Dtc B1815/54 Short In Front Passenger Side Squib 2Nd Step Circuit

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK FRONT PASSENGER AIRBAG (FRONT PASSENGER SIDE SQUIB 2ND STEP)

CHECK CONNECTOR

CHECK FRONT PASSENGER SIDE SQUIB 2ND STEP CIRCUIT

CHECK CENTER AIRBAG SENSOR

CHECK INSTRUMENT PANEL WIRE (CENTER AIRBAG SENSOR - INSTRUMENT PANEL WIRE ASSEMBLY)

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

1. After turning the ignition switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work (Click here).
   
2. When disconnecting the cable, some systems need to be initialized after the cable is reconnected (Click here).
   
3. After replacing the center airbag sensor assembly, refer to initialization (Click here).
   

HINT:

To perform the simulation method, enter the check mode (signal check) with the intelligent tester (Click here), and then wiggle each connector of the airbag system or drive the vehicle on various type of road (Click here).

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 connectors from the front 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 front passenger airbag (front passenger side squib 2nd step) for measurement, as this may lead to a serious injury due to airbag deployment.

   NOTICE:

   1. Do not forcibly insert SST into the terminals of the connector when connecting SST.
      
   2. Insert SST straight into the terminals of the connector.
      

SST

09843-18061

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).
   

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).
    

    OK:

    DTC B1815, B1816, B1817 or B1818 is not output.
    

    HINT:

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

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 from connector E.
   

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

   OK:

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

1. Disconnect the connectors from the center airbag sensor.
   

   
   
   
   

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

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

   Standard Voltage:

   Tester Connection	Switch Condition	Specified Condition
   b4-1 (P2+) - Body ground	Ignition switch ON	Below 1 V
   b4-2 (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
   b4-1 (P2+) - b4-2 (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
   b4-1 (P2+) - b4-2 (P2-)	Always	1 MΩ or higher
   b4-1 (P2+) - Body ground	Always	1 MΩ or higher
   b4-2 (P2-) - Body ground	Always	1 MΩ or higher

1. Connect the connectors to the front passenger airbag and 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 to ON, and wait for at least 60 seconds.
   

4. Clear the DTCs (Click here).
   

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).
   

   OK:

   DTC B1815, B1816, B1817 or B1818 is not output.
   

   HINT:

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

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

   
   
   
   

2. Disconnect the instrument panel wire connector from the instrument panel wire assembly.
   

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

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

   Standard Voltage:

   Tester Connection	Switch Condition	Specified Condition
   Eb1-1 - Body ground	Ignition switch ON	Below 1 V
   Eb1-2 - 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
   Eb1-1 - Eb1-2	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
   Eb1-1 - Eb1-2	Always	1 MΩ or higher
   Eb1-1 - Body ground	Always	1 MΩ or higher
   Eb1-2 - Body ground	Always	1 MΩ or higher