DTC B1860-64: Short in Driver Side Knee Airbag Squib Circuit; DTC B1861-64: Open in Driver Side Knee Airbag Squib Circuit; DTC B1862-64: Short to GND in Driver Side Knee Airbag Squib Circuit; DTC B1863-64: Short to B+ in Driver Side Knee Airbag Squib Circuit [08/2015 - 08/2017]: Procedure

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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 from the driver side knee airbag.
4. Connect the white wire side of SST (resistance: 2.1 Ω) to connector C.
   WARNING:

   Never connect the tester to the driver side knee airbag (driver side knee 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 SST.
   • 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 (Refer to DTC CHECK / CLEAR [08/2015 - 08/2017] ).
8. Turn the ignition switch off.
9. Turn the ignition switch to ON, and wait for at least 60 seconds.
10. Check for DTCs (Refer to DTC CHECK / CLEAR [08/2015 - 08/2017] ).

    OK

    DTC B1860, B1861, B1862 or B1863 is not output.

    HINT: 

    Codes other than DTC B1860, B1861, B1862 and B1863 may be output at this time, but they are not related to this check.

Result: 

OK 

REPLACE DRIVER SIDE KNEE AIRBAG ASSEMBLY 

(Refer to REMOVAL [08/2015 - 08/2019] )

Result: 

NG 

See step  2

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 C.
4. Check that the instrument panel wire connector (on the driver side knee airbag side) is not damaged.

   OK

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

Result: 

NG 

REPLACE INSTRUMENT PANEL WIRE 

Result: 

OK 

See step  3

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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
   H113-1 (DK+) - Body ground	Ignition switch ON	Below 1 V
   H113-2 (DK-) - 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
   H113-1 (DK+) - H113-2 (DK-)	Always	Below 1 Ω

7. Release the activation prevention mechanism built into connector B (Refer to DIAGNOSIS SYSTEM [08/2015 - 08/2017] ).
8. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   H113-1 (DK+) - H113-2 (DK-)	Always	1 MΩ or higher
   H113-1 (DK+) - Body ground	Always	1 MΩ or higher
   H113-2 (DK-) - Body ground	Always	1 MΩ or higher

Result: 

NG 

REPLACE INSTRUMENT PANEL WIRE 

Result: 

OK 

See step  4

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Restore the released activation prevention mechanism of connector B to the original condition.
2. Connect the connectors to the driver side knee airbag and center airbag sensor.
3. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
4. Turn the ignition switch to ON, and wait for at least 60 seconds.
5. Clear the DTCs (Refer to DTC CHECK / CLEAR [08/2015 - 08/2017] ).
6. Turn the ignition switch off.
7. Turn the ignition switch to ON, and wait for at least 60 seconds.
8. Check for DTCs (Refer to DTC CHECK / CLEAR [08/2015 - 08/2017] ).

   OK

   DTC B1860, B1861, B1862 or B1863 is not output.

   HINT: 

   Codes other than DTC B1860, B1861, B1862 and B1863 may be output at this time, but they are not related to this check.

Result: 

OK 

USE SIMULATION METHOD TO CHECK 

(Refer to DIAGNOSIS SYSTEM [08/2015 - 08/2017] )

Result: 

NG 

REPLACE CENTER AIRBAG SENSOR ASSEMBLY 

(Refer to REMOVAL [08/2015 - 08/2017] )