DTC B166C: Front Door Pressure Sensor RH; DTC B166F: Front Door Pressure Sensor Threshold Malfunction (RH) [10/2020 - 11/2021]: Procedure

1. Turn the power switch off.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1	Door Side Airbag Sensor LH
   *2	Side Airbag Sensor Assembly RH

2. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 60 seconds.
3. Interchange the door side airbag sensor RH with LH and connect the connectors.
4. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
5. Turn the power switch on (IG), and wait for at least 60 seconds.
6. Clear the DTCs stored in memory.

   Refer to DTC CHECK / CLEAR [10/2020 - 10/2023]

   Body Electrical > SRS Airbag > Clear DTCs 

7. Turn the power switch off.
8. Turn the power switch on (IG), and wait for at least 60 seconds.
9. Check for DTCs.

   Refer to DTC CHECK / CLEAR [10/2020 - 10/2023]

   Body Electrical > SRS Airbag > Trouble Codes 

   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

   HINT: 

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

10. Turn the power switch off.
11. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 60 seconds.
12. Return the door side airbag sensor LH and RH to their original positions and connect the connectors.

Result: 

A 

REPLACE AIRBAG ECU ASSEMBLY. Refer to  REMOVAL [10/2020 - 11/2021] 

Result: 

B 

REPLACE DOOR SIDE AIRBAG SENSOR RH. Refer to  REMOVAL [10/2020 - 11/2021] 

Result: 

C 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2020 - 11/2021]