Toyota Avalon Service & Repair Manual: Front Door Pressure Sensor LH (B167A,B167E,B167F)

DESCRIPTION

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

The side airbag pressure sensor LH and side No. 2 airbag sensor LH 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 LH.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Warning Indicate

Test Mode / Check Mode

B167A

Front Door Pressure Sensor LH

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

Comes on

Does not apply to test/check mode

B167E

Front Door Pressure Sensor Threshold Malfunction (LH)

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

Comes on

Does not apply to test/check mode

B167F

Front Door Pressure Sensor LH Circuit Range/Performance

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

Comes on

Does not apply to test/check mode

WIRING DIAGRAM

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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 SIDE AIRBAG PRESSURE SENSOR LH

(a) Turn the engine switch off.

*1

Side Airbag Pressure Sensor RH

*2

Side No. 2 Airbag Sensor LH

(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 LH with RH 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 B167A, B167E or B167F is output.

A

DTC B166B, B166C or B166F 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 LH and RH to their original positions and connect the connectors.

A

REPLACE AIRBAG ECU ASSEMBLY

B

REPLACE SIDE AIRBAG PRESSURE SENSOR LH

C

USE SIMULATION METHOD TO CHECK

    Lost Communication with Front Door Pressure Sensor RH (B166D,B166E)

    Lost Communication with Front Door Pressure Sensor LH (B167B,B167C)

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