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 passenger airbag ON/OFF indicator.

The passenger airbag ON/OFF indicator indicates the operation condition of the instrument panel passenger airbag, lower No. 2 instrument panel airbag assembly, front seat airbag RH*1 or LH*2 and front seat outer belt assembly RH*1 or LH*2.

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

*1: for LHD

*2: for RHD

DTC Code Detection Condition Trouble Area
B1660/43

One of the following conditions is met:


  • The center 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.

  • A center airbag sensor assembly malfunction.

  • Instrument panel wire

  • Multi-media module receiver assembly

  • Center airbag sensor assembly

WIRING DIAGRAM

A000RJJE14

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 PASSENGER AIRBAG ON/OFF INDICATOR CONDITION


    1. Turn the power switch on (IG).

    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.

      A000MT1E04
      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 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 center airbag sensor assembly and multi-media module receiver 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 multi-media module receiver assembly.

    2. A000T7RE02
      Text in Illustration
      *1 Multi-media Module Receiver Assembly
      *2 Center Airbag Sensor Assembly
      *3 Instrument Panel Wire

      Check that the connectors (on the center airbag sensor assembly side and multi-media module receiver 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. A000RIG

      Connect the connector to the multi-media module receiver assembly.

    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. 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 CENTER AIRBAG SENSOR ASSEMBLY


    1. A000T5NE01
      Text in Illustration
      *1 Multi-media Module Receiver Assembly
      *2 Center Airbag Sensor Assembly

      Connect the connector to the center airbag sensor assembly.

    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 Click here.

    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.

      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 CENTER AIRBAG SENSOR ASSEMBLY Click here

  6. CHECK INSTRUMENT PANEL WIRE


    1. Disconnect the connector from the multi-media module receiver assembly.

      A000RHQE02
      Text in Illustration
      *1 Multi-media Module Receiver Assembly *2 Center Airbag Sensor Assembly
      *3 Instrument Panel Wire *4 Connector C
      *5 Connector B *6 Service Wire
      *a

      Front view of wire harness connector

      (to Multi-media Module Receiver Assembly)

      		 *b

      Rear view of wire harness connector

      (to Center Airbag Sensor Assembly)

    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
      N164-34 (ARON) - Body ground Power switch on (IG) Below 1 V
      N164-33 (AIR) - 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 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
      N164-34 (ARON) - N164-33 (AIR) 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
      N164-34 (ARON) - N164-33 (AIR) Always 1 MΩ or higher
      N164-34 (ARON) - Body ground Always 1 MΩ or higher
      N164-33 (AIR) - Body ground Always 1 MΩ or higher

    OK

    REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY Click here

    NG

    REPLACE INSTRUMENT PANEL WIRE

  7. 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 center airbag sensor assembly and multi-media module receiver assembly.

      OK
      The connectors are properly connected.

    NG

    CONNECT CONNECTORS PROPERLY

    OK

  8. CHECK CONNECTORS


    1. A000T7RE02
      Text in Illustration
      *1 Multi-media Module Receiver Assembly
      *2 Center Airbag Sensor Assembly
      *3 Instrument Panel Wire

      Disconnect the connectors from the center airbag sensor assembly and multi-media module receiver assembly.

    2. Check that the connectors (on the center airbag sensor assembly side and multi-media module receiver 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 (-) auxiliary battery terminal, and wait for at least 2 seconds.

      A000RHQE02
      Text in Illustration
      *1 Multi-media Module Receiver Assembly *2 Center Airbag Sensor Assembly
      *3 Instrument Panel Wire *4 Connector C
      *5 Connector B *6 Service Wire
      *a

      Front view of wire harness connector

      (to Multi-media Module Receiver Assembly)

      		 *b

      Rear view of wire harness connector

      (to Center Airbag Sensor Assembly)

    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
      N164-34 (ARON) - Body ground Power switch on (IG) Below 1 V
      N164-33 (AIR) - 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 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
      N164-34 (ARON) - N164-33 (AIR) 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
      N164-34 (ARON) - N164-33 (AIR) Always 1 MΩ or higher
      N164-34 (ARON) - Body ground Always 1 MΩ or higher
      N164-33 (AIR) - Body ground Always 1 MΩ or higher

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

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


    1. A000OHFE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Multi-media Module Receiver Assembly)

      Connect the connectors to the center airbag sensor assembly.

    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
      N164-15 (IG) - Body ground Power switch on (IG) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

  11. CHECK PASSENGER AIRBAG ON/OFF INDICATOR


    1. A000PUVE03
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Center Airbag Sensor Assembly)

      Turn the power switch off.

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

    3. Connect the connector to the multi-media module receiver assembly.

    4. Disconnect the connectors from the center 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 (-) auxiliary battery terminal, and wait for at least 2 seconds.

    8. Turn the power switch on (IG).

    9. Check the indicator according to the table below.

      OK
      Tester Connection Switch Condition Passenger Airbag ON/OFF Indicator
      N52-23 (PAON) - Body ground Power switch on (IG) "ON" comes on
      N52-17 (P-AB) - Body ground Power switch on (IG) "OFF" comes on

    NG

    REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY Click here

    OK

  12. CHECK CENTER AIRBAG SENSOR ASSEMBLY


    1. A000T5NE01
      Text in Illustration
      *1 Multi-media Module Receiver Assembly
      *2 Center Airbag Sensor Assembly

      Turn the power switch off.

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

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

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

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

    6. Clear the DTCs Click here.

    7. Turn the power switch off.

    8. Turn the power switch on (IG), 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 CENTER AIRBAG SENSOR ASSEMBLY Click here