DSD Information System
Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Airbag System - Diagnostic Codes (1 Of 7) >> Airbag System >> DTC B0001-11: Driver Frontal Stage 1 Deployment Control Circuit Short to Ground [11/2023 - ] >> Procedure

DTC B0001-11: Driver Frontal Stage 1 Deployment Control Circuit Short to Ground [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
      B0001-11 is output A
      B0001-11 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 horn button assembly, spiral cable sub-assembly 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.
      GTY972369Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Horn Button Assembly
      *2 Airbag Sensor Assembly
      *3 Spiral Cable Sub-assembly
      *4 Wire Harness
    2. Disconnect the spiral cable sub-assembly connector.
    3. Disconnect the horn button assembly connector.

      Procedure1

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

      OK

      The terminals are not deformed or damaged.

    5. 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.

    6. Check that the short springs of the activation prevention mechanisms of the wire harness connector and spiral cable sub-assembly connector are not deformed or damaged.

      OK

      The short springs are not deformed or damaged.

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    7. None

    Result: 

    NG 

    REPAIR OR REPLACE WIRE HARNESS OR SPIRAL CABLE SUB-ASSEMBLY 

    Result: 

    OK 

    See step  5

  5. CLEAR DTC 

    Pre-procedure1

    1. Connect the airbag sensor assembly connector.
      GTY1178555Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Horn Button Assembly
      *2 Airbag Sensor Assembly
      *3 Spiral Cable Sub-assembly
      *4 Wire Harness
      *5 SST
      *a Front view of wire harness connector
      (to Horn Button Assembly)
      *b Color: Light Green
    2. Connect the spiral cable sub-assembly connector.
    3. Connect SST (resistance: 2.1 Ω) to connector E (light green connector).
      WARNING:

      Never connect the tester to the horn button assembly 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 
    4. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
    5. Turn the ignition switch to ON, and wait for at least 60 seconds.

      Procedure1

    6. Clear the DTCs stored in memory.

      Body Electrical > SRS Airbag > Clear DTCs 

      Result

      Proceed to
      NEXT

      Post-procedure1

    7. Turn the ignition switch off.

    Result: 

    NEXT 

    See step  6

  6. CHECK HORN BUTTON ASSEMBLY 

    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
      B0001-11 is not output A
      B0001-11 is output B

      HINT: 

      Codes other than DTC B0001-11 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 E.

    Result: 

    A 

    REPLACE HORN BUTTON ASSEMBLY. Refer to  REMOVAL [11/2023 - ] 

    Result: 

    B 

    See step  7

  7. CHECK DRIVER SIDE SQUIB CIRCUIT 

    Pre-procedure1

    1. Disconnect the airbag sensor assembly connector.

      Procedure1

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      z2-1 - Body ground Always 1 MΩ or higher
      z2-2 - Body ground Always 1 MΩ or higher

      Result

      Proceed to
      OK
      NG
      GTY1178166Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Horn Button Assembly
      *2 Airbag Sensor Assembly
      *3 Spiral Cable Sub-assembly
      *4 Wire Harness
      *a Front view of wire harness connector
      (to Horn Button Assembly)
      *b Color: Light Green

      Post-procedure1

    3. None

    Result: 

    NG 

    See step  10

    Result: 

    OK 

    See step  8

  8. CLEAR DTC 

    Pre-procedure1

    1. Connect the airbag sensor assembly connector.
      GTY972466Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Horn Button Assembly
      *2 Airbag Sensor Assembly
      *3 Spiral Cable Sub-assembly
      *4 Wire Harness
    2. Connect the horn button assembly 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
      B0001-11 is not output A
      B0001-11 is output B

      HINT: 

      Codes other than DTC B0001-11 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 - ] 

  10. CHECK HARNESS AND CONNECTOR 

    Pre-procedure1

    1. Disconnect the spiral cable sub-assembly connector.

      Procedure1

    2. Measure the resistance according to the value(s) in the table below.
      GTY1178013Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Horn Button Assembly
      *2 Airbag Sensor Assembly
      *3 Spiral Cable Sub-assembly
      *4 Wire Harness
      *a Front view of wire harness connector
      (to Spiral Cable Sub-assembly)

      Standard Resistance

      Tester Connection Condition Specified Condition
      H25-1 (D+) - Body ground Always 1 MΩ or higher
      H25-2 (D-) - Body ground Always 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    3. None

    Result: 

    OK 

    REPLACE SPIRAL CABLE SUB-ASSEMBLY. Refer to  REMOVAL [11/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

Diesel-Data.com