AIRBAG SYSTEM, Diagnostic DTC:B1805/52, B1806/52, B1807/52, B1808/52

DTC Code DTC Name
B1805/52 Short in Front Passenger Side Squib Circuit
B1806/52 Open in Front Passenger Side Squib Circuit
B1807/52 Short to GND in Front Passenger Side Squib Circuit
B1808/52 Short to B+ in Front Passenger Side Squib Circuit

DESCRIPTION

The front passenger side squib circuit consists of the center airbag sensor assembly and front passenger airbag assembly.

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

These DTCs are stored when a malfunction is detected in the front passenger side squib circuit.

DTC No. DTC Detection Condition Trouble Area
B1805/52

  • The center airbag sensor assembly receives a line short circuit signal in the front passenger side squib circuit during primary check.

  • Front passenger side squib malfunction

  • Center airbag sensor assembly malfunction

  • Instrument panel wire

  • No. 3 instrument panel wire

  • Front passenger airbag assembly (Front passenger side squib)

  • Center airbag sensor assembly
B1806/52

  • The center airbag sensor assembly receives an open circuit signal in the front passenger side squib circuit.

  • Front passenger side squib malfunction

  • Center airbag sensor assembly malfunction

  • Instrument panel wire

  • No. 3 instrument panel wire

  • Front passenger airbag assembly (Front passenger side squib)

  • Center airbag sensor assembly
B1807/52

  • The center airbag sensor assembly receives a short circuit to ground signal in the front passenger side squib circuit.

  • Front passenger side squib malfunction

  • Center airbag sensor assembly malfunction

  • Instrument panel wire

  • No. 3 instrument panel wire

  • Front passenger airbag assembly (Front passenger side squib)

  • Center airbag sensor assembly
B1808/52

  • The center airbag sensor assembly receives a short circuit to B+ signal in the front passenger side squib circuit.

  • Front passenger side squib malfunction

  • Center airbag sensor assembly malfunction

  • Instrument panel wire

  • No. 3 instrument panel wire

  • Front passenger airbag assembly (Front passenger side squib)

  • Center airbag sensor assembly

WIRING DIAGRAM

A01JCDBE45

INSPECTION PROCEDURE

Tech Tips


  • Perform the simulation method by selecting check mode (Signal Check) using 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 a city or rough road Click here.

PROCEDURE


  1. CHECK CONNECTORS


    1. A01JA8YE05
      Text in Illustration
      *1 Front Passenger Side Squib
      *2 Center Airbag Sensor Assembly
      *3 No. 3 Instrument Panel Wire
      *4 Instrument Panel Wire

      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 front passenger airbag assembly and center airbag sensor assembly. Also check that the connectors that link the instrument panel wire and No. 3 instrument panel wire are properly connected.

      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 front passenger airbag assembly and center airbag sensor assembly. Also disconnect the instrument panel wire from the No. 3 instrument panel wire.

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

      OK
      The terminals are not deformed or damaged.

    6. Check that the No. 3 instrument panel wire connector (on the front passenger airbag assembly side) is not damaged.

      OK
      The lock 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 No. 3 instrument panel wire with the activation prevention mechanism are not deformed or damaged.

      OK
      The short springs are not deformed or damaged.

    NG

    REPLACE WIRE HARNESS

    OK

  2. CHECK FRONT PASSENGER AIRBAG ASSEMBLY (FRONT PASSENGER SIDE SQUIB)


    1. A01JC9WE08
      Text in Illustration
      *1 Front Passenger Side Squib
      *2 Center Airbag Sensor Assembly
      *3

      Front view of wire harness connector

      (to Front Passenger Airbag Assembly)
      *4 Connector E

      Connect the instrument panel wire to the No. 3 instrument panel wire and center airbag sensor assembly.

    2. Connect SST (resistance 2.1 Ω) to connector E.

      CAUTION:

      Never connect the tester to the front passenger airbag assembly (front passenger side squib) 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.

      • Insert SST straight into the terminals of the connector.

      SST
      09843-18061

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

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

    5. Clear the DTCs stored in the memory Click here.

    6. Turn the power switch off.

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

    8. Check for DTCs Click here.

      OK
      DTC B1805, B1806, B1807, B1808 or 52 is not output.

      Tech Tips

      Codes other than DTCs B1805, B1806, B1807, B1808 and 52 may be output at this time, but they are not related to this check.


