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 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

  • Combination Meter Assembly

  • Airbag sensor assembly

WIRING DIAGRAM

A01MGO4E01
*a from METER-IG2 Fuse
*b Combination Meter Assembly
*c Airbag Sensor Assembly

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

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

    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

      A01MG0CE27
      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 airbag sensor assembly and air conditioning control assembly.

      Result
      Result Proceed to
      The connectors are properly connected A
      The connectors are not properly connected B

    B

    CONNECT CONNECTORS PROPERLY

    A

  3. CHECK CONNECTORS


    1. Disconnect the connectors from the airbag sensor assembly and combination meter assembly.

    2. A01MHFAC06
      *1 Combination Meter Assembly
      *2 Airbag Sensor Assembly

      Check that the connectors (on the airbag sensor assembly side and combination meter assembly side) are not damaged.

      Result
      Result Proceed to
      The connectors are not deformed or damaged A
      The connectors are deformed or damaged B

    B

    REPLACE HARNESS AND CONNECTOR

    A

  4. CHECK PASSENGER AIRBAG ON/OFF INDICATOR


    1. A01MGSY

      Connect the connector to the combination meter 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.

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

    B

    CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT Click here

    A

  5. CHECK DTC


    1. A01MH1AC01
      *1 Combination Meter Assembly
      *2 Airbag Sensor Assembly

      Connect the connectors to the 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


      Body Electrical > SRS Airbag > Clear DTCs

    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


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

      Tech Tips

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


    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    REPLACE AIRBAG SENSOR ASSEMBLY Click here

  6. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT


    1. Disconnect the connector from the combination meter assembly.

      A01MGM8C01
      *1 Combination Meter Assembly *2 Airbag Sensor Assembly
      *3 Connector C *4 Connector B
      *5 Service Wire - -
      *a

      Front view of wire harness connector

      (to Combination Meter Assembly)

      		 *b

      Rear view of wire harness connector

      (to 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
      G14-4 (P-AB) - Body ground Power switch on (IG) Below 1 V
      G14-3 (PAON) - 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
      G14-4 (P-AB) - G14-3 (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
      G14-4 (P-AB) - G14-3 (PAON) Always 1 MΩ or higher
      G14-4 (P-AB) - Body ground Always 1 MΩ or higher
      G14-3 (PAON) - Body ground Always 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here

    NG

    REPLACE HARNESS AND CONNECTOR

  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 airbag sensor assembly and air conditioning control assembly.

      Result
      Result Proceed to
      The connectors are properly connected A
      The connectors are not properly connected B

    B

    CONNECT CONNECTORS PROPERLY

    A

  8. CHECK CONNECTORS


    1. Disconnect the connectors from the airbag sensor assembly and combination meter assembly.

    2. A01MHFAC04
      *1 Combination Meter Assembly
      *2 Airbag Sensor Assembly

      Check that the connectors (on the airbag sensor assembly side and combination meter assembly side) are not damaged.

      Result
      Result Proceed to
      The connectors are not deformed or damaged A
      The connectors are deformed or damaged B

    B

    REPLACE HARNESS AND CONNECTOR

    A

  9. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT


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

      A01MGM8C01
      *1 Combination Meter Assembly *2 Airbag Sensor Assembly
      *3 Connector C *4 Connector B
      *5 Service Wire - -
      *a

      Front view of wire harness connector

      (to Combination Meter Assembly)

      		 *b

      Rear view of wire harness connector

      (to 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
      G14-4 (P-AB) - Body ground Power switch on (IG) Below 1 V
      G14-3 (PAON) - 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
      G14-4 (P-AB) - G14-3 (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
      G14-4 (P-AB) - G14-3 (PAON) Always 1 MΩ or higher
      G14-4(P-AB) - Body ground Always 1 MΩ or higher
      G14-3 (PAON) - Body ground Always 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE HARNESS AND CONNECTOR

    OK

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


    1. A01MJ0LC27
      *a

      Front view of wire harness connector

      (to Combination Meter Assembly)

      Connect the connectors to the 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
      G13-21 (IG+) - Body ground Power switch on (IG) 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  11. CHECK PASSENGER AIRBAG ON/OFF INDICATOR


    1. A01MJIUC08
      *a

      Rear view of wire harness connector

      (to 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 combination meter 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 (-) 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
      G33-23 (PAON) - Body ground Power switch on (IG) "ON" comes on
      G33-17 (P-AB) - Body ground Power switch on (IG) "OFF" comes on

    10. Disconnect the service wire from airbag sensor assembly.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE COMBINATION METER ASSEMBLY Click here

    OK

  12. CHECK DTC


    1. A01MH1AC02
      *1 Combination Meter Assembly
      *2 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 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


      Body Electrical > SRS Airbag > Clear DTCs

    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


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

      Tech Tips

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


    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    REPLACE AIRBAG SENSOR ASSEMBLY Click here