Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001CZRR
Model Year Start: 2019 Model: GR Corolla Prod Date Range: [06/2018 - 09/2022]
Title: SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM (for TMC Made Gasoline Model): B163B,B163C; Side Airbag Sensor Assembly No.2 Lost Communication (LH); 2019 - 2022 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2022]

DTC

B163B

Side Airbag Sensor Assembly No.2 Lost Communication (LH)

DTC

B163C

Side Airbag Sensor Assembly No.2 Initialization Error (LH)

DESCRIPTION

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

The side No. 1 airbag sensor LH detects impacts to the vehicle and sends 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 2).

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Warning Indicate

Test Mode / Check Mode

B163B

Side Airbag Sensor Assembly No.2 Lost Communication (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 2).
  • Side No. 1 airbag sensor LH malfunction
  • Airbag sensor assembly malfunction
  • Floor wire
  • Side No. 1 airbag sensor LH
  • Airbag sensor assembly

Comes on

Does not apply to test/check mode

B163C

Side Airbag Sensor Assembly No.2 Initialization Error (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 2).
  • Side No. 1 airbag sensor LH malfunction
  • Airbag sensor assembly malfunction
  • Floor wire
  • Side No. 1 airbag sensor LH
  • Airbag sensor assembly

Comes on

Does not apply to test/check mode

WIRING DIAGRAM

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 CONNECTION OF CONNECTORS

(a) Turn the engine 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 airbag sensor assembly and side No. 1 airbag sensor LH.

OK:

The connectors are properly connected.

NG

CONNECT CONNECTORS PROPERLY

OK

2.

CHECK CONNECTORS

(a) Disconnect the connectors from the airbag sensor assembly and side No. 1 airbag sensor 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

OK

3.

CHECK FLOOR WIRE

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

*1

Side No. 1 Airbag Sensor LH

*2

Airbag Sensor Assembly

*3

Floor Wire

*4

Service Wire

*a

Front view of wire harness connector

(to Airbag Sensor Assembly)

*b

Front view of wire harness connector

(to Side No. 1 Airbag Sensor LH)

(b) Turn the engine switch on (IG).

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

O15-2 (BFL+) - Body ground

Engine switch on (IG)

Below 1 V

O15-1 (BFL-) - Body ground

Engine switch on (IG)

Below 1 V

(d) Turn the engine switch off.

(e) 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.

(f) Using a service wire, connect terminals 29 (BCL+) and 30 (BCL-) of connector B.

NOTICE:

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

O15-2 (BFL+) - O15-1 (BFL-)

Always

Below 1 Ω

(h) Disconnect the service wire from connector B.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

O15-2 (BFL+) - O15-1 (BFL-)

Always

1 MΩ or higher

O15-2 (BFL+) - Body ground

Always

1 MΩ or higher

O15-1 (BFL-) - Body ground

Always

1 MΩ or higher

NG

REPLACE FLOOR WIRE

OK

4.

CHECK SIDE NO. 1 AIRBAG SENSOR LH

(a) Connect the connector to the airbag sensor assembly.

*1

Side No. 1 Airbag Sensor RH

*2

Airbag Sensor Assembly

(b) Interchange the side No. 1 airbag sensor LH with RH and connect the connectors.

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

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

(e) Clear the DTCs stored in memory.

Body Electrical > SRS Airbag > Clear DTCs

(f) Turn the engine switch off.

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

(h) Check for DTCs.

Body Electrical > SRS Airbag > Trouble Codes

HINT:

Codes other than DTCs B162B, B162C, B163B and B163C may be output at this time, but they are not related to this check.

Result

Proceed to

DTC B163B or B163C is output.

A

DTC B162B or B162C is output.

B

DTCs B162B, B162C, B163B and B163C are not output.

C

(i) Turn the engine 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. 1 airbag sensor LH and RH to their original positions and connect the connectors.

A

REPLACE AIRBAG SENSOR ASSEMBLY 2019 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 01/2019]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: REMOVAL 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: REMOVAL 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: REMOVAL

B

REPLACE SIDE NO. 1 AIRBAG SENSOR LH 2019 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 01/2019]; SUPPLEMENTAL RESTRAINT SYSTEMS: SIDE AIRBAG SENSOR (for Center Pillar): REMOVAL 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; SUPPLEMENTAL RESTRAINT SYSTEMS: SIDE AIRBAG SENSOR (for Center Pillar): REMOVAL 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; SUPPLEMENTAL RESTRAINT SYSTEMS: SIDE AIRBAG SENSOR (for Center Pillar): REMOVAL

C

USE SIMULATION METHOD TO CHECK