AIRBAG SYSTEM, Diagnostic DTC:B1810/53

DTC Code DTC Name
B1810/53 Short in Driver Side Squib 2nd Step Circuit

DESCRIPTION

The driver side squib 2nd step circuit consists of the airbag sensor assembly, spiral cable with sensor sub-assembly and horn button assembly.

The airbag sensor assembly uses this circuit to deploy the airbag when deployment conditions are met.

DTC B1810/53 is stored when a line short is detected in the driver side squib 2nd step circuit.

DTC No. Detection Item DTC Detection Condition Trouble Area Test Mode / Check Mode
B1810/53 Short in Driver Side Squib 2nd Step Circuit

  • The airbag sensor assembly detects a line short in the driver side squib 2nd step circuit during primary check.

  • Spiral cable with sensor sub-assembly malfunction

  • Driver side squib 2nd step malfunction

  • Airbag sensor assembly malfunction

  • Instrument panel wire

  • Spiral cable with sensor sub-assembly

  • Driver side squib 2nd step (Horn button assembly)

  • Airbag sensor assembly

 Applies to check mode

WIRING DIAGRAM

A01MI3DE83
*a Driver Side Squib 2nd Step (Horn Button Assembly)
*b Spiral Cable with Sensor Sub-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

Tech Tips


  • Perform the simulation method by selecting check mode (Signal Check) using the GTS.

    Click here

  • After selecting check mode (Signal Check), perform the simulation method by wiggling each connector of the airbag system or driving the vehicle on a city road or rough road.

    Click here

PROCEDURE


  1. CHECK CONNECTORS


    1. A01MFVQC01
      *1 Horn Button Assembly
      *2 Spiral Cable with Sensor Sub-assembly
      *3 Airbag Sensor Assembly
      *4 Instrument Panel Wire

      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 horn button assembly, spiral cable with sensor sub-assembly and airbag sensor assembly.

      OK
      The connectors are properly connected.

      Tech Tips

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

    4. Disconnect the connectors from the horn button assembly, spiral cable with sensor sub-assembly and airbag sensor assembly.

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

      OK
      The terminals are not deformed or damaged.

    6. Check that the spiral cable with sensor sub-assembly connector (on the horn button assembly side) is not damaged.

      OK
      The connector locking button is not disengaged, or the claw of the lock is not deformed or damaged.

    7. Check that the short springs for the instrument panel wire and spiral cable with sensor sub-assembly with the activation prevention mechanism are not deformed or damaged.

      OK
      The short springs are not deformed or damaged.
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE WIRE HARNESS

    OK

  2. CHECK DRIVER SIDE SQUIB 2ND STEP CIRCUIT


    1. A01MGJPC11
      *1 Horn Button Assembly
      *2 Spiral Cable with Sensor Sub-assembly
      *3 Airbag Sensor Assembly
      *a

      Front view of wire harness connector

      (to Horn Button Assembly)
      *b Color: Orange

      Connect the instrument panel wire to the spiral cable with sensor sub-assembly.

    2. Check for a short in the circuit.


      1. Release the activation prevention mechanism built into connector B.

        Click here

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        z6-2 (D2+) - z6-1 (D2-) Always 1 MΩ or higher

      3. Restore the released activation prevention mechanism of connector B to the original condition.

      Result
      Proceed to
      OK
      NG

    NG

    CHECK INSTRUMENT PANEL WIRE Click here

    OK

  3. CHECK DTC


    1. A01MJIAC01
      *1 Horn Button Assembly
      *2 Spiral Cable with Sensor Sub-assembly
      *3 Airbag Sensor Assembly

      Connect the connectors to the airbag sensor assembly.

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

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

    4. Clear the DTCs stored in memory.

      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
      OK
      DTC B1810/53 is not output.

      Tech Tips

      Codes other than DTC B1810/53 may be output at this time, but they are not related to this check.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE AIRBAG SENSOR ASSEMBLY Click here

    OK

  4. CHECK DTC


    1. A01MJGBC01
      *1 Horn Button Assembly
      *2 Spiral Cable with Sensor Sub-assembly
      *3 Airbag Sensor Assembly

      Connect the connectors to the horn button assembly.

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

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

    4. Clear the DTCs stored in memory.

      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
      OK
      DTC B1810/53 is not output.

      Tech Tips

      Codes other than DTC B1810/53 may be output at this time, but they are not related to this check.

      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

    REPLACE HORN BUTTON ASSEMBLY Click here

  5. CHECK INSTRUMENT PANEL WIRE


    1. A01MH5SC02
      *1 Horn Button Assembly
      *2 Spiral Cable with Sensor Sub-assembly
      *3 Airbag Sensor Assembly
      *4 Instrument Panel Wire
      *a

      Front view of wire harness connector

      (to Spiral Cable with Sensor Sub-assembly)

      Disconnect the instrument panel wire from the spiral cable with sensor sub-assembly.

    2. Check for a short in the circuit.


      1. Release the activation prevention mechanism built into connector B.

        Click here

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        G50-4 (D2+) - G50-3 (D2-) Always 1 MΩ or higher

      3. Restore the released activation prevention mechanism of connector B to the original condition.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  6. CHECK SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY


    1. A01MG2PC11
      *1 Horn Button Assembly
      *2 Spiral Cable with Sensor Sub-assembly
      *3 Airbag Sensor Assembly
      *4 Instrument Panel Wire
      *a

      Front view of wire harness connector

      (to Horn Button Assembly)
      *b Color: Orange

      Check for a short in the circuit.


      1. Release the activation prevention mechanism built into connector D.

        Click here

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        z6-2 (D2+) - z6-1 (D2-) Always 1 MΩ or higher

      3. Restore the released activation prevention mechanism of connector D to the original condition.

      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

    REPLACE SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY Click here