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 and the passenger airbag ON/OFF indicator.

The passenger airbag ON/OFF indicator indicates the operation condition of the front passenger airbag, front passenger side knee airbag, front seat airbag RH and front seat outer belt RH.

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

DTC Code DTC Detection Condition Trouble Area
B1660/43

When one of the following conditions is met:


  • The center airbag sensor 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.

  • A passenger airbag ON/OFF indicator malfunction.

  • A center airbag sensor malfunction.

  • Instrument panel wire

  • Multi-display assembly*1

  • Clock*2

  • Center airbag sensor assembly

  • No. 2 instrument panel wire

  • No. 5 instrument panel wire*2

Tech Tips

*1: w/ Navigation System

*2: w/o Navigation System

WIRING DIAGRAM

B001XJLE12
B001XA0E07
w/o Navigation System (w/o Cassette Tape Player)
*a gF1
*b from ECU-IG2 Fuse
*c Clock
*d Center Airbag Sensor
B001VXOE04
w/o Nabigation System (w/ Cassette Tape Player)
*a Fg1
*b from ECU-IG2 Fuse
*c Clock
*d Center Airbag Sensor

CAUTION / NOTICE / HINT

Note


  • After turning the ignition switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work Click here.

  • When disconnecting the cable, 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.

      B001ZDKE02

    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.

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

    3. Check that the connectors are properly connected to the center airbag sensor and the multi-display assembly or clock.

      OK
      The connectors are properly connected.

    NG

    CONNECT CONNECTORS PROPERLY

    OK

  3. CHECK CONNECTORS


    1. Disconnect the connectors from the center airbag sensor and the multi-display assembly or clock.

    2. Check that the connectors (on the center airbag sensor side and multi-display assembly side or clock side) are not damaged.

      OK
      The connectors are not deformed or damaged.

    NG

    REPLACE HARNESS AND CONNECTOR

    OK

  4. CHECK PASSENGER AIRBAG ON/OFF INDICATOR


    1. A01XABA

      Connect the connector to the multi-display assembly or clock.

    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 PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT Click here

    OK

  5. CHECK CENTER AIRBAG SENSOR


    1. B001XYBE11

      Connect the connector to the center airbag sensor.

    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 is not output.

      Tech Tips

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


    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here

  6. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT


    1. Turn the ignition switch off.

      B001WK9E01

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

    3. Disconnect the connector from the center airbag sensor and multi-display assembly or clock.

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

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

      Standard Voltage
      w/ Navigation System
      Tester Connection Switch Condition Specified Condition
      F79-20 (ARON) - Body ground Ignition switch ON Below 1 V
      F79-8 (AIR) - Body ground Ignition switch ON Below 1 V
      w/o Navigation System
      Tester Connection Switch Condition Specified Condition
      g1-3 (PAON) - Body ground Ignition switch ON Below 1 V
      g1-2 (P-AB) - Body ground Ignition switch ON Below 1 V

    6. Turn the ignition switch off.

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

    8. 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.

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

      Standard Resistance
      w/ Navigation System
      Tester Connection Condition Specified Condition
      F79-20 (ARON) - F79-8 (AIR) Always Below 1 Ω
      w/o Navigation System
      Tester Connection Condition Specified Condition
      g1-3 (PAON) - g1-2 (P-AB) Always Below 1 Ω

    10. Disconnect the service wire from connector B.

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

      Standard Resistance
      w/ Navigation System
      Tester Connection Condition Specified Condition
      F79-20 (ARON) - F79-8 (AIR) Always 1 MΩ or higher
      F79-20 (ARON) - Body ground Always 1 MΩ or higher
      F79-8 (AIR) - Body ground Always 1 MΩ or higher
      w/o Navigation System
      Tester Connection Condition Specified Condition
      g1-3 (PAON) - g1-2 (P-AB) Always 1 MΩ or higher
      g1-3 (PAON) - Body ground Always 1 MΩ or higher
      g1-2 (P-AB) - Body ground Always 1 MΩ or higher
      Result
      Result Proceed to
      OK (w/ Navigation System) A
      OK (w/o Navigation System) B
      NG C

    A

    REPLACE MULTI-DISPLAY ASSEMBLY Click here

    B

    REPLACE CLOCK Click here

    C

  7. CHECK INSTRUMENT PANEL WIRE (CENTER AIRBAG SENSOR - NO. 2 INSTRUMENT PANEL WIRE)


    1. Disconnect the instrument panel wire connector from the No. 2 instrument panel wire.

      B001WO6E02

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

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      FE4-13 (PAON) - Body ground Ignition switch ON Below 1 V
      FE4-12 (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
      FE4-13 (PAON) - FE4-12 (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
      FE4-13 (PAON) - FE4-12 (P-AB) Always 1 MΩ or higher
      FE4-13 (PAON) - Body ground Always 1 MΩ or higher
      FE4-12 (P-AB) - Body ground Always 1 MΩ or higher
      Result
      Result Proceed to
      OK (w/ Navigation System) A
      OK (w/o Navigation System) B
      NG C

