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

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

DESCRIPTION

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

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

These DTCs are set when a malfunction is detected in the P squib circuit.

DTC No. DTC Detecting Conditions Trouble Areas
B1805

  • Center airbag sensor assembly receives line short circuit signal in P squib circuit 5 times during check

  • P squib malfunction

  • Center airbag sensor assembly malfunction

  • Instrument panel wire

  • Instrument panel wire No. 3

  • Front passenger airbag assembly (P squib)

  • Center airbag sensor assembly
B1806

  • Center airbag sensor assembly receives open circuit signal in P squib circuit for 2 seconds

  • P squib malfunction

  • Center airbag sensor assembly malfunction

  • Instrument panel wire

  • Instrument panel wire No. 3

  • Front passenger airbag assembly (P squib)

  • Center airbag sensor assembly
B1807

  • Center airbag sensor assembly receives short circuit to ground signal in P squib circuit for 0.5 seconds

  • P squib malfunction

  • Center airbag sensor assembly malfunction

  • Instrument panel wire

  • Instrument panel wire No. 3

  • Front passenger airbag assembly (P squib)

  • Center airbag sensor assembly
B1808

  • Center airbag sensor assembly receives short circuit to B+ signal in P squib circuit for 0.5 seconds

  • P squib malfunction

  • Center airbag sensor assembly malfunction

  • Instrument panel wire

  • Instrument panel wire No. 3

  • Front passenger airbag assembly (P squib)

  • Center airbag sensor assembly

WIRING DIAGRAM

A0135ZKE01

INSPECTION PROCEDURE

Tech Tips

Perform a check mode inspection after repairing the squib system to check if the repair has done correctly Click here.

PROCEDURE


  1. CHECK FRONT PASSENGER AIRBAG ASSEMBLY

    SST
    09843-18060

    1. Turn the ignition switch to the LOCK position.

    2. A01368SE01

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

    3. Disconnect the connectors from the front passenger airbag assembly.

    4. Connect the white wire side of SST (resistance 2.1 Ω) to the instrument panel wire No. 3.

      CAUTION:

      Never connect a tester to the front passenger airbag assembly (D squib) for measurement, as this may lead to a serious injury due to airbag deployment.

      Note


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

      • Insert the SST straight into the terminals of the connector.

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

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

    7. Clear the DTCs stored in memory Click here.

    8. Turn the ignition switch to the LOCK position.

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

    10. Check the DTCs Click here.

      OK
      DTC B1805, B1806, B1807 and B1808 are not output.

    OK

    REPLACE FRONT PASSENGER AIRBAG ASSEMBLY

    NG

  2. CHECK CONNECTOR


    1. Turn the ignition switch to the LOCK position.

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

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

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

    NG

    REPLACE INSTRUMENT PANEL WIRE NO.3

    OK

  3. CHECK CONNECTION OF CONNECTOR


    1. Check that the connectors are properly connected to the center airbag sensor assembly and the instrument panel wire No. 3.

      OK
      The connectors are properly connected.

    NG

    CONNECT CONNECTOR

    OK

  4. CHECK INSTRUMENT PANEL WIRE NO.3

    A013801E01

    1. Disconnect the instrument panel wire No. 3 connectors from the instrument panel wire and front passenger airbag assembly.

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

    3. Turn the ignition switch to the ON position.

    4. Measure the voltage.

      Standard Voltage
      Tester Connection Condition Specified Condition

      L1-2 (P+) -

      Body ground

      		 Ignition switch ON Below 1 V

      L1-1 (P-) -

      Body ground

      		 Ignition switch ON Below 1 V

    5. Turn the ignition switch to the LOCK position.

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

    7. Measure the resistance.

      Standard Resistance
      Tester Connection Condition Specified Condition
      L1-2 (P+) - L1-1 (P-) Always Below 1 Ω

      L1-2 (P+) -

      Body ground

      		 Always 1 MΩ or Higher

      L1-1 (P-) -

      Body ground

      		 Always 1 MΩ or Higher

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

    9. Measure the resistance.

      Standard Resistance
      Tester Connection Condition Specified Condition
      L1-2 (P+) - L1-1 (P-) Always 1 MΩ or Higher

    NG

    REPLACE INSTRUMENT PANEL WIRE NO.3

    OK

  5. CHECK INSTRUMENT PANEL WIRE (P SQUIB CIRCUIT)

    A0135XKE01

    1. Disconnect the instrument panel wire connector from the center airbag sensor assembly.

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

    3. Turn the ignition switch to the ON position.

    4. Measure the voltage.

      Standard Voltage
      Tester Connection Condition Specified Condition

      CL1-1 (P+) -

      Body ground

      		 Ignition switch ON Below 1 V

      CL1-2 (P-) -

      Body ground

      		 Ignition switch ON Below 1 V

    5. Turn the ignition switch to the LOCK position.

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

    7. Measure the resistance.

      Standard Resistance
      Tester Connection Condition Specified Condition
      CL1-1 (P+) - CL1-2 (P-) Always Below 1 Ω

      CL1-1 (P+) -

      Body ground

      		 Always 1 MΩ or Higher

      CL1-2 (P-) -

      Body ground

      		 Always 1 MΩ or Higher

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

    9. Measure the resistance.

      Standard Resistance
      Tester Connection Condition Specified Condition
      CL1-1 (P+) - CL1-2 (P-) Always 1 MΩ or Higher

    NG

    REPLACE INSTRUMENT PANEL WIRE

    OK

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY