SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: B163B,B163C,B1699; Side Airbag Sensor Assembly No.2 Lost Communication (LH); 2018 - 2024 MY Camry [03/2017

Last Modified: 11-20-2023	6.11:8.1.0	Doc ID: RM1000000012UQN
Model Year Start: 2018	Model: Camry	Prod Date Range: [03/2017 - ]
Title: SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: B163B,B163C,B1699; Side Airbag Sensor Assembly No.2 Lost Communication (LH); 2018 - 2024 MY Camry [03/2017 - ]

DTC

B163B

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

DTC

B163C

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

DTC

B1699

No.2 Side Satellite Sensor Bus LH Initialization Incomplete

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
B1699	No.2 Side Satellite Sensor Bus 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 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 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.

Click here

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.

OK:

The connectors are properly connected.

CONNECT CONNECTORS PROPERLY

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.

REPLACE FLOOR WIRE

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 ignition switch to ON.

Standard Voltage:

Tester Connection	Condition	Specified Condition
R36-2 (BFL+) - Body ground	Ignition switch ON	Below 1 V
R36-1 (BFL-) - Body ground	Ignition switch ON	Below 1 V

(d) Turn the ignition 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
R36-2 (BFL+) - R36-1 (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
R36-2 (BFL+) - R36-1 (BFL-)	Always	1 MΩ or higher
R36-2 (BFL+) - Body ground	Always	1 MΩ or higher
R36-1 (BFL-) - Body ground	Always	1 MΩ or higher

REPLACE FLOOR WIRE

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.

(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 B162B, B162C, B163B, B163C, B1694 and B1699 may be output at this time, but they are not related to this check.

Result	Proceed to
DTC B163B, B163C or B1699 is output.	A
DTC B162B, B162C or B1694 is output.	B
DTCs B162B, B162C, B163B, B163C, B1694 and B1699 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. 1 airbag sensor LH and RH to their original positions and connect the connectors.

REPLACE AIRBAG SENSOR ASSEMBLY

REPLACE SIDE NO. 1 AIRBAG SENSOR LH

USE SIMULATION METHOD TO CHECK