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

SYSTEM DESCRIPTION

The front passenger side squib circuit consists of the center airbag sensor and front passenger airbag. The circuit instructs the SRS to deploy when deployment conditions are met. These DTCs are recorded when a malfunction is detected in the front passenger side squib circuit.

DTC No. DTC Detection Condition Trouble Area
B1805/52 Center airbag sensor assembly receives line short circuit signal 5 times in passenger squib circuit during primary check

  • Front passenger airbag assembly (passenger squib)

  • Center airbag sensor assembly

  • Instrument panel wire
B1806/52 Center airbag sensor assembly receives open circuit signal in passenger squib circuit for 2 seconds

  • Front passenger airbag assembly (passenger squib)

  • Center airbag sensor assembly

  • Instrument panel wire
B1807/52 Center airbag sensor assembly receives short circuit to ground signal in passenger squib circuit for 0.5 seconds

  • Front passenger airbag assembly (passenger squib)

  • Center airbag sensor assembly

  • Instrument panel wire
B1808/52 Center airbag sensor assembly receives B+ short circuit signal in passenger squib circuit for 0.5 seconds

  • Front passenger airbag assembly (passenger squib)

  • Center airbag sensor assembly

  • Instrument panel wire

WIRING DIAGRAM

A01J7I3E16

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK FRONT PASSENGER AIRBAG ASSEMBLY (PASSENGER SQUIB)

    A01J6QWE03

    1. Turn the ignition switch OFF.

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

    3. Disconnect the connector to the front passenger airbag.

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

      SST
      09843-18060

      CAUTION:

      Never connect a tester to the front passenger airbag (passenger 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.

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

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

    7. Clear the DTCs Click here.

    8. Turn the ignition switch OFF.

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

    10. Check for DTCs Click here.

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

      Tech Tips

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


    OK

    REPLACE FRONT PASSENGER AIRBAG ASSEMBLY

    NG

  2. CHECK CONNECTOR


    1. Turn the ignition switch OFF.

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

    3. Disconnect SST (resistance 2.1 Ω) from the instrument panel wire.

    4. Check that the instrument panel wire connectors (on the front passenger side airbag) are not damaged.

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

    NG

    CHECK NO. 2 INSTRUMENT PANEL WIRE Click here

    OK

  3. CHECK INSTRUMENT PANEL WIRE (PASSENGER SQUIB CIRCUIT)

    A01J7CGE03

    1. Disconnect the connector from the center airbag sensor.

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

    3. Turn the ignition switch ON.

    4. Measure the voltage of the wire harness side connector.

      Standard voltage
      Tester Connection Specified Condition
      A25-1 (P+) - Body ground Below 1 V
      A25-2 (P-) - Body ground Below 1 V

    5. Turn the ignition switch OFF.

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

    7. Measure the resistance of the wire harness side connector.

      Standard resistance
      Tester Connection Specified Condition
      A25-1 (P+) - A25-2 (P-) Below 1 Ω
      A25-1 (P+) - Body ground 1 MΩ or higher
      A25-2 (P-) - Body ground 1 MΩ or higher

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

    9. Measure the resistance of the wire harness side connector.

      Standard resistance
      Tester Connection Specified Condition
      A25-1 (P+) - A25-2 (P-) 1 MΩ or higher

    OK

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY

    NG

  4. CHECK NO. 2 INSTRUMENT PANEL WIRE

    A01J7COE06

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

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

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

    4. Turn the ignition switch ON.

    5. Measure the voltage of the wire harness side connector.

      Standard voltage
      Tester Connection Specified Condition
      A25-1 (P+) - Body ground Below 1 V
      A25-2 (P-) - Body ground Below 1 V

    6. Turn the ignition switch OFF.

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

    8. Measure the resistance of the wire harness side connector.

      Standard resistance
      Tester Connection Specified Condition
      A25-1 (P+) - A25-2 (P-) Below 1 Ω
      A25-1 (P+) - Body ground 1 MΩ or higher
      A25-2 (P-) - Body ground 1 MΩ or higher

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

    10. Measure the resistance of the wire harness side connector.

      Standard resistance
      Tester Connection Specified Condition
      A25-1 (P+) - A25-2 (P-) 1 MΩ or higher

    NG

    REPAIR OR REPLACE NO. 2 INSTRUMENT PANEL WIRE

    OK

    REPAIR OR REPLACE INSTRUMENT PANEL WIRE