AIRBAG SYSTEM, Diagnostic DTC:B166D/81, B166E/81, B167B/82, B167C/82

DTC Code DTC Name
B166D/81 Lost Communication with Front Door Pressure Sensor RH
B166E/81 Front Door Pressure Sensor RH Initialization Incomplete
B167B/82 Lost Communication with Front Door Pressure Sensor LH
B167C/82 Front Door Pressure Sensor LH Initialization Incomplete

DESCRIPTION

The circuit for the side collision sensor LH or RH is composed of the airbag ECU assembly, side airbag sensor assembly LH or RH and door side airbag sensor LH or RH.

The side airbag sensor assembly LH or RH and door side airbag sensor LH or RH detect impacts to the vehicle and send signals to the airbag ECU assembly to determine if the airbag should be deployed.

DTC B166D/81, B166E/81, B167B/82 or B167C/82 is stored when a malfunction is detected in the circuit for the side collision sensor LH or RH.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Test Mode / Check Mode
B166D/81 Lost Communication with Front Door Pressure Sensor RH

One of the following conditions is met:


  • The airbag ECU assembly detects a line short circuit signal, open circuit signal, short circuit to ground signal or short circuit to B+ signal in the circuit for the side collision sensor RH for 2 seconds.

  • A door side airbag sensor RH malfunction.

  • A side airbag sensor assembly RH malfunction.

  • An airbag ECU assembly malfunction.

  • Floor wire

  • Front door wire RH

  • Door side airbag sensor RH

  • Rear airbag sensor RH

  • Airbag ECU assembly

 Comes on Not applicable
B166E/81 Front Door Pressure Sensor RH Initialization Incomplete

One of the following conditions is met:


  • The airbag ECU assembly detects a line short circuit signal, open circuit signal, short circuit to ground signal or short circuit to B+ signal in the circuit for the side collision sensor RH for 2 seconds.

  • A door side airbag sensor RH malfunction.

  • A side airbag sensor assembly RH malfunction.

  • An airbag ECU assembly malfunction.

  • Floor wire

  • Front door wire RH

  • Door side airbag sensor RH

  • Rear airbag sensor RH

  • Airbag ECU assembly

 Comes on Not applicable
B167B/82 Lost Communication with Front Door Pressure Sensor LH

One of the following conditions is met:


  • The airbag ECU assembly detects a line short circuit signal, open circuit signal, short circuit to ground signal or short circuit to B+ signal in the circuit for the side collision sensor LH for 2 seconds.

  • A door side airbag sensor LH malfunction.

  • A side airbag sensor assembly LH malfunction.

  • An airbag ECU assembly malfunction.

  • Floor wire

  • Front door wire LH

  • Door side airbag sensor LH

  • Rear airbag sensor LH

  • Airbag ECU assembly

 Comes on Not applicable
B167C/82 Front Door Pressure Sensor LH Initialization Incomplete

One of the following conditions is met:


  • The airbag ECU assembly detects a line short circuit signal, open circuit signal, short circuit to ground signal or short circuit to B+ signal in the circuit for the side collision sensor LH for 2 seconds.

  • A door side airbag sensor LH malfunction.

  • A side airbag sensor assembly LH malfunction.

  • An airbag ECU assembly malfunction.

  • Floor wire

  • Front door wire LH

  • Door side airbag sensor LH

  • Rear airbag sensor LH

  • Airbag ECU assembly

 Comes on Not applicable

WIRING DIAGRAM

B004CE4E53
*a Airbag ECU Assembly
*b Rear Airbag Sensor RH
*c Door Side Airbag Sensor RH
B004CE4E55
*a Airbag ECU Assembly
*b Rear Airbag Sensor LH
*c Door Side Airbag Sensor LH

CAUTION / NOTICE / HINT

Note


  • After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

    Click here

  • When disconnecting the cable from the negative (-) auxiliary battery terminal while performing repairs, some systems need to be initialized after the cable is reconnected.

    Click here

PROCEDURE


  1. CHECK DTC


    1. Turn the power switch off.

    2. Turn the power switch on (IG), and wait for at least 60 seconds.

    3. Clear the DTCs stored in memory.

      Click here


      Body Electrical > SRS Airbag > Clear DTCs

    4. Turn the power switch off.

    5. Turn the power switch on (IG), and wait for at least 60 seconds.

    6. Check for DTCs.

      Click here


      Body Electrical > SRS Airbag > Trouble Codes
      Result
      Proceed to
      DTC B166D/81 or B166E/81 is output
      DTC B167B/82 or B167C/82 is output
      DTC B166D/81, B166E/81, B167B/82 and B167C/82 are not output

      Tech Tips

      Codes other than DTC B166D/81, B166E/81, B167B/82 and B167C/82 may be output at this time, but they are not related to this check.


