Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001BKCA
Model Year Start: 2019 Model: Avalon Prod Date Range: [04/2018 -           ]
Title: SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM (for Gasoline Model): B166B,B166C,B166F; Front Door Pressure Sensor RH Circuit Range/Performance; 2019 - 2022 MY Avalon [04/2018 -        ]

DTC

B166B

Front Door Pressure Sensor RH Circuit Range/Performance

DTC

B166C

Front Door Pressure Sensor RH

DTC

B166F

Front Door Pressure Sensor Threshold Malfunction (RH)

DESCRIPTION

The side collision sensor RH circuit (bus 1) consists of the airbag ECU assembly, side airbag pressure sensor RH and side No. 2 airbag sensor RH.

The side airbag pressure sensor RH and side No. 2 airbag sensor RH detect impacts to the vehicle and send signals to the airbag ECU assembly to determine if the airbags and pretensioners should be deployed.

These DTCs are stored when a malfunction is detected in the side airbag pressure sensor RH.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Warning Indicate

Test Mode / Check Mode

B166B

Front Door Pressure Sensor RH Circuit Range/Performance

  • Side airbag pressure sensor RH malfunction
  • Airbag ECU assembly malfunction
  • Side airbag pressure sensor RH
  • Airbag ECU assembly

Comes on

Does not apply to test/check mode

B166C

Front Door Pressure Sensor RH

  • Side airbag pressure sensor RH malfunction
  • Airbag ECU assembly malfunction
  • Side airbag pressure sensor RH
  • Airbag ECU assembly

Comes on

Does not apply to test/check mode

B166F

Front Door Pressure Sensor Threshold Malfunction (RH)

  • Side airbag pressure sensor RH malfunction
  • Airbag ECU assembly malfunction
  • Side airbag pressure sensor RH
  • Airbag ECU assembly

Comes on

Does not apply to test/check mode

WIRING DIAGRAM

Click here 2019 - 2022 MY Avalon [04/2018 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM (for Gasoline Model): B166D,B166E; Lost Communication with Front Door Pressure Sensor RH+

CAUTION / NOTICE / HINT

NOTICE:

After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; INTRODUCTION: REPAIR INSTRUCTION: PRECAUTION

PROCEDURE

1.

CHECK SIDE AIRBAG PRESSURE SENSOR RH

(a) Turn the engine switch off.

*1

Side Airbag Pressure Sensor LH

*2

Side No. 2 Airbag Sensor RH

(b) Disconnect the cable from the negative (-) battery terminal.

CAUTION:

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

(c) Interchange the side airbag pressure sensor RH with LH and connect the connectors.

(d) Connect the cable to the negative (-) battery terminal.

(e) Turn the engine switch on (IG), and wait for at least 60 seconds.

(f) Clear the DTCs stored in memory.

Body Electrical > SRS Airbag > Clear DTCs

(g) Turn the engine switch off.

(h) Turn the engine switch on (IG), and wait for at least 60 seconds.

(i) Check for DTCs.

Body Electrical > SRS Airbag > Trouble Codes

HINT:

Codes other than DTCs B166B, B166C, B166F, B167A, B167E and B167F may be output at this time, but they are not related to this check.

Result

Proceed to

DTC B166B, B166C or B166F is output.

A

DTC B167A, B167E or B167F is output.

B

DTCs B166B, B166C, B166F, B167A, B167E and B167F are not output.

C

(j) Turn the engine switch off.

(k) Disconnect the cable from the negative (-) battery terminal.

CAUTION:

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

(l) Return the side airbag pressure sensor RH and LH to their original positions and connect the connectors.

A

REPLACE AIRBAG ECU ASSEMBLY 2019 - 2020 MY Avalon Avalon HV [04/2018 - 08/2020]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: REMOVAL 2021 MY Avalon Avalon HV [08/2020 - 08/2021]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: REMOVAL 2022 MY Avalon Avalon HV [08/2021 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: REMOVAL

B

REPLACE SIDE AIRBAG PRESSURE SENSOR RH 2019 - 2020 MY Avalon Avalon HV [04/2018 - 08/2020]; SUPPLEMENTAL RESTRAINT SYSTEMS: SIDE AIRBAG SENSOR (for Front Door): REMOVAL 2021 MY Avalon Avalon HV [08/2020 - 08/2021]; SUPPLEMENTAL RESTRAINT SYSTEMS: SIDE AIRBAG SENSOR (for Front Door): REMOVAL 2022 MY Avalon Avalon HV [08/2021 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: SIDE AIRBAG SENSOR (for Front Door): REMOVAL

C

USE SIMULATION METHOD TO CHECK