AIRBAG SYSTEM(w/ Occupant Classification System), Diagnostic DTC:B1815/54,B1816/54,B1817/54 and B1818/54

DESCRIPTION

WIRING DIAGRAM

CAUTION / NOTICE / HINT

PROCEDURE

1. CHECK INSTRUMENT PANEL PASSENGER AIRBAG ASSEMBLY (FRONT PASSENGER SIDE SQUIB 2ND STEP)

   1. 

      *1	Front Passenger Side Squib 2nd Step
      *2	Airbag Sensor Assembly
      *3	Connector E
      *4	SST
      *a	Front view of wire harness connector (to Front Passenger Side Squib 2nd Step)
      *b	Color: Black

      Turn the ignition switch off.

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

   3. Disconnect the connectors from the instrument panel passenger airbag.

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

      CAUTION:

      Never connect the tester to the curtain shield airbag assembly RH (curtain shield squib RH) 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.

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

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

   7. Clear the DTCs.

      Click here

      Body Electrical > SRS Airbag > Clear DTCs

   8. Turn the ignition switch off.

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

   10. Check for DTCs.

       Click here

       Body Electrical > SRS Airbag > Trouble Codes

       Result

       Proceed to
       DTC B1815/54, B1816/54, B1817/54 or B1818/54 is not output
       DTC B1815/54, B1816/54, B1817/54 or B1818/54 is output

       Tip:

       Codes other than DTC B1815/54, B1816/54, B1817/54 and B1818/54 may be output at this time, but they are not related to this check.

   11. Turn the ignition switch off.

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

   13. Disconnect SST from connector E.

   09843-18061

   DTC B1815/54, B1816/54, B1817/54 or B1818/54 is not output

   REPLACE INSTRUMENT PANEL PASSENGER AIRBAG ASSEMBLY

   Click here

   DTC B1815/54, B1816/54, B1817/54 or B1818/54 is output

2. CHECK CONNECTOR

   1. Disconnect the connectors from the airbag sensor assembly.

   2. 

      *1	Front Passenger Side Squib 2nd Step
      *2	Airbag Sensor Assembly

      Check that the connectors (on the airbag sensor assembly side and instrument panel passenger airbag side) are not damaged.

      OK

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

   Result

   Proceed to
   OK
   NG

   NG

   REPLACE HARNESS AND CONNECTOR

   OK

3. CHECK FRONT PASSENGER SIDE SQUIB 2ND STEP CIRCUIT

   1. 

      *1	Front Passenger Side Squib 2nd Step
      *2	Airbag Sensor Assembly
      *3	Connector E
      *a	Front view of wire harness connector (to Front Passenger Side Squib 2nd Step)
      *b	Color: Black

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

   2. Turn the ignition switch to ON.

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

      Standard Voltage

      Tester Connection	Switch Condition	Specified Condition
      b2-2 (P2+) - Body ground	Ignition switch ON	Below 1 V
      b2-1 (P2-) - Body ground	Ignition switch ON	Below 1 V

   4. Turn the ignition switch off.

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

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

      Standard Resistance

      Tester Connection	Condition	Specified Condition
      b2-2 (P2+) - b2-1 (P2-)	Always	Below 1 Ω

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

      Click here

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

      Standard Resistance

      Tester Connection	Condition	Specified Condition
      b2-2 (P2+) -b2-1 (P2-)	Always	1 MΩ or higher

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

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

       Standard Resistance

       Tester Connection	Condition	Specified Condition
       b2-2 (P2+) - Body ground	Always	1 MΩ or higher
       b2-1 (P2-) - Body ground	Always	1 MΩ or higher

   Result

   Proceed to
   OK
   NG

   NG

   CHECK INSTRUMENT PANEL WIREClick here

   OK

4. CHECK AIRBAG SENSOR ASSEMBLY

   1. 

      *1	Front Passenger Side Squib 2nd Step
      *2	Airbag Sensor Assembly

      Connect the connectors to the instrument panel passenger airbag and airbag sensor assembly.

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

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

   4. Clear the DTCs.

      Click here

      Body Electrical > SRS Airbag > Clear DTCs

   5. Turn the ignition switch off.

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

   7. Check for DTCs.

      Click here

      Body Electrical > SRS Airbag > Trouble Codes

      Result

      Proceed to
      DTC B1815/54, B1816/54, B1817/54 or B1818/54 is not output
      DTC B1815/54, B1816/54, B1817/54 or B1818/54 is output

      Tip:

      Codes other than DTC B1815/54, B1816/54, B1817/54 and B1818/54 may be output at this time, but they are not related to this check.

   DTC B1815/54, B1816/54, B1817/54 or B1818/54 is not output

   USE SIMULATION METHOD TO CHECK

   Click here

   DTC B1815/54, B1816/54, B1817/54 or B1818/54 is output

   REPLACE AIRBAG SENSOR ASSEMBLY

   Click here

5. CHECK INSTRUMENT PANEL WIRE

   1. 

      *1	Front Passenger Side Squib 2nd Step
      *2	No. 2 Instrument Panel Wire
      *3	Instrument Panel Wire
      *4	Airbag Sensor Assembly
      *5	Connector C
      *a	Front view of wire harness connector (to No. 2 Instrument Panel Wire)

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

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

   3. Turn the ignition switch to ON.

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

      Standard Voltage

      Tester Connection	Switch Condition	Specified Condition
      Gb1-3 (P2+) - Body ground	Ignition switch ON	Below 1 V
      Gb1-4 (P2-) - Body ground	Ignition switch ON	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 according to the value(s) in the table below.

      Standard Resistance

      Tester Connection	Condition	Specified Condition
      Gb1-3 (P2+) - Gb1-4 (P2-)	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
      Gb1-3 (P2+) - Gb1-4 (P2-)	Always	1 MΩ or higher

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

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

       Standard Resistance

       Tester Connection	Condition	Specified Condition
       Gb1-3 (P2+) - Body ground	Always	1 MΩ or higher
       Gb1-4 (P2-) - Body ground	Always	1 MΩ or higher

   Result

   Proceed to
   OK
   NG

   OK

   REPLACE NO. 2 INSTRUMENT PANEL WIRE

   NG

   REPLACE INSTRUMENT PANEL WIRE