    DTC B167B/82 or B167C/82 is output

    CHECK CONNECTION OF CONNECTORS Click here

    DTC B166D/81, B166E/81, B167B/82 and B167C/82 are not output

    USE SIMULATION METHOD TO CHECK Click here

    DTC B166D/81 or B166E/81 is output

  2. CHECK CONNECTION OF CONNECTORS


    1. Turn the power switch off.

    2. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.

    3. Check that the connectors are properly connected to the rear airbag sensor RH and door side airbag sensor RH.

      Result
      Proceed to
      The connectors are properly connected
      The connectors are not properly connected

    The connectors are not properly connected

    CONNECT CONNECTORS PROPERLY

    The connectors are properly connected

  3. CHECK CONNECTORS


    1. B004C1ZC06
      *1 Door Side Airbag Sensor RH
      *2 Rear Airbag Sensor RH
      *3 Front Door Wire RH
      *4 Floor Wire

      Disconnect the connectors from the rear airbag sensor RH and door side airbag sensor RH.

    2. Check that the connectors (on the rear airbag sensor RH side and door side airbag sensor RH side) are not damaged.

      Result
      Proceed to
      The connectors are not deformed or damaged
      The connectors are deformed or damaged

    The connectors are deformed or damaged

    REPLACE FRONT DOOR WIRE RH OR FLOOR WIRE

    The connectors are not deformed or damaged

  4. CHECK DOOR SIDE AIRBAG SENSOR RH CIRCUIT


    1. B004B5CC01
      *1 Door Side Airbag Sensor RH
      *2 Rear Airbag Sensor RH
      *3 Front Door Wire RH
      *4 Floor Wire
      *5 Service Wire
      *a

      Front view of wire harness connector

      (to Door Side Airbag Sensor RH)
      *b

      Front view of wire harness connector

      (to Rear Airbag Sensor RH)

      Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.

    2. Turn the power switch on (IG).

    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      R7-2 (BDR+) - Body ground Power switch on (IG) Below 1 V
      R7-1 (BDR-) - Body ground Power switch on (IG) Below 1 V

    4. Turn the power switch off.

    5. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.

    6. Using a service wire, connect terminals 1 (BBR+) and 2 (BBR-) of connector B.

      Note

      Do not forcibly insert the service wire into the terminals of the connector when connecting a service wire.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R7-2 (BDR+) - R7-1 (BDR-) Always Below 1 Ω

    8. Disconnect the service wire from connector B.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R7-2 (BDR+) - R7-1 (BDR-) Always 1 MΩ or higher
      R7-2 (BDR+) - Body ground Always 1 MΩ or higher
      R7-1 (BDR-) - Body ground Always 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    CHECK FLOOR WIRE Click here

    OK

  5. CHECK REAR AIRBAG SENSOR RH


    1. B004CN0C31
      *1 Rear Airbag Sensor LH
      *2 Airbag ECU Assembly

      Connect the connectors to the airbag ECU assembly and door side airbag sensor RH.

    2. Interchange the rear airbag sensor RH with LH and connect the connectors to them.

    3. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.

    4. Turn the power switch on (IG), and wait for at least 60 seconds.

    5. Clear the DTCs stored in memory.

      Click here


      Body Electrical > SRS Airbag > Clear DTCs

    6. Turn the power switch off.

    7. Turn the power switch on (IG), and wait for at least 60 seconds.

    8. Check for DTCs.

      Click here


      Body Electrical > SRS Airbag > Trouble Codes
      Result
      Proceed to
      DTC B166D/81 or B166E/81 is output
      DTC B167B/82 or B167C/82 is output
      DTC B166D/81, B166E/81, B167B/82 and B167C/82 are not output

      Tech Tips

      Codes other than DTC B166D/81, B166E/81, B167B/82 and B167C/82 may be output at this time, but they are not related to this check.

    9. Turn the power switch off.

    10. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.

    11. Return the side airbag sensor assembly LH and RH to their original positions and connect the connectors to them.


    DTC B167B/82 or B167C/82 is output

    REPLACE REAR AIRBAG SENSOR RH Click here

    DTC B166D/81, B166E/81, B167B/82 and B167C/82 are not output

    USE SIMULATION METHOD TO CHECK Click here

    DTC B166D/81 or B166E/81 is output

  6. CHECK DOOR SIDE AIRBAG SENSOR RH


    1. B004AAYC15
      *1 Door Side Airbag Sensor LH
      *2 Rear Airbag Sensor RH

      Interchange the door side airbag sensor RH with LH and connect the connectors to them.

    2. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.

