DTC B166C: Front Door Pressure Sensor RH; DTC B166F: Front Door Pressure Sensor Threshold Malfunction (RH) [09/2019 - 12/2021]: Procedure

1. Turn the ignition switch off.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1	Door Side Airbag Sensor LH
   *2	No. 2 Side Airbag Sensor RH

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

   Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

3. Interchange the door side airbag sensor RH with LH and connect the connectors.
4. Connect the cable to the negative (-) battery terminal.
5. Turn the ignition switch to ON, and wait for at least 60 seconds.
6. Clear the DTCs stored in memory.

   Body Electrical > SRS Airbag > Clear DTCs 

7. Turn the ignition switch off.
8. Turn the ignition switch to ON, and wait for at least 60 seconds.
9. Check for DTCs.

   Body Electrical > SRS Airbag > Trouble Codes 

   HINT: 

   Codes other than DTCs B166C, B166F, B167A and B167E may be output at this time, but they are not related to this check.

   Result

   Result	Proceed to
   DTC B166C or B166F is output.	A
   DTC B167A or B167E is output.	B
   DTCs B166C, B166F, B167A and B167E are not output.	C

10. Turn the ignition switch off.
11. Disconnect the cable from the negative (-) battery terminal.
    WARNING:

    Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

12. Return the door side airbag sensor RH and LH to their original positions and connect the connectors.

Result: 

A 

REPLACE AIRBAG SENSOR ASSEMBLY. Refer to  REMOVAL [09/2019 - 08/2020]  , or refer to  REMOVAL [08/2020 - ] 

Result: 

B 

REPLACE DOOR SIDE AIRBAG SENSOR RH. Refer to  REMOVAL [02/2017 - 08/2020]  , or refer to  REMOVAL [08/2020 - ] 

Result: 

C 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2019 - 08/2020]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2020 - ]