Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001QM5H
Model Year Start: 2021 Model: RAV4 Prod Date Range: [08/2020 -           ]
Title: SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: B166D,B1642,B1643,B166E; Lost Communication with Front Door Pressure Sensor RH; 2021 - 2024 MY RAV4 RAV4 HV [08/2020 -        ]

DTC

B166D

Lost Communication with Front Door Pressure Sensor RH

DTC

B1642

Side Satellite Sensor Bus Lost Communication (RH)

DTC

B1643

Side Satellite Sensor Bus Initialization Error (RH)

DTC

B166E

Front Door Pressure Sensor RH Initialization Incomplete

DESCRIPTION

The side collision sensor RH circuit consists of the airbag ECU assembly and side airbag pressure sensor RH.

The side airbag pressure sensor RH detects impacts to the vehicle and send signals to the airbag ECU assembly to determine if the SRS should be deployed.

These DTCs are stored when a malfunction is detected in the circuit for the side collision sensor RH circuit.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Warning Indicate

Test Mode / Check Mode

B1642

Side Satellite Sensor Bus Lost Communication (RH)

One of the following conditions is met:

  • The airbag ECU assembly detects a line short circuit signal, open circuit signal, short circuit to ground signal or short circuit to B+ signal in the circuit for the side collision sensor RH for 2 seconds.
  • A side airbag pressure sensor RH malfunction.
  • An airbag ECU assembly malfunction.
  • Floor wire
  • Front door wire RH
  • Side airbag pressure sensor RH
  • Airbag ECU assembly

Comes on

Not applicable

B1643

Side Satellite Sensor Bus Initialization Error (RH)

One of the following conditions is met:

  • The airbag ECU assembly detects a line short circuit signal, open circuit signal, short circuit to ground signal or short circuit to B+ signal in the circuit for the side collision sensor RH for 2 seconds.
  • A side airbag pressure sensor RH malfunction.
  • An airbag ECU assembly malfunction.
  • Floor wire
  • Front door wire RH
  • Side airbag pressure sensor RH
  • Airbag ECU assembly

Comes on

Not applicable

B166D

Lost Communication with Front Door Pressure Sensor RH

One of the following conditions is met:

  • The airbag ECU assembly detects a line short circuit signal, open circuit signal, short circuit to ground signal or short circuit to B+ signal in the circuit for the side collision sensor RH for 2 seconds.
  • A side airbag pressure sensor RH malfunction.
  • An airbag ECU assembly malfunction.
  • Floor wire
  • Front door wire RH
  • Side airbag pressure sensor RH
  • Airbag ECU assembly

Comes on

Not applicable

B166E

Front Door Pressure Sensor RH Initialization Incomplete

One of the following conditions is met:

  • The airbag ECU assembly detects a line short circuit signal, open circuit signal, short circuit to ground signal or short circuit to B+ signal in the circuit for the side collision sensor RH for 2 seconds.
  • A side airbag pressure sensor RH malfunction.
  • An airbag ECU assembly malfunction.
  • Floor wire
  • Front door wire RH
  • Side airbag pressure sensor RH
  • Airbag ECU assembly

Comes on

Not applicable

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal.

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  • When disconnecting the cable from the negative (-) auxiliary battery terminal while performing repairs, some systems need to be initialized after the cable is reconnected.

    Click here 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; INTRODUCTION: REPAIR INSTRUCTION: INITIALIZATION 2022 MY RAV4 RAV4 HV [12/2021 - 10/2022]; INTRODUCTION: REPAIR INSTRUCTION: INITIALIZATION 2023 MY RAV4 RAV4 HV [10/2022 - 10/2023]; INTRODUCTION: REPAIR INSTRUCTION: INITIALIZATION 2024 MY RAV4 RAV4 HV [10/2023 -        ]; INTRODUCTION: REPAIR INSTRUCTION: INITIALIZATION

  • After replacing the airbag ECU assembly, refer to initialization.

    Click here 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; INTRODUCTION: REPAIR INSTRUCTION: INITIALIZATION 2022 MY RAV4 RAV4 HV [12/2021 - 10/2022]; INTRODUCTION: REPAIR INSTRUCTION: INITIALIZATION 2023 MY RAV4 RAV4 HV [10/2022 - 10/2023]; INTRODUCTION: REPAIR INSTRUCTION: INITIALIZATION 2024 MY RAV4 RAV4 HV [10/2023 -        ]; INTRODUCTION: REPAIR INSTRUCTION: INITIALIZATION

PROCEDURE

1.

