AIRBAG SYSTEM, 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 center airbag sensor assembly and the passenger airbag ON/OFF indicator.

The passenger airbag ON/OFF indicator indicates the operation condition of the front passenger airbag and SRS seat cushion airbag.

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

DTC No. DTC Detection Condition Trouble Area
B1660/43

When one of following conditions is met:


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

  • Passenger airbag ON/OFF indicator malfunction

  • Center airbag sensor assembly malfunction

  • Instrument panel wire

  • Telltale light assembly (Passenger airbag ON/OFF indicator)

  • Center airbag sensor assembly

WIRING DIAGRAM

A0118SYE18

INSPECTION PROCEDURE

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.

      A011A51E26
      Result
      ON/OFF Indicator Illumination Proceed to
      Always ON A
      OFF B

    B

    CHECK CONNECTION OF CONNECTORS Click here

    A

  2. CHECK CONNECTION OF CONNECTORS


    1. Turn the ignition switch off.

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

    3. Check that the connectors are properly connected to the center airbag sensor assembly and the telltale light assembly.

      OK
      The connectors are properly connected.

    NG

    CONNECT CONNECTORS PROPERLY

    OK

  3. CHECK CONNECTORS


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

    2. Check that the connectors (on the center airbag sensor assembly side and telltale light assembly side) are not damaged.

      OK
      The connectors are not deformed or damaged.

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  4. CHECK PASSENGER AIRBAG ON/OFF INDICATOR

    A01174YE01
    Text in Illustration
    *1 w/ Audio
    *2 w/o Audio

    1. Connect the connector to the telltale light assembly.

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

    3. Turn the ignition switch to ON.

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

      OK
      The passenger airbag ON/OFF indicator does not come on.

    NG

    CHECK INSTRUMENT PANEL WIRE (CENTER AIRBAG SENSOR - TELLTALE LIGHT) Click here

    OK

  5. CHECK CENTER AIRBAG SENSOR ASSEMBLY

    A0119KEE34
    Text in Illustration
    *1 Telltale Light Assembly
    *2 Center Airbag Sensor Assembly

    1. Connect the connector to the center airbag sensor assembly.

    2. Connect the negative (-) terminal cable to the battery, 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 stored in the memory Click here.

    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.

      OK
      DTC B1660/43 is not output.

      Tech Tips

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


    NG

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here

  6. CHECK INSTRUMENT PANEL WIRE (CENTER AIRBAG SENSOR - TELLTALE LIGHT)

    A0116Y8E01
    Text in Illustration
    *1

    Front view of wire harness connector

    (to Telltale Light Assembly)

    		 *5 Instrument Panel Wire
    *2

    Rear view of wire harness connector

    (to Center Airbag Sensor Assembly)

    		 *6 Connector C
    *3 Telltale Light Assembly *7 Connector B
    *4 Center Airbag Sensor Assembly *8 Service Wire

    1. Turn the ignition switch off.

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

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

    4. Using a service wire, connect terminals 23 (PAON) and 17 (P-AB) of connector B.

      Note

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D65-1 (PAON) - D65-2 (P-AB) Always Below 1 Ω

    6. Disconnect the service wire from connector B.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D65-1 (PAON) - D65-2 (P-AB) Always 1 MΩ or higher
      D65-1 (PAON) - Body ground Always 1 MΩ or higher
      D65-2 (P-AB) - Body ground Always 1 MΩ or higher

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

    9. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      D65-1 (PAON) - Body ground Ignition switch ON Below 1 V
      D65-2 (P-AB) - Body ground Ignition switch ON Below 1 V

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

    REPLACE TELLTALE LIGHT ASSEMBLY Click here

  7. CHECK CONNECTION OF CONNECTORS


    1. Turn the ignition switch off.

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

    3. Check that the connectors are properly connected to the center airbag sensor assembly and the telltale light assembly.

      OK
      The connectors are properly connected.

    NG

    CONNECT CONNECTORS PROPERLY

    OK

  8. CHECK CONNECTORS


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

    2. Check that the connectors (on the center airbag sensor assembly side and telltale light assembly side) are not damaged.

      OK
      The connectors are not deformed or damaged.

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  9. CHECK INSTRUMENT PANEL WIRE (CENTER AIRBAG SENSOR - TELLTALE LIGHT)

    A0116Y8E01
    Text in Illustration
    *1

    Front view of wire harness connector

    (to Telltale Light Assembly)

    		 *5 Instrument Panel Wire
    *2

    Rear view of wire harness connector

    (to Center Airbag Sensor Assembly)

    		 *6 Connector C
    *3 Telltale Light Assembly *7 Connector B
    *4 Center Airbag Sensor Assembly *8 Service Wire

    1. Turn the ignition switch off.

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

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

    4. Using a service wire, connect terminals 23 (PAON) and 17 (P-AB) of connector B.

      Note

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D65-1 (PAON) - D65-2 (P-AB) Always Below 1 Ω

    6. Disconnect the service wire from connector B.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D65-1 (PAON) - D65-2 (P-AB) Always 1 MΩ or higher
      D65-1 (PAON) - Body ground Always 1 MΩ or higher
      D65-2 (P-AB) - Body ground Always 1 MΩ or higher

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

    9. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      D65-1 (PAON) - Body ground Ignition switch ON Below 1 V
      D65-2 (P-AB) - Body ground Ignition switch ON Below 1 V

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

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

    A011969E01
    Text in Illustration
    *1

    Front view of wire harness connector

    (to Telltale Light Assembly)

    1. Connect the connectors to the center airbag sensor assembly.

    2. Connect the negative (-) terminal cable to the battery, 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
      D65-6 (IG+) - Body ground Ignition switch ON 11 to 14 V

    NG

    REPLACE HARNESS AND CONNECTOR (TELLTALE LIGHT - BATTERY)

    OK

  11. CHECK PASSENGER AIRBAG ON/OFF INDICATOR

    A011838E01
    Text in Illustration
    *1

    Rear view of wire harness connector

    (to Center Airbag Sensor Assembly)

    1. Turn the ignition switch off.

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

    3. Connect the connector to the telltale light assembly.

    4. Disconnect the connectors from the center airbag sensor assembly.

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

    6. Turn the ignition switch to ON.

    7. Check the indicator according to the value(s) in the table below.

      OK
      Tester Connection Switch Condition Passenger airbag ON/OFF indicator
      D43-23 (PAON) - Body ground Ignition switch ON "ON" comes on
      D43-17 (P-AB) - Body ground Ignition switch ON "OFF" comes on

    NG

    REPLACE TELLTALE LIGHT ASSEMBLY Click here

    OK

  12. CHECK CENTER AIRBAG SENSOR ASSEMBLY

    A0119KEE34
    Text in Illustration
    *1 Telltale Light Assembly
    *2 Center Airbag Sensor Assembly

    1. Turn the ignition switch off.

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

    3. Connect the connectors to the center airbag sensor assembly.

    4. Connect the negative (-) terminal cable to the battery 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 stored in the memory Click here.

    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.

      OK
      DTC B1660/43 is not output.

      Tech Tips

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


    NG

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here