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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Airbag System - Diagnostic Codes (3 Of 7) >> Airbag System >> DTC B0029-12: Right Curtain Deployment Control 1 Circuit Short to Battery [11/2023 - ] >> Procedure

DTC B0029-12: Right Curtain Deployment Control 1 Circuit Short to Battery [11/2023 - ]: Procedure

  1. CLEAR DTC 

    Pre-procedure1

    1. Turn the ignition switch to ON, and wait for at least 60 seconds.

      Procedure1

    2. Clear the DTCs stored in memory.

      Body Electrical > SRS Airbag > Clear DTCs 

      Result

      Proceed to
      NEXT

      Post-procedure1

    3. Turn the ignition switch off.

    Result: 

    NEXT 

    See step  2

  2. CHECK DTC 

    Pre-procedure1

    1. Turn the ignition switch to ON, and wait for at least 60 seconds.

      Procedure1

    2. Check for DTCs.

      Body Electrical > SRS Airbag > Trouble Codes 

      Result

      Result Proceed to
      B0029-12 is output A
      B0029-12 is not output B

      Post-procedure1

    3. None

    Result: 

    B 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ] 

    Result: 

    A 

    See step  3

  3. CHECK CONNECTION OF CONNECTORS 

    Pre-procedure1

    1. Turn the ignition switch off.
    2. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 60 seconds.

      Procedure1

    3. Check that the connectors are properly connected to the curtain shield airbag assembly RH and airbag sensor assembly.

      OK

      The connectors are properly connected.

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    4. None

    Result: 

    NG 

    CONNECT CONNECTORS PROPERLY 

    Result: 

    OK 

    See step  4

  4. CHECK CONNECTORS 

    Pre-procedure1

    1. Disconnect the airbag sensor assembly connector.
      GTY972907Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Curtain Shield Airbag Assembly RH
      *2 Airbag Sensor Assembly
      *3 Wire Harness
    2. Disconnect the curtain shield airbag assembly RH connector.

      Procedure1

    3. Check that the terminals of the connectors are not deformed or damaged.

      OK

      The terminals are not deformed or damaged.

    4. Check that the connectors are not loose, deformed or damaged.

      OK

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

    5. Check that the short springs of the activation prevention mechanism of the wire harness connector are not deformed or damaged.

      OK

      The short springs are not deformed or damaged.

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    6. None

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  5

  5. CLEAR DTC 

    Pre-procedure1

    1. Connect the airbag sensor assembly connector.
      GTY1178311Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Curtain Shield Airbag Assembly RH
      *2 Airbag Sensor Assembly
      *3 Wire Harness
      *4 SST
      *a Front view of wire harness connector
      (to Curtain Shield Airbag Assembly RH)
    2. Connect SST (resistance: 2.1 Ω) to connector C.
      WARNING:

      Never connect the tester to the curtain shield airbag assembly RH 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 
    3. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.

      Procedure1

    5. Clear the DTCs stored in memory.

      Body Electrical > SRS Airbag > Clear DTCs 

      Result

      Proceed to
      NEXT

      Post-procedure1

    6. Turn the ignition switch off.

    Result: 

    NEXT 

    See step  6

  6. CHECK CURTAIN SHIELD AIRBAG ASSEMBLY RH 

    Pre-procedure1

    1. Turn the ignition switch to ON, and wait for at least 60 seconds.

      Procedure1

    2. Check for DTCs.

      Body Electrical > SRS Airbag > Trouble Codes 

      Result

      Result Proceed to
      B0029-12 is not output A
      B0029-12 is output B

      HINT: 

      Codes other than DTC B0029-12 may be output at this time, but they are not related to this check.

      Post-procedure1

    3. Turn the ignition switch off.
    4. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 60 seconds.
    5. Disconnect SST from connector C.

    Result: 

    A 

    REPLACE CURTAIN SHIELD AIRBAG ASSEMBLY RH. Refer to  REMOVAL [11/2023 - ] 

    Result: 

    B 

    See step  7

  7. CHECK HARNESS AND CONNECTOR 

    Pre-procedure1

    1. Disconnect the airbag sensor assembly connector.
    2. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
    3. Turn the ignition switch to ON.

      Procedure1

    4. Measure the voltage according to the value(s) in the table below.
      GTY1180064Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Curtain Shield Airbag Assembly RH
      *2 Airbag Sensor Assembly
      *3 Wire Harness
      *a Front view of wire harness connector
      (to Curtain Shield Airbag Assembly RH)

      Standard Voltage

      Tester Connection Condition Specified Condition
      M22-1 (ICR+) - Body ground Ignition switch ON Below 1 V
      M22-2 (ICR-) - Body ground Ignition switch ON Below 1 V

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    5. Turn the ignition switch off.
    6. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 60 seconds.

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  8

  8. CLEAR DTC 

    Pre-procedure1

    1. Connect the airbag sensor assembly connector.
      GTY972921Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Curtain Shield Airbag Assembly RH
      *2 Airbag Sensor Assembly
      *3 Wire Harness
    2. Connect the curtain shield airbag assembly RH connector.
    3. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.

      Procedure1

    5. Clear the DTCs stored in memory.

      Body Electrical > SRS Airbag > Clear DTCs 

      Result

      Proceed to
      NEXT

      Post-procedure1

    6. Turn the ignition switch off.

    Result: 

    NEXT 

    See step  9

  9. CHECK DTC 

    Pre-procedure1

    1. Turn the ignition switch to ON, and wait for at least 60 seconds.

      Procedure1

    2. Check for DTCs.

      Body Electrical > SRS Airbag > Trouble Codes 

      Result

      Result Proceed to
      B0029-12 is not output A
      B0029-12 is output B

      HINT: 

      Codes other than DTC B0029-12 may be output at this time, but they are not related to this check.

      Post-procedure1

    3. None

    Result: 

    A 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ] 

    Result: 

    B 

    REPLACE AIRBAG SENSOR ASSEMBLY. Refer to  REMOVAL [11/2023 - ] 

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