AIRBAG SYSTEM(for Type C), Diagnostic DTC:B1660/43

DTC Code DTC Name
B1660/43 Passenger Airbag ON/OFF Indicator Circuit Malfunction

DESCRIPTION

The passenger airbag ON/OFF indicator circuit consists of the airbag sensor assembly and passenger airbag ON/OFF indicator.

The passenger airbag ON/OFF indicator indicates the operation condition of the instrument panel passenger airbag assembly and front seat airbag assembly RH and LH.

DTC B1660/43 is stored when a malfunction is detected in the passenger airbag ON/OFF indicator circuit.

DTC No. Detection Item DTC Detection Condition Trouble Area
B1660/43 Passenger Airbag ON/OFF Indicator Circuit Malfunction

One of the following conditions is met:


  • The airbag sensor assembly detects an open circuit signal, short circuit to ground signal or short circuit to B+ signal in the passenger airbag ON/OFF indicator circuit for 2 seconds.

  • A passenger airbag ON/OFF indicator malfunction.

  • An airbag sensor assembly malfunction.

  • Harness and connector

  • Telltale light assembly

  • Airbag sensor assembly

WIRING DIAGRAM

B0024DUE05
*a from IG1 NO.4 Fuse
*b Telltale Light Assembly
*c Airbag Sensor Assembly

CAUTION / NOTICE / HINT

Note


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

    Click here

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

    Click here

  • After replacing the airbag sensor assembly, refer to initialization.

    Click here

PROCEDURE


  1. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CONDITION


    1. Turn the ignition switch to ON.

    2. Check the passenger airbag ON/OFF indicator operation.

      Tech Tips

      Refer to the normal condition of the passenger airbag ON/OFF indicator.

      Click here

      B0025Y9E19
      Result
      ON/OFF Indicator Illumination Proceed to
      One or both indicators are always on A
      Both indicators are always off B

    B

    CHECK CONNECTION OF CONNECTORS Click here

    A

  2. CHECK CONNECTION OF CONNECTORS


    1. Turn the ignition switch off.

    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 airbag sensor assembly and telltale light assembly.

      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. Disconnect the connectors from the airbag sensor assembly and telltale light assembly.

    2. B0024D8C06
      *1 Telltale Light Assembly
      *2 Airbag Sensor Assembly
      *3 Instrument Panel Wire

      Check that the connectors (on the airbag sensor assembly side and telltale light assembly 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 INSTRUMENT PANEL WIRE

    The connectors are not deformed or damaged

  4. CHECK PASSENGER AIRBAG ON/OFF INDICATOR


    1. B0026DN

      Connect the connector to the telltale light assembly.

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

    3. Turn the ignition switch to ON.

    4. Check the passenger airbag ON/OFF indicator operation.

      Result
      Proceed to
      The passenger airbag ON/OFF indicator does not come on
      The passenger airbag ON/OFF indicator comes on

    The passenger airbag ON/OFF indicator comes on

    CHECK INSTRUMENT PANEL WIRE Click here

    The passenger airbag ON/OFF indicator does not come on

  5. CHECK DTC


    1. B0026KLC04
      *1 Telltale Light Assembly
      *2 Airbag Sensor Assembly

      Connect the connectors to the airbag sensor assembly.

    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.

      Click here


      Body Electrical > SRS Airbag > Clear DTCs

    5. Turn the ignition switch off.

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

    7. Check for DTCs.

      Click here


      Body Electrical > SRS Airbag > Trouble Codes
      Result
      Proceed to
      DTC B1660/43 is not output
      DTC B1660/43 is output

      Tech Tips

      Codes other than DTC B1660/43 may be output at this time, but they are not related to this check.


    DTC B1660/43 is not output

    USE SIMULATION METHOD TO CHECK Click here

    DTC B1660/43 is output

    REPLACE AIRBAG SENSOR ASSEMBLY Click here

  6. CHECK INSTRUMENT PANEL WIRE


    1. Disconnect the connector from the telltale light assembly.

      B0024A3C01
      *1 Telltale Light Assembly *2 Airbag Sensor Assembly
      *3 Connector C *4 Connector B
      *5 Service Wire *6 Instrument Panel Wire
      *a

      Front view of wire harness connector

      (to Telltale Light Assembly)

      		 *b

      Rear view of wire harness connector

      (to Airbag Sensor Assembly)

