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 air conditioning control 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 stored when a malfunction is detected in the passenger airbag ON/OFF indicator circuit.

DTC No. DTC Detection Condition Trouble Area
B1660/43

  • The center airbag sensor assembly receives a line short circuit signal, 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.

  • Air conditioning control assembly malfunction

  • Center airbag sensor assembly malfunction

  • Instrument panel wire

  • Air conditioning control assembly (Passenger airbag ON/OFF indicator)

  • Center airbag sensor assembly

WIRING DIAGRAM

A003TKAE04

INSPECTION PROCEDURE

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.

      A003T8BE70
      Result
      ON/OFF Indicator Illumination Proceed to
      Always ON A
      OFF B

    B

    CHECK CONNECTORS Click here

    A

  2. CHECK CONNECTORS


    1. Turn the power switch off.

    2. Disconnect the cable from the negative (-) battery terminal.

      CAUTION:

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

    3. Check that the connectors are properly connected to the center airbag sensor assembly and air conditioning control assembly.

      OK
      The connectors are properly connected.

      Tech Tips

      If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

    4. Disconnect the connectors from the center airbag sensor assembly and air conditioning control assembly.

    5. Check that the terminals of the connectors are not damaged.

      OK
      The terminals are not deformed or damaged.

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  3. CHECK PASSENGER AIRBAG ON/OFF INDICATOR


    1. A003T7P

      Connect the connector to the air conditioning control assembly.

    2. Connect the cable to the negative (-) battery terminal.

    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 (OPEN) Click here

    OK

  4. CHECK CENTER AIRBAG SENSOR ASSEMBLY


    1. A003TXEE01
      Text in Illustration
      *1 Air Conditioning Control Assembly
      *2 Center Airbag Sensor Assembly

      Turn the power switch off.

    2. Disconnect the cable from the negative (-) battery terminal.

      CAUTION:

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

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

    4. Connect the cable to the negative (-) battery terminal.

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

    6. Clear the DTCs stored in memory 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.


    NG

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here

  5. CHECK INSTRUMENT PANEL WIRE (OPEN)


    1. Turn the power switch off.

      A003TKKE03

    2. Disconnect the cable from the negative (-) battery terminal.

      CAUTION:

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

    3. Disconnect the connector from the air conditioning control assembly.

    4. Using SST, connect terminals 23 (PAON) and 17 (P-AB) of connector B.

      Note

      Do not forcibly insert SST into the terminals of the connector when connecting the wire.

      SST
      09843-18040

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E76-3 (PAON) - E76-4 (P-AB) Always Below 1 Ω
      Text in Illustration
      *1 Air Conditioning Control Assembly *2 Center Airbag Sensor Assembly
      *3 Instrument Panel Wire *4 Connector B
      *5 Connector C - -
      *a

      Front view of wire harness connector

      (to Center Airbag Sensor Assembly)

      		 *b

      Front view of wire harness connector

      (to Air Conditioning Control Assembly)

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  6. CHECK INSTRUMENT PANEL WIRE (SHORT)


    1. A003SKYE02
      Text in Illustration
      *1 Air Conditioning Control Assembly
      *2 Center Airbag Sensor Assembly
      *3 Instrument Panel Wire
      *4 Connector C
      *a

      Front view of wire harness connector

      (to Air Conditioning Control Assembly)

      Disconnect SST from connector B.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E76-3 (PAON) - E76-4 (P-AB) Always 1 MΩ or higher

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  7. CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)


    1. A003SKYE02
      Text in Illustration
      *1 Air Conditioning Control Assembly
      *2 Center Airbag Sensor Assembly
      *3 Instrument Panel Wire
      *4 Connector C
      *a

      Front view of wire harness connector

      (to Air Conditioning Control Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E76-3 (PAON) - Body ground Always 1 MΩ or higher
      E76-4 (P-AB) - Body ground Always 1 MΩ or higher

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  8. CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)


    1. A003SKYE02
      Text in Illustration
      *1 Air Conditioning Control Assembly
      *2 Center Airbag Sensor Assembly
      *3 Instrument Panel Wire
      *4 Connector C
      *a

      Front view of wire harness connector

      (to Air Conditioning Control Assembly)

      Connect the cable to the negative (-) battery terminal.

    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
      E76-3 (PAON) - Body ground Power switch on (IG) Below 1 V
      E76-4 (P-AB) - Body ground Power switch on (IG) Below 1 V

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

    REPLACE AIR CONDITIONING CONTROL ASSEMBLY Click here

  9. CHECK CONNECTORS


    1. Turn the power switch off.

    2. Disconnect the cable from the negative (-) battery terminal.

      CAUTION:

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

    3. Check that the connectors are properly connected to the center airbag sensor assembly and air conditioning control assembly.