    A

    REPLACE NO. 2 INSTRUMENT PANEL WIRE

    C

    REPLACE INSTRUMENT PANEL WIRE

    B

  8. CHECK NO. 2 INSTRUMENT PANEL WIRE (INSTRUMENT PANEL WIRE - NO. 5 INSTRUMENT PANEL WIRE)


    1. Disconnect the No. 2 instrument panel wire connector from the No. 5 instrument panel wire.

      B001XNNE02

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

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

      Standard Voltage
      w/o Cassette Type Player
      Tester Connection Switch Condition Specified Condition
      gF1-3 (PAON) - Body ground Ignition switch ON Below 1 V
      gF1-4 (P-AB) - Body ground Ignition switch ON Below 1 V
      w/ Cassette Type Player
      Tester Connection Switch Condition Specified Condition
      Fg1-3 (PAON) - Body ground Ignition switch ON Below 1 V
      Fg1-2 (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 13 (PAON) and 12 (P-AB) of connector D.

      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
      w/o Cassette Type Player
      Tester Connection Condition Specified Condition
      gF1-3 (PAON) - gF1-4 (P-AB) Always Below 1 Ω
      w/ Cassette Type Player
      Tester Connection Condition Specified Condition
      Fg1-3 (PAON) - Fg1-2 (P-AB) Always Below 1 Ω

    8. Disconnect the service wire from connector D.

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

      Standard Resistance
      w/o Cassette Type Player
      Tester Connection Condition Specified Condition
      gF1-3 (PAON) - gF1-4 (P-AB) Always 1 MΩ or higher
      gF1-3 (PAON) - Body ground Always 1 MΩ or higher
      gF1-4 (P-AB) - Body ground Always 1 MΩ or higher
      w/ Cassette Type Player
      Tester Connection Condition Specified Condition
      Fg1-3 (PAON) - Fg1-2 (P-AB) Always 1 MΩ or higher
      Fg1-3 (PAON) - Body ground Always 1 MΩ or higher
      Fg1-2 (P-AB) - Body ground Always 1 MΩ or higher

    OK

    REPLACE NO. 5 INSTRUMENT PANEL WIRE

    NG

    REPLACE NO. 2 INSTRUMENT PANEL WIRE

  9. 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 center airbag sensor and the multi-display assembly or clock.

      OK
      The connectors are properly connected.

    NG

    CONNECT CONNECTORS PROPERLY

    OK

  10. CHECK CONNECTORS


    1. Disconnect the connectors from the center airbag sensor and the multi-display assembly or clock.

    2. Check that the connectors (on the center airbag sensor side and multi-display assembly side or clock side) are not damaged.

      OK
      The connectors are not deformed or damaged.

    NG

    REPLACE HARNESS AND CONNECTOR

    OK

  11. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT


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

      B001WK9E01

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

      Standard Voltage
      w/ Navigation System
      Tester Connection Switch Condition Specified Condition
      F79-20 (ARON) - Body ground Ignition switch ON Below 1 V
      F79-8 (AIR) - Body ground Ignition switch ON Below 1 V
      w/o Navigation System
      Tester Connection Switch Condition Specified Condition
      g1-3 (PAON) - Body ground Ignition switch ON Below 1 V
      g1-2 (P-AB) - Body ground Ignition switch ON Below 1 V

    3. Turn the ignition switch off.

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

    5. 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.

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

      Standard Resistance
      w/ Navigation System
      Tester Connection Condition Specified Condition
      F79-20 (ARON) - F79-8 (AIR) Always Below 1 Ω
      w/o Navigation System
      Tester Connection Condition Specified Condition
      g1-3 (PAON) - g1-2 (P-AB) Always Below 1 Ω

    7. Disconnect the service wire from connector B.

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

      Standard Resistance
      w/ Navigation System
      Tester Connection Condition Specified Condition
      F79-20 (ARON) - F79-8 (AIR) Always 1 MΩ or higher
      F79-20 (ARON) - Body ground Always 1 MΩ or higher
      F79-8 (AIR) - Body ground Always 1 MΩ or higher
      w/o Navigation System
      Tester Connection Condition Specified Condition
      g1-3 (PAON) - g1-2 (P-AB) Always 1 MΩ or higher
      g1-3 (PAON) - Body ground Always 1 MΩ or higher
      g1-2 (P-AB) - Body ground Always 1 MΩ or higher

    NG

    CHECK INSTRUMENT PANEL WIRE (CENTER AIRBAG SENSOR - NO. 2 INSTRUMENT PANEL WIRE) Click here

    OK

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


    1. B001XWZE01
      *1 Front view of wire harness connector: (to Multi-display Assembly)
      *2 Front view of wire harness connector: (to Clock Assembly)

      Turn the ignition switch off.