    3. Turn the power switch on (IG), and wait for at least 60 seconds.

    4. Clear the DTCs stored in memory.

      Click here


      Body Electrical > SRS Airbag > Clear DTCs

    5. Turn the power switch off.

    6. Turn the power switch on (IG), and wait for at least 60 seconds.

    7. Check for DTCs.

      Click here


      Body Electrical > SRS Airbag > Trouble Codes
      Result
      Proceed to
      DTC B167B/82 or B167C/82 is output
      DTC B166D/81 or B166E/81 is output
      DTC B166D/81, B166E/81, B167B/82 and B167C/82 are not output

      Tech Tips

      Codes other than DTC B166D/81, B166E/81, B167B/82 and B167C/82 may be output at this time, but they are not related to this check.

    8. Turn the power switch off.

    9. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.

    10. Return the door side airbag sensor LH and RH to their original positions and connect the connectors to them.


    DTC B167B/82 or B167C/82 is output

    REPLACE DOOR SIDE AIRBAG SENSOR RH Click here

    DTC B166D/81 or B166E/81 is output

    REPLACE AIRBAG ECU ASSEMBLY Click here

    DTC B166D/81, B166E/81, B167B/82 and B167C/82 are not output

    USE SIMULATION METHOD TO CHECK Click here

  7. CHECK FLOOR WIRE


    1. B004BJTC03
      *1 Door Side Airbag Sensor RH
      *2 Rear Airbag Sensor RH
      *3 Front Door Wire RH
      *4 Floor Wire
      *5 Service Wire
      *a

      Front view of wire harness connector

      (to Front Door Wire RH)
      *b

      Front view of wire harness connector

      (to Rear Airbag Sensor RH)

      Disconnect the floor wire connector from the front door wire RH.

    2. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.

    3. Turn the power switch on (IG).

    4. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      RX1-30 (BBR+) - Body ground Power switch on (IG) Below 1 V
      RX1-48 (BBR-) - Body ground Power switch on (IG) Below 1 V

    5. Turn the power switch off.

    6. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.

    7. Using a service wire, connect terminals 1 (BBR+) and 2 (BBR-) of connector B.

      Note

      Do not forcibly insert the service wire into the terminals of the connector when connecting a service wire.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      RX1-30 (BBR+) - RX1-48 (BBR-) Always Below 1 Ω

    9. Disconnect the service wire from connector B.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      RX1-30 (BBR+) - RX1-48 (BBR-) Always 1 MΩ or higher
      RX1-30 (BBR+) - Body ground Always 1 MΩ or higher
      RX1-48 (BBR-) - Body ground Always 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE FRONT DOOR WIRE RH

    NG

    REPLACE FLOOR WIRE

  8. CHECK CONNECTION OF CONNECTORS


    1. Turn the power switch off.

    2. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.

    3. Check that the connectors are properly connected to the rear airbag sensor LH and door side airbag sensor LH.

      Result
      Proceed to
      The connectors are properly connected
      The connectors are not properly connected

    The connectors are not properly connected

    CONNECT CONNECTORS PROPERLY

    The connectors are properly connected

  9. CHECK CONNECTORS


    1. B004C1ZC06
      *1 Door Side Airbag Sensor LH
      *2 Rear Airbag Sensor LH
      *3 Front Door Wire LH
      *4 Floor Wire

      Disconnect the connectors from the rear airbag sensor LH and door side airbag sensor LH.

    2. Check that the connectors (on the rear airbag sensor LH side and door side airbag sensor LH side) are not damaged.

      Result
      Proceed to
      The connectors are not deformed or damaged
      The connectors are deformed or damaged

    The connectors are deformed or damaged

    REPLACE FRONT DOOR WIRE LH OR FLOOR WIRE

    The connectors are not deformed or damaged

  10. CHECK DOOR SIDE AIRBAG SENSOR LH CIRCUIT


    1. B004B5CC02
      *1 Door Side Airbag Sensor LH
      *2 Rear Airbag Sensor LH
      *3 Front Door Wire LH
      *4 Floor Wire
      *5 Service Wire
      *a

      Front view of wire harness connector

      (to Door Side Airbag Sensor LH)
      *b

      Front view of wire harness connector

      (to Rear Airbag Sensor LH)

      Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.

    2. Turn the power switch on (IG).

    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      S7-1 (BDL-) - Body ground Power switch on (IG) Below 1 V
      S7-2 (BDL+) - Body ground Power switch on (IG) Below 1 V

    4. Turn the power switch off.

    5. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.

