Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001HSJP
Model Year Start: 2020 Model: GR Corolla Prod Date Range: [03/2019 - 09/2022]
Title: SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM (for TMMMS Made): B167B,B167C; Lost Communication with Front Door Pressure Sensor LH; 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]

DTC

B167B

Lost Communication with Front Door Pressure Sensor LH

DTC

B167C

Front Door Pressure Sensor LH Initialization Incomplete

DESCRIPTION

The side collision sensor LH circuit (bus 1) consists of the airbag sensor 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 sensor assembly to determine if the airbags and pretensioners should be deployed.

These DTCs are stored when a malfunction is detected in the side collision sensor LH circuit (bus 1).

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Warning Indicate

Test Mode / Check Mode

B167B

Lost Communication with Front Door Pressure Sensor LH
  • The airbag sensor assembly detects a line short, short to ground or B+, or an open in the side collision sensor LH circuit (bus 1).
  • Side No. 2 airbag sensor LH malfunction
  • Side airbag pressure sensor LH malfunction
  • Airbag sensor assembly malfunction
  • Floor wire
  • Front door wire LH
  • Side No. 2 airbag sensor LH
  • Side airbag pressure sensor LH
  • Airbag sensor assembly

Comes on

Does not apply to test/check mode

B167C

Front Door Pressure Sensor LH Initialization Incomplete
  • The airbag sensor assembly detects a line short, short to ground or B+, or an open in the side collision sensor LH circuit (bus 1).
  • Side No. 2 airbag sensor LH malfunction
  • Side airbag pressure sensor LH malfunction
  • Airbag sensor assembly malfunction
  • Floor wire
  • Front door wire LH
  • Side No. 2 airbag sensor LH
  • Side airbag pressure sensor LH
  • Airbag sensor assembly

Comes on

Does not apply to test/check mode

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

After turning the ignition 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 CONNECTION OF CONNECTORS

(a) Turn the ignition switch off.

(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) Check that the connectors are properly connected to the side airbag pressure sensor LH and side No. 2 airbag sensor LH. Also check that the connectors that link the floor wire and front door wire LH are properly connected.

OK:

The connectors are properly connected.

NG

CONNECT CONNECTORS PROPERLY
OK

2.

CHECK CONNECTORS

(a) Disconnect the connectors from the side airbag pressure sensor LH and side No. 2 airbag sensor LH. Also disconnect the connectors that link the floor wire and front door wire LH.

(b) Check that the terminals of the connectors are not deformed or damaged.

OK:

The terminals are not deformed or damaged.

NG

REPLACE FLOOR WIRE OR FRONT DOOR WIRE LH
OK

3.

CHECK WIRE HARNESS

(a) Connect the connectors that link the floor wire and front door wire LH.

*1

Side Airbag Pressure Sensor LH

*2

Side No. 2 Airbag Sensor LH

*3

Front Door Wire LH

*4

Floor Wire

*5

Service Wire

*a

Front view of wire harness connector

(to Side No. 2 Airbag Sensor LH)

*b

Front view of wire harness connector

(to Side Airbag Pressure Sensor LH)

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

(c) Turn the ignition switch to ON.

(d) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

O11-1 (BDL+) - Body ground

Ignition switch ON

Below 1 V

O11-2 (BDL-) - Body ground

Ignition switch ON

Below 1 V

(e) Turn the ignition switch off.

(f) 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.

(g) Using a service wire, connect terminals 2 (BDL+) and 1 (BDL-) of connector E.

NOTICE:

Do not forcibly insert the service wire into the terminals of the connector when connecting the wire.

(h) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

O11-1 (BDL+) - O11-2 (BDL-)

Always

Below 1 Ω

(i) Disconnect the service wire from connector E.

(j) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

O11-1 (BDL+) - O11-2 (BDL-)

Always

1 MΩ or higher

O11-1 (BDL+) - Body ground

Always

1 MΩ or higher

O11-2 (BDL-) - Body ground

Always

1 MΩ or higher
NG

GO TO STEP 6

OK

4.

