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 the telltale light assembly (Passenger airbag ON/OFF indicator).

The passenger airbag ON/OFF indicator indicates the operation condition of the front passenger 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

Any of the following conditions is met:


  • The 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.

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

  • Airbag sensor assembly malfunction

  • Instrument panel wire

  • Telltale Light Assembly (Passenger airbag ON/OFF indicator)

  • Airbag sensor assembly

WIRING DIAGRAM

A004GFFE06
*a from GAUGE Fuse
*b Telltale Light Assembly (Passenger Airbag ON/OFF Indicator)
*c Airbag Sensor Assembly

CAUTION / NOTICE / HINT

Note

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. CHECK TELLTALE LIGHT ASSEMBLY (PASSENGER AIRBAG ON/OFF INDICATOR CONDITION)


    1. Turn the ignition switch to 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.

      A004FGVE02

    3. Turn the ignition switch off.

    4. Disconnect the cable from the negative (-) auxiliary battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

      Result
      Result Proceed to
      Always ON A
      OFF B

    B

    CHECK CONNECTION OF CONNECTORS Click here

    A

  2. CHECK CONNECTION OF CONNECTORS


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

    2. Check that the connectors (on the 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 TELLTALE LIGHT ASSEMBLY (PASSENGER AIRBAG ON/OFF INDICATOR)

    A004FHXE02
    Text in Illustration
    *1 Telltale Light Assembly (Passenger Airbag ON/OFF Indicator)

    1. Connect the connector to the telltale light assembly.

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

    3. Turn the ignition switch to ON (IG).

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

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

    5. Turn the ignition switch off.

    6. Disconnect the cable from the negative (-) auxiliary battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.


    NG

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

    OK

  5. CHECK AIRBAG SENSOR ASSEMBLY


    1. Connect the connector to the airbag sensor assembly.

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

    3. Turn the ignition switch to ON (IG), 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 (IG), 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.


    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

    REPLACE AIRBAG SENSOR ASSEMBLY Click here

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


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

      A004FBZE03
      Text in Illustration
      *A w/ Curtain Shield Airbag *B w/o Curtain Shield Airbag
      *1 Telltale Light Assembly (Passenger Airbag ON/OFF Indicator) *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 Telltale Light Assembly)

      		 *b

      Front view of wire harness connector

      (to Airbag Sensor Assembly)

    2. 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 the wire.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F18-2 (PAON) - F18-3 (P-AB) Always Below 1 Ω

    4. Disconnect the service wire from connector B.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F18-2 (PAON) - F18-3 (P-AB) Always 1 MΩ or higher
      F18-2 (PAON) - Body ground Always 1 MΩ or higher
      F18-3 (P-AB) - Body ground Always 1 MΩ or higher

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

    7. Turn the ignition switch to ON (IG).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      F18-2 (PAON) - Body ground Ignition switch ON (IG) Below 1 V
      F18-3 (P-AB) - Body ground Ignition switch ON (IG) Below 1 V

    OK

    REPLACE TELLTALE LAMP ASSEMBLY Click here

    NG

    REPLACE INSTRUMENT PANEL WIRE

  7. CHECK CONNECTION OF CONNECTORS


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

    2. Check that the connectors (on the 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 (AIRBAG SENSOR ASSEMBLY - TELLTALE LIGHT ASSEMBLY)


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

      A004FBZE04
      Text in Illustration
      *A w/ Curtain Shield Airbag *B w/o Curtain Shield Airbag
      *1 Telltale Light Assembly (Passenger Airbag ON/OFF Indicator) *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 Telltale Light Assembly)

      		 *b

      Front view of wire harness connector

      (to Airbag Sensor Assembly)

    2. 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 the wire.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F18-2 (PAON) - F18-3 (P-AB) Always Below 1 Ω

    4. Disconnect the service wire from connector B.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F18-2 (PAON) - F18-3 (P-AB) Always 1 MΩ or higher
      F18-2 (PAON) - Body ground Always 1 MΩ or higher
      F18-3 (P-AB) - Body ground Always 1 MΩ or higher

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

    7. Turn the ignition switch to ON (IG).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      F18-2 (PAON) - Body ground Ignition switch ON (IG) Below 1 V
      F18-3 (P-AB) - Body ground Ignition switch ON (IG) Below 1 V

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

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

    A004EFLE02
    Text in Illustration
    *a

    Front view of wire harness connector

    (to Telltale Light Assembly)

    1. Connect the connectors to the airbag sensor assembly.

    2. Turn the ignition switch to ON (IG).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      F18-8 (LAPB) - Body ground Ignition switch ON (IG) 11 to 14 V

    4. Turn the ignition switch off.

    5. Disconnect the cable from the negative (-) auxiliary battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.


    NG

    REPLACE HARNESS AND CONNECTOR (TELLTALE LIGHT ASSEMBLY - AUXILIARY BATTERY)

    OK

  11. CHECK TELLTALE LAMP ASSEMBLY (PASSENGER AIRBAG ON/OFF INDICATOR)

    A004E54E02
    Text in Illustration
    *a

    Front view of wire harness connector

    (to Airbag Sensor Assembly)

    1. Connect the connector to the telltale light assembly.

    2. Disconnect the connectors from the airbag sensor assembly.

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

    4. Turn the ignition switch to ON (IG).

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

      OK
      Tester Connection Switch Condition Passenger airbag ON/OFF indicator
      F14-23 (PAON) - Body ground Ignition switch ON (IG) "ON" comes on
      F14-17 (P-AB) - Body ground Ignition switch ON (IG) "OFF" comes on

    6. Turn the ignition switch off.

    7. Disconnect the cable from the negative (-) auxiliary battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.


    NG

    REPLACE TELLTALE LAMP ASSEMBLY Click here

    OK

  12. CHECK AIRBAG SENSOR ASSEMBLY


    1. Connect the connectors to the airbag sensor assembly.

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

    3. Turn the ignition switch to ON (IG), 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 (IG), 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.


    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

    REPLACE AIRBAG SENSOR ASSEMBLY Click here