      (to Driver Side Squib 2nd Step)
      *b Color: Black

    Result: 

    OK 

    REPLACE STEERING PAD 

    (Refer to REMOVAL [08/2015 - ] )

    Result: 

    NG 

    See step  2

  2. CHECK CONNECTOR 
    1. Turn the ignition switch off.
    2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    3. Disconnect SST from connector E.
    4. Check that the spiral cable connectors (on the steering pad side) are not damaged.

      OK

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

      GTY636315Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Driver Side Squib 2nd Step
      *2 Spiral Cable
      *3 Center Airbag Sensor

    Result: 

    NG 

    REPLACE SPIRAL CABLE SUB-ASSEMBLY 

    (Refer to REMOVAL [08/2015 - ] )

    Result: 

    OK 

    See step  3

  3. CHECK DRIVER SIDE SQUIB 2ND STEP CIRCUIT 
    GTY726533Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the connectors from the center airbag sensor.
    2. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      z13-2 (D2+) - Body ground Ignition switch ON Below 1 V
      z13-1 (D2-) - Body ground Ignition switch ON Below 1 V
    4. Turn the ignition switch off.
    5. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    6. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      z13-2 (D2+) - z13-1 (D2-) Always Below 1 Ω
    7. Release the activation prevention mechanism built into connector B (Refer to DIAGNOSIS SYSTEM [08/2015 - 08/2019] ).
    8. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      z13-2 (D2+) - z13-1 (D2-) Always 1 MΩ or higher
      z13-2 (D2+) - Body ground Always 1 MΩ or higher
      z13-1 (D2-) - Body ground Always 1 MΩ or higher
      TEXT IN ILLUSTRATION

      *1 Driver Side Squib 2nd Step
      *2 Spiral Cable
      *3 Center Airbag Sensor
      *4 Connector E
      *a Front view of wire harness connector
      (to Driver Side Squib 2nd Step)
      *b Color: Black

    Result: 

    NG 

    See step  5

    Result: 

    OK 

    See step  4

  4. CHECK CENTER AIRBAG SENSOR 
    1. Connect the connectors to the steering pad and center airbag sensor.
      GTY695428Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Connect the cable to the negative (-) battery terminal, 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 (Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] ).
    5. Turn the ignition switch off.
    6. Turn the ignition switch to ON, and wait for at least 60 seconds.
    7. Check for DTCs (Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] ).

      OK

      DTC B1810, B1811, B1812 or B1813 is not output.

      HINT: 

      Codes other than DTC B1810, B1811, B1812 and B1813 may be output at this time, but they are not related to this check.

      TEXT IN ILLUSTRATION

      *1 Driver Side Squib 2nd Step
      *2 Spiral Cable
      *3 Center Airbag Sensor

    Result: 

    OK 

    USE SIMULATION METHOD TO CHECK 

    (Refer to DIAGNOSIS SYSTEM [08/2015 - 08/2019] )

    Result: 

    NG 

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY 

    (Refer to REMOVAL [08/2015 - ] )

  5. CHECK INSTRUMENT PANEL WIRE (CENTER AIRBAG SENSOR - SPIRAL CABLE) 
    1. Restore the released activation prevention mechanism of connector B to its original condition.
      GTY694492Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the instrument panel wire connector from the spiral cable.
    3. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
    4. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      F24-4 (D2+) - Body ground Ignition switch ON Below 1 V
      F24-3 (D2-) - Body ground Ignition switch ON Below 1 V
    5. Turn the ignition switch off.
    6. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    7. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      F24-4 (D2+) - F24-3 (D2-) Always Below 1 Ω
    8. Release the activation prevention mechanism built into connector B (Refer to DIAGNOSIS SYSTEM [08/2015 - 08/2019] ).
    9. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      F24-4 (D2+) - F24-3 (D2-) Always 1 MΩ or higher
      F24-4 (D2+) - Body ground Always 1 MΩ or higher
      F24-3 (D2-) - Body ground Always 1 MΩ or higher
      TEXT IN ILLUSTRATION

      *1 Instrument Panel Wire
      *2 Spiral Cable
      *3 Center Airbag Sensor
      *4 Connector C
      *5 SST
      *a Rear view of wire harness connector
      (to Spiral Cable)

    Result: 

    OK 

    REPLACE SPIRAL CABLE SUB-ASSEMBLY 

    (Refer to REMOVAL [08/2015 - ] )

    Result: 

    NG 

    REPLACE INSTRUMENT PANEL WIRE 

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