      OK
      The connectors are properly connected.

      Tech Tips

      If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

    4. Disconnect the connectors from the center airbag sensor assembly and air conditioning control assembly.

    5. Check that the terminals of the connectors are not damaged.

      OK
      The terminals are not deformed or damaged.

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  10. CHECK INSTRUMENT PANEL WIRE (OPEN)


    1. Using SST, connect terminals 23 (PAON) and 17 (P-AB) of connector B.

      A003TKKE03

      Note

      Do not forcibly insert SST into the terminals of the connector when connecting the wire.

      SST
      09843-18040

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E76-3 (PAON) - E76-4 (P-AB) Always Below 1 Ω
      Text in Illustration
      *1 Air Conditioning Control Assembly *2 Center Airbag Sensor Assembly
      *3 Instrument Panel Wire *4 Connector B
      *5 Connector C - -
      *a

      Front view of wire harness connector

      (to Center Airbag Sensor Assembly)

      		 *b

      Front view of wire harness connector

      (to Air Conditioning Control Assembly)

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  11. CHECK INSTRUMENT PANEL WIRE (SHORT)


    1. A003SKYE02
      Text in Illustration
      *1 Air Conditioning Control Assembly
      *2 Center Airbag Sensor Assembly
      *3 Instrument Panel Wire
      *4 Connector C
      *a

      Front view of wire harness connector

      (to Air Conditioning Control Assembly)

      Disconnect SST from connector B.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E76-3 (PAON) - E76-4 (P-AB) Always 1 MΩ or higher

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  12. CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)


    1. A003SKYE02
      Text in Illustration
      *1 Air Conditioning Control Assembly
      *2 Center Airbag Sensor Assembly
      *3 Instrument Panel Wire
      *4 Connector C
      *a

      Front view of wire harness connector

      (to Air Conditioning Control Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E76-3 (PAON) - Body ground Always 1 MΩ or higher
      E76-4 (P-AB) - Body ground Always 1 MΩ or higher

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  13. CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)


    1. A003SKYE02
      Text in Illustration
      *1 Air Conditioning Control Assembly
      *2 Center Airbag Sensor Assembly
      *3 Instrument Panel Wire
      *4 Connector C
      *a

      Front view of wire harness connector

      (to Air Conditioning Control Assembly)

      Connect the cable to the negative (-) battery terminal.

    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
      E76-3 (PAON) - Body ground Power switch on (IG) Below 1 V
      E76-4 (P-AB) - Body ground Power switch on (IG) Below 1 V

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  14. CHECK AIR CONDITIONING CONTROL ASSEMBLY (SOURCE VOLTAGE)


    1. A003TH1E02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Air Conditioning Control Assembly)

      Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      E76-2 (IG+) - Body ground Power switch on (IG) 10 to 14 V

    NG

    REPLACE WIRE HARNESS OR BATTERY

    OK

  15. CHECK PASSENGER AIRBAG ON/OFF INDICATOR


    1. A003TL7E09
      Text in Illustration
      *1 Air Conditioning Control Assembly
      *2 Center Airbag Sensor Assembly
      *3 Instrument Panel Wire
      *4 Connector B
      *a

      Front view of wire harness connector

      (to Center Airbag Sensor Assembly)

      Turn the power switch off.

    2. Disconnect the cable from the negative (-) battery terminal.

      CAUTION:

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

    3. Connect the connector to the air conditioning control assembly.

    4. Connect the cable to the negative (-) battery terminal.

    5. Turn the power switch on (IG).

    6. Check the indicator according to the conditions in the table below.

      Result
      Tester Connection Switch Condition Specified Condition
      E14-23 (PAON) - Body ground Power switch on (IG) "ON" comes on
      E14-17 (P-AB) - Body ground Power switch on (IG) "OFF" comes on

    NG

    REPLACE AIR CONDITIONING CONTROL ASSEMBLY Click here

    OK

  16. CHECK CENTER AIRBAG SENSOR ASSEMBLY


    1. A003TXEE01
      Text in Illustration
      *1 Air Conditioning Control Assembly
      *2 Center Airbag Sensor Assembly

      Turn the power switch off.

    2. Disconnect the cable from the negative (-) battery terminal.

      CAUTION:

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

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

    4. Connect the cable to the negative (-) battery terminal.

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

    6. Clear the DTCs stored in memory 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.


    NG

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here