AIRBAG SYSTEM, Diagnostic DTC:B1810/53, B1811/53, B1812/53, B1813/53

DTC Code DTC Name
B1810/53 Short in Driver Side Squib 2nd Step Circuit
B1811/53 Open in Driver Side Squib 2nd Step Circuit
B1812/53 Short to GND in Driver Side Squib 2nd Step Circuit
B1813/53 Short to B+ in Driver Side Squib 2nd Step Circuit

DESCRIPTION

The driver side squib 2nd step circuit consists of the center airbag sensor assembly, the spiral cable, and the steering pad.

The circuit instructs the SRS to deploy when deployment conditions are met.

These DTCs are recorded when a malfunction is detected in the driver side squib 2nd step circuit.

DTC Code Detection Condition Trouble Area
B1810/53

One of the following conditions is met:


  • The center airbag sensor assembly receives a line short circuit signal 5 times in the driver side squib 2nd step circuit the during primary check.

  • Driver side squib 2nd step malfunction

  • Spiral cable malfunction

  • Center airbag sensor assembly malfunction

  • Instrument panel wire

  • Spiral cable

  • Steering pad (Driver side squib 2nd step)

  • Center airbag sensor assembly
B1811/53

One of the following conditions is met:


  • The center airbag sensor assembly receives an open circuit signal in the driver side squib 2nd step circuit for 2 seconds.

  • Driver side squib 2nd step malfunction

  • Spiral cable malfunction

  • Center airbag sensor assembly malfunction

  • Instrument panel wire

  • Spiral cable

  • Steering pad (Driver side squib 2nd step)

  • Center airbag sensor assembly
B1812/53

One of the following conditions is met:


  • The center airbag sensor assembly receives a short circuit to ground signal in the driver side 2nd step circuit for 0.5 seconds.

  • Driver side squib 2nd step malfunction

  • Spiral cable malfunction

  • Center airbag sensor assembly malfunction

  • Instrument panel wire

  • Spiral cable

  • Steering pad (Driver side squib 2nd step)

  • Center airbag sensor assembly
B1813/53

One of the following conditions is met:


  • The center airbag sensor assembly receives a short circuit to B+ signal in the driver side squib 2nd step circuit for 0.5 seconds.

  • Driver side squib 2nd step malfunction

  • Spiral cable malfunction

  • Center airbag sensor assembly malfunction

  • Instrument panel wire

  • Spiral cable

  • Steering pad (Driver side squib 2nd step)

  • Center airbag sensor assembly

WIRING DIAGRAM

A01H1B8E06

INSPECTION PROCEDURE

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.

Tech Tips


  • Perform the simulation method by selecting "check mode" (signal check) with the intelligent tester 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 various types of roads Click here.

PROCEDURE


  1. CHECK STEERING PAD (DRIVER SIDE SQUIB 2ND STEP)

    A01H0ILE27

    1. Turn the power switch OFF.

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

    3. Disconnect the connectors from the steering pad.

    4. Connect the white wire side of SST (resistance: 2.1 Ω) to connector E (black connector).

      CAUTION:

      Never connect the tester to the steering pad (driver side squib 2nd step) for measurement, as this may lead to a serious injury due to airbag deployment.

      Note


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

      • Insert SST straight into the terminals of the connector.

      SST
      09843-18061

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

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

    7. Clear the DTCs Click here.

    8. Turn the power switch OFF.

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

    10. Check for DTCs Click here.

      OK
      DTC B1810, B1811, B1812 or B1813 is not output.

      Tech Tips

      Codes other than DTC B1810, B1811, B1812 and B1813 may be output at this time, but they are not related to this check.


    NG

    CHECK CONNECTOR Click here

    OK

    REPLACE STEERING PAD Click here

  2. CHECK CONNECTOR


    1. Turn the power switch OFF.

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

    3. Disconnect SST from connector E.

    4. Check that the spiral cable connectors (on the steering pad side) are not damaged.

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

    NG

    REPLACE SPIRAL CABLE Click here

    OK

  3. CHECK DRIVER SIDE SQUIB 2ND STEP CIRCUIT

    A01GZVZE28

    1. Disconnect the connectors from the center airbag sensor assembly.

    2. Connect the negative (-) terminal cable to the auxiliary battery, 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
      z12-1 (D2-) - Body ground Power switch ON (IG) Below 1 V
      z12-2 (D2+) - Body ground Power switch ON (IG) Below 1 V

    5. Turn the power switch OFF.

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

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

      Standard resistance
      Tester Connection Condition Specified Condition
      z12-1 (D2-) - z12-2 (D2+) Always Below 1 Ω

    8. Release the activation prevention mechanism built into connector B Click here.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      z12-1 (D2-) - z12-2 (D2+) Always 1 MΩ or higher
      z12-1 (D2-) - Body ground Always 1 MΩ or higher
      z12-2 (D2+) - Body ground Always 1 MΩ or higher

    NG

    CHECK INSTRUMENT PANEL WIRE (CENTER AIRBAG SENSOR ASSEMBLY - SPIRAL CABLE) Click here

    OK

  4. CHECK CENTER AIRBAG SENSOR ASSEMBLY

    A01GXUZE05

    1. Connect the connectors to the steering pad and the center airbag sensor assembly.

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

    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.

      OK
      DTC B1810, B1811, B1812 or B1813 is not output.

      Tech Tips

      Codes other than DTC B1810, B1811, B1812 and B1813 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 (CENTER AIRBAG SENSOR ASSEMBLY - SPIRAL CABLE)

    A01GXL3E12

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

    2. Disconnect the instrument panel wire connector from the spiral cable.

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

    4. Turn the power switch ON (IG).

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      L22-4 (D2+) - Body ground Power switch ON (IG) Below 1 V
      L22-3 (D2-) - Body ground Power switch ON (IG) Below 1 V

    6. Turn the power switch OFF.

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

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

      Standard resistance
      Tester Connection Condition Specified Condition
      L22-4 (D2+) - L22-3 (D2-) Always Below 1 Ω

    9. Release the activation prevention mechanism built into connector B Click here.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      L22-4 (D2+) - L22-3 (D2-) Always 1 MΩ or higher
      L22-4 (D2+) - Body ground Always 1 MΩ or higher
      L22-3 (D2-) - Body ground Always 1 MΩ or higher

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

    REPLACE SPIRAL CABLE Click here