Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM1000000024AU1
Model Year Start: 2023 Model: Camry Prod Date Range: [08/2022 -           ]
Title: SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: B1647,B1648; Side Satellite Sensor Bus Lost Communication (LH); 2023 - 2024 MY Camry [08/2022 -        ]

DTC

B1647

Side Satellite Sensor Bus Lost Communication (LH)

DTC

B1648

Side Satellite Sensor Bus Initialization Error (LH)

DESCRIPTION

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

The door side 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

B1647

Side Satellite Sensor Bus 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 1).
  • Door side airbag sensor LH malfunction
  • Airbag sensor assembly malfunction
  • Floor wire
  • Front door wire LH
  • Door side airbag sensor LH
  • Airbag sensor assembly

Comes on

Does not apply to test/check mode

B1648

Side Satellite Sensor Bus 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 1).
  • Door side airbag sensor LH malfunction
  • Airbag sensor assembly malfunction
  • Floor wire
  • Front door wire LH
  • Door side 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 2020 - 2024 MY Camry [03/2020 -        ]; INTRODUCTION: REPAIR INSTRUCTION: PRECAUTION

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 door side airbag sensor LH and airbag sensor assembly. 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 door side airbag sensor LH and airbag sensor assembly. 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

Door Side Airbag Sensor LH

*2

Airbag Sensor Assembly

*3

Front Door Wire LH

*4

Floor Wire

*5

Service Wire

*a

Front view of wire harness connector

(to Airbag Sensor Assembly)

*b

Front view of wire harness connector

(to Door Side Airbag 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

O12-2 (BDL+) - Body ground

Ignition switch ON

Below 1 V

O12-1 (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 32 (BBL+) and 31 (BBL-) 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

O12-2 (BDL+) - O12-1 (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

O12-2 (BDL+) - O12-1 (BDL-)

Always

1 MΩ or higher

O12-2 (BDL+) - Body ground

Always

1 MΩ or higher

O12-1 (BDL-) - Body ground

Always

1 MΩ or higher
NG

GO TO STEP 5

OK

4.

CHECK DOOR SIDE AIRBAG SENSOR LH

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

*1

Door Side Airbag Sensor RH

*2

Airbag Sensor Assembly

(b) Interchange the door side 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 B1642, B1643, B1647 and B1648 may be output at this time, but they are not related to this check.

Result

Proceed to

DTC B1647 or B1648 is output.

A

DTC B1642 or B1643 is output.

B

DTCs B1642, B1643, B1647 and B1648 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 door side airbag sensor LH and RH to their original positions and connect the connectors.

A

REPLACE AIRBAG SENSOR ASSEMBLY

B

REPLACE DOOR SIDE AIRBAG SENSOR LH

C

USE SIMULATION METHOD TO CHECK

5.

CHECK FLOOR WIRE

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

*1

Door Side Airbag Sensor LH

*2

Airbag Sensor Assembly

*3

Front Door Wire LH

*4

Floor Wire

*5

Service Wire

-

-

*a

Front view of wire harness connector

(to Airbag Sensor Assembly)

*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

OR1-23 (BDL+) - Body ground

Ignition switch ON

Below 1 V

OR1-41 (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 32 (BBL+) and 31 (BBL-) 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

OR1-23 (BDL+) - OR1-41 (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

OR1-23 (BDL+) - OR1-41 (BDL-)

Always

1 MΩ or higher

OR1-23 (BDL+) - Body ground

Always

1 MΩ or higher

OR1-41 (BDL-) - Body ground

Always

1 MΩ or higher
OK

REPLACE FRONT DOOR WIRE LH
NG

REPLACE FLOOR WIRE