DTC B1815/54: Short in Front Passenger Side Squib 2nd Step Circuit; DTC B1816/54: Open in Front Passenger Side Squib 2nd Step Circuit; DTC B1817/54: Short to GND in Front Passenger Side Squib 2nd Step Circuit; DTC B1818/54: Short to B+ in Front Passenger Side Squib 2nd Step Circuit: Procedure

1. Turn the power switch off.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Disconnect the cable from the negative (-) auxiliary 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).
   WARNING:

   Never connect the tester to the instrument panel passenger airbag (front passenger side squib 2nd step) 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.
   • SST: 09843-18061 
5. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
6. Turn the power switch on (IG), and wait for at least 60 seconds.
7. Clear the DTCs. Refer to DTC CHECK / CLEAR [03/2012 - ] .
8. Turn the power switch off.
9. Turn the power switch on (IG), and wait for at least 60 seconds.
10. Check for DTCs. Refer to DTC CHECK / CLEAR [03/2012 - ] .

    OK

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

    HINT: 

    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.

    TEXT IN ILLUSTRATION
    
    

    *1	Front Passenger Side Squib 2nd Step
    *2	Center 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

NG → See step   2 

OK → See step   7 

1. Turn the power switch off.
2. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.
3. Disconnect SST from connector E.
4. Disconnect the connectors from the center airbag sensor assembly.
5. Check that the connectors (on the center 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.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

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

NG → REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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
   s2-2 (P2+) - Body ground	Power switch on (IG)	Below 1 V
   s2-1 (P2-) - Body ground	Power switch on (IG)	Below 1 V

4. Turn the power switch off.
5. Disconnect the cable from the negative (-) auxiliary 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
   s2-2 (P2+) - s2-1 (P2-)	Always	Below 1 Ω

7. Release the activation prevention mechanism built into connector B. Refer to DIAGNOSIS SYSTEM [03/2012 - ] .
8. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   s2-2 (P2+) - s2-1 (P2-)	Always	1 MΩ or higher
   s2-2 (P2+) - Body ground	Always	1 MΩ or higher
   s2-1 (P2-) - Body ground	Always	1 MΩ or higher

   TEXT IN ILLUSTRATION
   
   

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

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

NG → See step   5 

OK: Go to next step 

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
3. Turn the power switch on (IG), and wait for at least 60 seconds.
4. Clear the DTCs. Refer to DTC CHECK / CLEAR [03/2012 - ] .
5. Turn the power switch off.
6. Turn the power switch on (IG), and wait for at least 60 seconds.
7. Check for DTCs. Refer to DTC CHECK / CLEAR [03/2012 - ] .

   OK

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

   HINT: 

   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.

   TEXT IN ILLUSTRATION
   
   

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

NG → See step   8 

OK → See step   6 

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
3. Turn the power switch on (IG).
4. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   Ns1-3 (P2+) - Body ground	Power switch on (IG)	Below 1 V
   Ns1-4 (P2-) - Body ground	Power switch on (IG)	Below 1 V

5. Turn the power switch off.
6. Disconnect the cable from the negative (-) auxiliary 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
   Ns1-3 (P2+) - Ns1-4 (P2-)	Always	Below 1 Ω

8. Release the activation prevention mechanism built into connector B. Refer to DIAGNOSIS SYSTEM [03/2012 - ] .
9. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   Ns1-3 (P2+) - Ns1-4 (P2-)	Always	1 MΩ or higher
   Ns1-3 (P2+) - Body ground	Always	1 MΩ or higher
   Ns1-4 (P2-) - Body ground	Always	1 MΩ or higher

   TEXT IN ILLUSTRATION
   
   

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

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

NG → REPLACE INSTRUMENT PANEL WIRE 

OK → REPLACE NO. 2 INSTRUMENT PANEL WIRE