    NG

    CHECK FRONT PASSENGER SIDE SQUIB CIRCUIT Click here

    OK

    REPLACE FRONT PASSENGER AIRBAG ASSEMBLY Click here

  3. CHECK FRONT PASSENGER SIDE SQUIB CIRCUIT


    1. A01JAT4E06
      Text in Illustration
      *1 Front Passenger Side Squib
      *2 Center Airbag Sensor Assembly
      *3

      Front view of wire harness connector

      (to Front Passenger Airbag Assembly)
      *4 Connector E

      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. Disconnect SST from connector E.

    4. Disconnect the instrument panel wire from the center airbag sensor assembly.

    5. Check for a short to B+ in the circuit.


      1. 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
        J1-1 (P+) - Body ground Power switch on (IG) Below 1 V
        J1-2 (P-) - Body ground Power switch on (IG) Below 1 V

    6. Check for an open in the circuit.


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

        Standard Resistance
        Tester Connection Condition Specified Condition
        J1-1 (P+) - J1-2 (P-) Always Below 1 Ω

    7. Check for a short to ground in the circuit.


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

        Standard Resistance
        Tester Connection Condition Specified Condition
        J1-1 (P+) - Body ground Always 1 MΩ or higher
        J1-2 (P-) - Body ground Always 1 MΩ or higher

    8. 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
        J1-1 (P+) - J1-2 (P-) Always 1 MΩ or higher

    NG

    CHECK INSTRUMENT PANEL WIRE Click here

    OK

  4. CHECK CENTER AIRBAG SENSOR ASSEMBLY


    1. A01JCJIE03
      Text in Illustration
      *1 Front Passenger Side Squib
      *2 Center Airbag Sensor Assembly

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

    2. Connect the connectors to the front passenger airbag assembly and center airbag sensor assembly.

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

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

    5. Clear the DTCs stored in the memory Click here.

    6. Turn the power switch off.

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

    8. Check for DTCs Click here.

      OK
      DTC B1805, B1806, B1807, B1808 or 52 is not output.

      Tech Tips

      Codes other than DTCs B1805, B1806, B1807, B1808 and 52 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


    1. A01JD89E05
      Text in Illustration
      *1 Front Passenger Side Squib
      *2 Center Airbag Sensor Assembly
      *3 No. 3 Instrument Panel Wire
      *4 Instrument Panel Wire
      *5

      Front view of wire harness connector

      (to No. 3 Instrument Panel Wire)
      *6 Connector C

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

    2. Disconnect the No. 3 instrument panel wire from the instrument panel wire.

    3. Check for a short to B+ in the circuit.


      1. 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
        LJ1-1 (P+) - Body ground Power switch on (IG) Below 1 V
        LJ1-2 (P-) - Body ground Power switch on (IG) Below 1 V

    4. Check for an open in the circuit.


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

        Standard Resistance
        Tester Connection Condition Specified Condition
        LJ1-1 (P+) - LJ1-2 (P-) Always Below 1 Ω

    5. Check for a short to ground in the circuit.


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

        Standard Resistance
        Tester Connection Condition Specified Condition
        LJ1-1 (P+) - Body ground Always 1 MΩ or higher
        LJ1-2 (P-) - Body ground Always 1 MΩ or higher

    6. 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
        LJ1-1 (P+) - LJ1-2 (P-) Always 1 MΩ or higher

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

  6. CHECK NO. 3 INSTRUMENT PANEL WIRE


    1. A01JBI6E06
      Text in Illustration
      *1 Front Passenger Side Squib
      *2 Center Airbag Sensor Assembly
      *3 No. 3 Instrument Panel Wire
      *4 Instrument Panel Wire
      *5

      Front view of wire harness connector

      (to Front Passenger Airbag Assembly)
      *6 Connector E

      Check for a short to B+ in the circuit.


      1. 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
        J1-1 (P+) - Body ground Power switch on (IG) Below 1 V
        J1-2 (P-) - Body ground Power switch on (IG) Below 1 V

    2. Check for an open in the circuit.


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

        Standard Resistance
        Tester Connection Condition Specified Condition
        J1-1 (P+) - J1-2 (P-) Always Below 1 Ω

    3. Check for a short to ground in the circuit.


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

        Standard Resistance
        Tester Connection Condition Specified Condition
        J1-1 (P+) - Body ground Always 1 MΩ or higher
        J1-2 (P-) - Body ground Always 1 MΩ or higher

    4. 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
        J1-1 (P+) - J1-2 (P-) Always 1 MΩ or higher

    NG

    REPLACE NO. 3 INSTRUMENT PANEL WIRE

    OK

    USE SIMULATION METHOD TO CHECK Click here