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 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, front seat airbag and front seat outer belt assembly.

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

DTC Code Detection Condition Trouble Area
B1660/43

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.

  • Instrument panel wire

  • Upper console panel sub-assembly

  • Airbag sensor assembly

WIRING DIAGRAM

A004OXBE18
*a from ECU-IG No. 1 Fuse
*b Upper Console Panel Sub-assembly (Passenger Airbag ON/OFF Indicator)
*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.

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.

      A004NPIE01
      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 upper console panel sub-assembly.

      OK
      The connectors are properly connected.

    NG

    CONNECT CONNECTORS PROPERLY

    OK

  3. CHECK CONNECTORS


    1. Disconnect the connectors from the airbag sensor assembly and upper console panel sub-assembly.

    2. A004QB7E02
      Text in Illustration
      *1 Upper Console Panel Sub-assembly
      *2 Airbag Sensor Assembly
      *3 Instrument Panel Wire

      Check that the connectors (on the airbag sensor assembly side and upper console panel sub-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


    1. A004N4N

      Connect the connector to the upper console panel sub-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.

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

    NG

    CHECK INSTRUMENT PANEL WIRE Click here

    OK

  5. CHECK FOR DTC


    1. A004RSDE01
      Text in Illustration
      *1 Upper Console Panel Sub-assembly
      *2 Airbag Sensor Assembly

      Connect the connector 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.

    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

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


    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

    REPLACE AIRBAG SENSOR ASSEMBLY Click here

  6. CHECK INSTRUMENT PANEL WIRE


    1. Disconnect the connector from the upper console panel sub-assembly.

      A004NH0E02
      Text in Illustration
      *1 Upper Console Panel Sub-assembly *2 Airbag Sensor Assembly
      *3 Instrument Panel Wire *4 Connector C
      *5 Connector B *6 Service Wire
      *a

      Front view of wire harness connector

      (to Upper Console Panel Sub-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
      D142-6 (PAON) - Body ground Ignition switch ON Below 1 V
      D142-4 (P-AB) - 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
      D142-6 (PAON) - D142-4 (P-AB) 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
      D142-6 (PAON) - D142-4 (P-AB) Always 1 MΩ or higher
      D142-6 (PAON) - Body ground Always 1 MΩ or higher
      D142-4 (P-AB) - Body ground Always 1 MΩ or higher

    OK

    REPLACE UPPER CONSOLE PANEL SUB-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 upper console panel sub-assembly.

      OK
      The connectors are properly connected.

    NG

    CONNECT CONNECTORS PROPERLY

    OK

  8. CHECK CONNECTORS


    1. A004QB7E02
      Text in Illustration
      *1 Upper Console Panel Sub-assembly
      *2 Airbag Sensor Assembly
      *3 Instrument Panel Wire

      Disconnect the connectors from the airbag sensor assembly and upper console panel sub-assembly.

    2. Check that the connectors (on the airbag sensor assembly side and upper console panel sub-assembly side) are not damaged.

      OK
      The connectors are not deformed or damaged.

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  9. CHECK INSTRUMENT PANEL WIRE


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

      A004U20E02
      Text in Illustration
      *1 Upper Console Panel Sub-assembly *2 Airbag Sensor Assembly
      *3 Instrument Panel Wire *4 Connector C
      *5 Connector B *6 Service Wire
      *a

      Front view of wire harness connector

      (to Upper Console Panel Sub-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
      D142-6 (PAON) - Body ground Ignition switch ON Below 1 V
      D142-4 (P-AB) - 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
      D142-6 (PAON) - D142-4 (P-AB) 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
      D142-6 (PAON) - D142-4 (P-AB) Always 1 MΩ or higher
      D142-6 (PAON) - Body ground Always 1 MΩ or higher
      D142-4 (P-AB) - Body ground Always 1 MΩ or higher

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

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


    1. A004NS9E01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Upper Console Panel Sub-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
      D142-3 (B) - Body ground Ignition switch ON 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

  11. CHECK PASSENGER AIRBAG ON/OFF INDICATOR


    1. A004RXXE01
      Text in Illustration
      *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 upper console panel sub-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
      Connection Switch Condition Passenger Airbag ON/OFF Indicator
      D10-23 (PAON) - Body ground Ignition switch ON "ON" comes on
      D10-17 (P-AB) - Body ground Ignition switch ON "OFF" comes on

    NG

    REPLACE UPPER CONSOLE PANEL SUB-ASSEMBLY Click here

    OK

  12. CHECK FOR DTC


    1. A004RSDE01
      Text in Illustration
      *1 Upper Console Panel Sub-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.

    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

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


    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

    REPLACE AIRBAG SENSOR ASSEMBLY Click here