    2. Connect the connectors to the center airbag sensor.

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

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

      Standard Voltage
      w/ Navigation System
      Tester Connection Switch Condition Specified Condition
      F64-3 (IG) - Body ground Ignition switch ON 11 to 14 V
      w/o Navigation System
      Tester Connection Switch Condition Specified Condition
      g1-10 (IG+) - Body ground Ignition switch ON 11 to 14 V
      Result
      Result Proceed to
      OK A
      NG (w/ Navigation System) B
      NG (w/o Navigation System) C

    B

    REPLACE HARNESS AND CONNECTOR (MULTI-DISPLAY - BATTERY) OR BATTERY

    C

    REPLACE HARNESS AND CONNECTOR (CLOCK - BATTERY) OR BATTERY

    A

  13. CHECK PASSENGER AIRBAG ON/OFF INDICATOR


    1. B001WD6E02
      *1 Rear view of wire harness connector: (to Center Airbag Sensor)

      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 multi-display assembly or clock.

    4. Disconnect the connectors from the center airbag sensor.

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

    6. Check the indicator according to the table below.

      OK
      Tester Connection Switch Condition Passenger airbag ON/OFF indicator
      E47-23 (PAON) - Body ground Ignition switch ON "ON" comes on
      E47-17 (P-AB) - Body ground Ignition switch ON "OFF" comes on
      Result
      Result Proceed to
      OK A
      NG (w/ Navigation System) B
      NG (w/o Navigation System) C

    B

    REPLACE MULTI-DISPLAY ASSEMBLY Click here

    C

    REPLACE CLOCK Click here

    A

  14. CHECK CENTER AIRBAG SENSOR


    1. B001XYBE11

      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 center airbag sensor.

    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 is not output.

      Tech Tips

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


    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here

  15. CHECK INSTRUMENT PANEL WIRE (CENTER AIRBAG SENSOR - NO. 2 INSTRUMENT PANEL WIRE)


    1. Disconnect the instrument panel wire connector from the No. 2 instrument panel wire.

      B002053E02

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

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      FE4-13 (PAON) - Body ground Ignition switch ON Below 1 V
      FE4-12 (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
      FE4-13 (PAON) - FE4-12 (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
      FE4-13 (PAON) - FE4-12 (P-AB) Always 1 MΩ or higher
      FE4-13 (PAON) - Body ground Always 1 MΩ or higher
      FE4-12 (P-AB) - Body ground Always 1 MΩ or higher
      Result
      Result Proceed to
      OK (w/ Navigation System) A
      OK (w/o Navigation System) B
      NG C

    A

    REPLACE NO. 2 INSTRUMENT PANEL WIRE

    C

    REPLACE INSTRUMENT PANEL WIRE

    B

  16. CHECK NO. 2 INSTRUMENT PANEL WIRE (INSTRUMENT PANEL WIRE - NO. 5 INSTRUMENT PANEL WIRE)


    1. Disconnect the No. 2 instrument panel wire connector from the No. 5 instrument panel wire.

      B001XNNE02

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

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

      Standard Voltage
      w/o Cassette Type Player
      Tester Connection Switch Condition Specified Condition
      gF1-3 (PAON) - Body ground Ignition switch ON Below 1 V
      gF1-4 (P-AB) - Body ground Ignition switch ON Below 1 V
      w/ Cassette Type Player
      Tester Connection Switch Condition Specified Condition
      Fg1-3 (PAON) - Body ground Ignition switch ON Below 1 V
      Fg1-2 (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 13 (PAON) and 12 (P-AB) of connector D.

      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
      w/o Cassette Type Player
      Tester Connection Condition Specified Condition
      gF1-3 (PAON) - gF1-4 (P-AB) Always Below 1 Ω
      w/ Cassette Type Player
      Tester Connection Condition Specified Condition
      Fg1-3 (PAON) - Fg1-2 (P-AB) Always Below 1 Ω

    8. Disconnect the service wire from connector D.

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

      Standard Resistance
      w/o Cassette Type Player
      Tester Connection Condition Specified Condition
      gF1-3 (PAON) - gF1-4 (P-AB) Always 1 MΩ or higher
      gF1-3 (PAON) - Body ground Always 1 MΩ or higher
      gF1-4 (P-AB) - Body ground Always 1 MΩ or higher
      w/ Cassette Type Player
      Tester Connection Condition Specified Condition
      Fg1-3 (PAON) - Fg1-2 (P-AB) Always 1 MΩ or higher
      Fg1-3 (PAON) - Body ground Always 1 MΩ or higher
      Fg1-2 (P-AB) - Body ground Always 1 MΩ or higher

    OK

    REPLACE NO. 5 INSTRUMENT PANEL WIRE

    NG

    REPLACE NO. 2 INSTRUMENT PANEL WIRE