CHECK SIDE NO. 2 AIRBAG SENSOR LH

(a) Connect the connector to the side airbag pressure sensor LH.

*1

Side No. 2 Airbag Sensor RH

*2

Airbag Sensor Assembly

(b) Interchange the side No. 2 airbag sensor LH with RH and connect the connectors.

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

(d) Turn the ignition switch to ON, and wait for at least 60 seconds.

(e) Clear the DTCs stored in memory.

Body Electrical > SRS Airbag > Clear DTCs

(f) Turn the ignition switch off.

(g) Turn the ignition switch to ON, and wait for at least 60 seconds.

(h) Check for DTCs.

Body Electrical > SRS Airbag > Trouble Codes

HINT:

Codes other than DTCs B166D, B166E, B167B and B167C may be output at this time, but they are not related to this check.

Result

Proceed to

DTC B167B or B167C is output.

A

DTC B166D or B166E is output.

B

DTCs B166D, B166E, B167B and B167C are not output.

C

(i) Turn the ignition switch off.

(j) 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.

(k) Return the side No. 2 airbag sensor LH and RH to their original positions and connect the connectors.

B

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C

USE SIMULATION METHOD TO CHECK

A

5.

CHECK SIDE AIRBAG PRESSURE SENSOR LH

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

*1

Side Airbag Pressure Sensor RH

*2

Side No. 2 Airbag Sensor LH

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

(c) Turn the ignition switch to ON, and wait for at least 60 seconds.

(d) Clear the DTCs stored in memory.

Body Electrical > SRS Airbag > Clear DTCs

(e) Turn the ignition switch off.

(f) Turn the ignition switch to ON, and wait for at least 60 seconds.

(g) Check for DTCs.

Body Electrical > SRS Airbag > Trouble Codes

HINT:

Codes other than DTCs B166D, B166E, B167B and B167C may be output at this time, but they are not related to this check.

Result

Proceed to

DTC B167B or B167C is output.

A

DTC B166D or B166E is output.

B

DTCs B166D, B166E, B167B and B167C are not output.

C

(h) Turn the ignition switch off.

(i) 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.

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

A

REPLACE AIRBAG SENSOR ASSEMBLY

B

REPLACE SIDE AIRBAG PRESSURE SENSOR LH

C

USE SIMULATION METHOD TO CHECK

6.

CHECK FLOOR WIRE

(a) Disconnect the floor wire connector from the front door wire LH.

*1

Side Airbag Pressure Sensor LH

*2

Side No. 2 Airbag Sensor LH

*3

Front Door Wire LH

*4

Floor Wire

*5

Service Wire

*a

Front view of wire harness connector

(to Side No. 2 Airbag Sensor LH)

*b

Front view of wire harness connector

(to Front Door Wire LH)

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

(c) Turn the ignition switch to ON.

(d) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

LO1-22 (BDL+) - Body ground

Ignition switch ON

Below 1 V

LO1-40 (BDL-) - Body ground

Ignition switch ON

Below 1 V

(e) Turn the ignition switch off.

(f) 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.

(g) Using a service wire, connect terminals 1 (BDL+) and 2 (BDL-) of connector B.

NOTICE:

Do not forcibly insert the service wire into the terminals of the connector when connecting the wire.

(h) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

LO1-22 (BDL+) - LO1-40 (BDL-)

Always

Below 1 Ω

(i) Disconnect the service wire from connector B.

(j) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

LO1-22 (BDL+) - LO1-40 (BDL-)

Always

1 MΩ or higher

LO1-22 (BDL+) - Body ground

Always

1 MΩ or higher

LO1-40 (BDL-) - Body ground

Always

1 MΩ or higher
OK

REPLACE FRONT DOOR WIRE LH
NG

REPLACE FLOOR WIRE