Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Front Door Pressure Sensor RH (B166C,B166F)

Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual / Vehicle Interior / Supplemental Restraint Systems / Airbag System / Front Door Pressure Sensor RH (B166C,B166F)

DESCRIPTION

The side collision sensor RH circuit (bus 1) consists of the airbag sensor assembly, door side airbag sensor RH and rear airbag sensor RH.

The door side airbag sensor RH and rear airbag sensor RH detect impacts to the vehicle and send signals to the airbag sensor assembly to determine if the airbags, pretensioners and selectable force limiter should be deployed.

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

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Warning Indicate

Test Mode / Check Mode

B166C

Front Door Pressure Sensor RH
  • Door side airbag sensor RH malfunction
  • Airbag sensor assembly malfunction
  • Door side airbag sensor RH
  • Airbag sensor assembly

Comes on

Does not apply to test/check mode

B166F

Front Door Pressure Sensor Threshold Malfunction (RH)
  • Door side airbag sensor RH malfunction
  • Airbag sensor assembly malfunction
  • Door side airbag sensor RH
  • Airbag sensor assembly

Comes on

Does not apply to test/check mode

WIRING DIAGRAM

Click here

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.

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PROCEDURE

1.

CHECK DOOR SIDE AIRBAG SENSOR RH

(a) Turn the engine switch off.

*1

Door Side Airbag Sensor LH

*2

Rear 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 terminal to disable the SRS system.

(c) Interchange the door side airbag 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 B166C, B166F, B167A and B167E may be output at this time, but they are not related to this check.

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

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

A

REPLACE AIRBAG SENSOR ASSEMBLY

B

REPLACE DOOR SIDE AIRBAG SENSOR RH

C

USE SIMULATION METHOD TO CHECK

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