    6. Using a service wire, connect terminals 1 (BBL+) and 2 (BBL-) of connector B.

      Note

      Do not forcibly insert the service wire into the terminals of the connector when connecting a service wire.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      S7-1 (BDL-) - S7-2 (BDL+) Always Below 1 Ω

    8. Disconnect the service wire from connector B.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      S7-1 (BDL-) - S7-2 (BDL+) Always 1 MΩ or higher
      S7-1 (BDL-) - Body ground Always 1 MΩ or higher
      S7-2 (BDL+) - Body ground Always 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    CHECK FLOOR WIRE Click here

    OK

  11. CHECK REAR AIRBAG SENSOR LH


    1. B004CILC01
      *1 Rear Airbag Sensor RH
      *2 Airbag ECU Assembly

      Connect the connectors to the airbag ECU assembly and door side airbag sensor LH.

    2. Interchange the rear airbag sensor LH with RH and connect the connectors to them.

    3. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.

    4. Turn the power switch on (IG), and wait for at least 60 seconds.

    5. Clear the DTCs stored in memory.

      Click here


      Body Electrical > SRS Airbag > Clear DTCs

    6. Turn the power switch off.

    7. Turn the power switch on (IG), and wait for at least 60 seconds.

    8. Check for DTCs.

      Click here


      Body Electrical > SRS Airbag > Trouble Codes
      Result
      Proceed to
      DTC B166D/81 or B166E/81 is output
      DTC B167B/82 or B167C/82 is output
      DTC B166D/81, B166E/81, B167B/82 and B167C/82 are not output

      Tech Tips

      Codes other than DTC B166D/81, B166E/81, B167B/82 and B167C/82 may be output at this time, but they are not related to this check.

    9. Turn the power switch off.

    10. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.

    11. Return the rear airbag sensor RH and LH to their original positions and connect the connectors to them.


    DTC B166D/81 or B166E/81 is output

    REPLACE REAR AIRBAG SENSOR LH Click here

    DTC B166D/81, B166E/81, B167B/82 and B167C/82 are not output

    USE SIMULATION METHOD TO CHECK Click here

    DTC B167B/82 or B167C/82 is output

  12. CHECK DOOR SIDE AIRBAG SENSOR LH


    1. B004AAYC15
      *1 Door Side Airbag Sensor RH
      *2 Rear Airbag Sensor LH

      Interchange the door side airbag sensor LH with RH and connect the connectors to them.

    2. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.

    3. Turn the power switch on (IG), and wait for at least 60 seconds.

    4. Clear the DTCs stored in memory.

      Click here


      Body Electrical > SRS Airbag > Clear DTCs

    5. Turn the power switch off.

    6. Turn the power switch on (IG), and wait for at least 60 seconds.

    7. Check for DTCs.

      Click here


      Body Electrical > SRS Airbag > Trouble Codes
      Result
      Proceed to
      DTC B166D/81 or B166E/81 is output
      DTC B167B/82 or B167C/82 is output
      DTC B166D/81, B166E/81, B167B/82 and B167C/82 are not output

      Tech Tips

      Codes other than DTC B166D/81, B166E/81, B167B/82 and B167C/82 may be output at this time, but they are not related to this check.

    8. Turn the power switch off.

    9. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.

    10. Return the door side airbag sensor RH and LH to their original positions and connect the connectors to them.


    DTC B166D/81 or B166E/81 is output

    REPLACE DOOR SIDE AIRBAG SENSOR LH Click here

    DTC B167B/82 or B167C/82 is output

    REPLACE AIRBAG ECU ASSEMBLY Click here

    DTC B166D/81, B166E/81, B167B/82 and B167C/82 are not output

    USE SIMULATION METHOD TO CHECK Click here

  13. CHECK FLOOR WIRE


    1. B004BJTC02
      *1 Door Side Airbag Sensor LH
      *2 Rear Airbag Sensor LH
      *3 Front Door Wire LH
      *4 Floor Wire
      *5 Service Wire
      *a

      Front view of wire harness connector

      (to Front Door Wire LH)
      *b

      Front view of wire harness connector

      (to Rear Airbag Sensor LH)

      Disconnect the floor wire connector from the front door wire LH.

    2. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.

    3. Turn the power switch on (IG).

    4. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      SX1-30 (BBL+) - Body ground Power switch on (IG) Below 1 V
      SX1-48 (BBL-) - Body ground Power switch on (IG) Below 1 V

    5. Turn the power switch off.

    6. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.

    7. Using a service wire, connect terminals 1 (BBL+) and 2 (BBL-) of connector B.

      Note

      Do not forcibly insert the service wire into the terminals of the connector when connecting a service wire.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      SX1-30 (BBL+) - SX1-48 (BBL-) Always Below 1 Ω

    9. Disconnect the service wire from connector B.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      SX1-30 (BBL+) - SX1-48 (BBL-) Always 1 MΩ or higher
      SX1-30 (BBL+) - Body ground Always 1 MΩ or higher
      SX1-48 (BBL-) - Body ground Always 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE FRONT DOOR WIRE LH

    NG

    REPLACE FLOOR WIRE