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

    3. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      G24-4 (P-AB) - Body ground Ignition switch ON Below 1 V
      G24-5 (PAON) - 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. Using a service wire, connect terminals 23 (PAON) and 17 (P-AB) 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
      G24-4 (P-AB) - G24-5 (PAON) 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
      G24-4 (P-AB) - G24-5 (PAON) Always 1 MΩ or higher
      G24-4 (P-AB) - Body ground Always 1 MΩ or higher
      G24-5 (PAON) - Body ground Always 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE TELLTALE LIGHT ASSEMBLY Click here

    NG

    REPLACE INSTRUMENT PANEL WIRE

  7. CHECK CONNECTION OF CONNECTORS


    1. Turn the ignition switch off.

    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 airbag sensor assembly and telltale light assembly.

      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

  8. CHECK CONNECTORS


    1. Disconnect the connectors from the airbag sensor assembly and telltale light assembly.

    2. B0024D8C06
      *1 Telltale Light Assembly
      *2 Airbag Sensor Assembly
      *3 Instrument Panel Wire

      Check that the connectors (on the airbag sensor assembly side and telltale light assembly 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 INSTRUMENT PANEL WIRE

    The connectors are not deformed or damaged

  9. CHECK INSTRUMENT PANEL WIRE


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

      B0024A3C01
      *1 Telltale Light Assembly *2 Airbag Sensor Assembly
      *3 Connector C *4 Connector B
      *5 Service Wire *6 Instrument Panel Wire
      *a

      Front view of wire harness connector

      (to Telltale Light Assembly)

      		 *b

      Rear view of wire harness connector

      (to Airbag Sensor Assembly)

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      G24-4 (P-AB) - Body ground Ignition switch ON Below 1 V
      G24-5 (PAON) - 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. Using a service wire, connect terminals 23 (PAON) and 17 (P-AB) 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
      G24-4 (P-AB) - G24-5 (PAON) 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
      G24-4 (P-AB) - G24-5 (PAON) Always 1 MΩ or higher
      G24-4 (P-AB) - Body ground Always 1 MΩ or higher
      G24-5 (PAON) - Body ground Always 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  10. CHECK PASSENGER AIRBAG ON/OFF INDICATOR (SOURCE VOLTAGE)


    1. B00273RC02
      *a

      Front view of wire harness connector

      (to Telltale Light Assembly)

      Connect the connectors to the airbag sensor assembly.

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

    3. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      G24-10 (IG+) - Body ground Ignition switch ON 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE HARNESS OR CONNECTOR

    OK

  11. CHECK PASSENGER AIRBAG ON/OFF INDICATOR


    1. B0028T7C11
      *a

      Rear view of wire harness connector

      (to Airbag Sensor Assembly)

      Turn the ignition switch off.

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

    3. Connect the connector to the telltale light assembly.

    4. Disconnect the connectors from the airbag sensor assembly.

    5. Using a service wire, connect terminal 23 (PAON) and body ground.

    6. Using a service wire, connect terminal 17 (P-AB) and body ground.

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

    8. Turn the ignition switch to ON.

    9. Check the indicator according to the table below.

      OK
      Tester Connection Switch Condition Passenger Airbag ON/OFF Indicator
      G42-23 (PAON) - Body ground Ignition switch ON "ON" comes on
      G42-17 (P-AB) - Body ground Ignition switch ON "OFF" comes on

    10. Disconnect the service wire from the airbag sensor assembly.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE TELLTALE LIGHT ASSEMBLY Click here

    OK

  12. CHECK DTC


    1. B0026KLC02
      *1 Telltale Light Assembly
      *2 Airbag Sensor Assembly

      Turn the ignition switch off.

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

    3. Connect the connectors to the airbag sensor assembly.

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

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

    6. Clear the DTCs.

      Click here


      Body Electrical > SRS Airbag > Clear DTCs

    7. Turn the ignition switch off.

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

    9. Check for DTCs.

      Click here


      Body Electrical > SRS Airbag > Trouble Codes
      Result
      Proceed to
      DTC B1660/43 is not output
      DTC B1660/43 is output

      Tech Tips

      Codes other than DTC B1660/43 may be output at this time, but they are not related to this check.


    DTC B1660/43 is not output

    USE SIMULATION METHOD TO CHECK Click here

    DTC B1660/43 is output

    REPLACE AIRBAG SENSOR ASSEMBLY Click here