AIRBAG SYSTEM, Diagnostic DTC:B1148/36

DTC Code DTC Name
B1148/36 Short in Airbag Sensor Assembly No. 2 Circuit (To B+)

DESCRIPTION

The airbag sensor assembly No. 2 consists of the diagnosis circuit and frontal deceleration sensor, etc..

If receives signals from the frontal deceleration sensor, judges whether the SRS must be activated or not, and detects a diagnosis system malfunction.

DTC B1148/36 is recorded when occurrence of a malfunction in the airbag sensor assembly No. 2 is detected.

DTC No. DTC Detecting Condition Trouble Area
B1135/24

  • Airbag sensor assembly No. 2 malfunction

  • Airbag sensor assembly No. 2

  • Cowl wire

WIRING DIAGRAM

A01KGNXE01

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK AIR BAG SENSOR ASSEMBLY NO.2

    SST
    09843-18040

    1. A01KFATE01
      Text in Illustration
      *1 Airbag Sensor Assembly No. 2
      *2 Airbag ECU Assembly
      *3 DLC3
      *a DTC B1148/36

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

    2. Turn the ignition switch to ON and wait at least for 20 seconds.

    3. Clear the DTC stored in memory Click here.

    4. Turn the ignition switch to LOCK, and wait at least for 20 seconds.

    5. Turn the ignition switch to ON, and wait at least for 60 seconds.

    6. Check the DTC Click here.

      OK
      DTC B1148/36 is not output.

      Tech Tips

      Codes other than code B1148/36 may be output at this time, but they are not relevant to this check.


    NG

    CHECK AIRBAG SENSOR ASSEMBLY NO.2 CONNECTOR Click here

    OK

    USE SIMULATION METHOD TO CHECK

  2. CHECK AIRBAG SENSOR ASSEMBLY NO.2 CONNECTOR


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

    2. Check the connection of the airbag sensor assembly No. 2 connector.


    NG

    CONNECT CONNECTORS

    OK

  3. CHECK AIRBAG ECU ASSEMBLY CONNECTOR


    1. Check the connection of the airbag ECU assembly connector.


    NG

    CONNECT CONNECTORS

    OK

  4. CHECK COWL WIRE (AIRBAG ECU ASSEMBLY-AIRBAG SENSOR ASSEMBLY NO.2)


    1. A01KFBEE01
      Text in Illustration
      *1 Airbag Sensor Assembly No. 2
      *2 Airbag ECU Assembly

      Disconnect the connector between the airbag ECU assembly and the airbag sensor assembly No. 2.

    2. For the connector (on the airbag sensor assembly No. 2 side) between the airbag ECU assembly and the airbag sensor assembly No. 2, measure the resistance between VFR, EFR and body ground.

      OK
      Resistance: 1MΩ or Higher

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

    4. Turn the ignition switch to ON.

    5. For the connector (on the airbag sensor assembly No. 2 side) between the airbag ECU assembly and the airbag sensor assembly No. 2, measure the voltage between VFR, EFR and body ground.

      OK
      Voltage: Below 1 V

    NG

    REPAIR OR REPLACE COWL WIRE

    OK

  5. CHECK AIR BAG SENSOR ASSEMBLY NO.2

    SST
    09843-18040

    1. A01KIL7E01
      Text in Illustration
      *1 Airbag Sensor Assembly No. 2
      *2 Airbag ECU Assembly
      *3 DLC3
      *a DTC B1148/36

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

    2. Connect the connector to the airbag ECU assembly.

    3. Using SST, connect VFR and EFR of the connector (on the airbag sensor assembly No. 2 side) between the airbag ECU assembly and the airbag sensor assembly No. 2.

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

    5. Turn the ignition switch to ON, and wait at least for 20 seconds.

    6. Clear the DTC stored in memory Click here.

    7. Turn the ignition switch to ON, and wait at least for 60 seconds.

    8. Check the DTC Click here.

      OK
      DTC B1148/36 is not output.

      Tech Tips

      Codes other than code B1148/36 may be output at this time, but they are not relevant to this check.


    NG

    REPLACE AIR BAG SENSOR ASSEMBLY NO.2

    OK

    USE SIMULATION METHOD TO CHECK