CHECK CONNECTION OF CONNECTORS

(a) Turn the ignition switch off.

(b) Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.

(c) Check that the connectors are properly connected to the airbag ECU assembly and side airbag pressure sensor RH.

The connectors are not properly connected

CONNECT CONNECTORS PROPERLY
The connectors are properly connected

2.

CHECK CONNECTORS

(a) Disconnect the connectors from the airbag ECU assembly and side airbag pressure sensor RH.

*1

Side Airbag Pressure Sensor RH

*2

Airbag ECU Assembly

*3

Front Door Wire RH

*4

Floor Wire

(b) Check that the connectors (on the airbag ECU assembly side and side airbag pressure sensor RH side) are not damaged.

The connectors are deformed or damaged

REPLACE FRONT DOOR WIRE RH OR FLOOR WIRE
The connectors are not deformed or damaged

3.

CHECK SIDE AIRBAG PRESSURE SENSOR RH CIRCUIT

(a) Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.

*1

Side Airbag Pressure Sensor RH

*2

Airbag ECU Assembly

*3

Front Door Wire RH

*4

Floor Wire

*5

Service Wire

*a

Front view of wire harness connector

(to Side Airbag Pressure Sensor RH)

*b

Front view of wire harness connector

(to Airbag ECU Assembly)

(b) Turn the ignition switch to ON.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

I10-2 (BDR+) - Body ground

Ignition switch ON

Below 1 V

I10-1 (BDR-) - Body ground

Ignition switch ON

Below 1 V

(d) Turn the ignition switch off.

(e) Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.

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

NOTICE:

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I10-2 (BDR+) - I10-1 (BDR-)

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

I10-2 (BDR+) - I10-1 (BDR-)

Always

1 MΩ or higher

I10-2 (BDR+) - Body ground

Always

1 MΩ or higher

I10-1 (BDR-) - Body ground

Always

1 MΩ or higher
NG

GO TO STEP 5

OK

4.

CHECK SIDE AIRBAG PRESSURE SENSOR RH

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

*1

Side Airbag Pressure Sensor LH

*2

Airbag ECU Assembly

(b) Interchange the side airbag pressure sensor RH with LH and connect the connectors to them.

(c) Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.

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

(e) Clear the DTCs stored in memory.

Click here 2021 - 2024 MY RAV4 RAV4 HV [08/2020 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: DTC CHECK / CLEAR

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.

Click here 2021 - 2024 MY RAV4 RAV4 HV [08/2020 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: DTC CHECK / CLEAR

Body Electrical > SRS Airbag > Trouble Codes

Result

Proceed to

DTC B1642, B1643, B166D or B166E is output

A

DTC B1647, B1648, B167B or B167C is output

B

DTCs B1642, B1643, B1647, B1648, B166D, B166E, B167B and B167C are not output

C

HINT:

Codes other than DTC B1642, B1643, B1647, B1648, B166D, B166E, B167B and B167C may be output at this time, but they are not related to this check.

(i) Turn the ignition switch off.

(j) Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.

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

A

REPLACE AIRBAG ECU ASSEMBLY 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: REMOVAL 2022 MY RAV4 RAV4 HV [12/2021 - 10/2022]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: REMOVAL 2023 MY RAV4 RAV4 HV [10/2022 - 10/2023]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: REMOVAL 2024 MY RAV4 RAV4 HV [10/2023 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: REMOVAL

B

REPLACE SIDE AIRBAG PRESSURE SENSOR RH 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; SUPPLEMENTAL RESTRAINT SYSTEMS: SIDE AIRBAG SENSOR (for Front Door): REMOVAL 2022 MY RAV4 RAV4 HV [12/2021 - 10/2022]; SUPPLEMENTAL RESTRAINT SYSTEMS: SIDE AIRBAG SENSOR (for Front Door): REMOVAL 2023 MY RAV4 RAV4 HV [10/2022 - 10/2023]; SUPPLEMENTAL RESTRAINT SYSTEMS: SIDE AIRBAG SENSOR (for Front Door): REMOVAL 2024 MY RAV4 RAV4 HV [10/2023 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: SIDE AIRBAG SENSOR (for Front Door): REMOVAL

C

USE SIMULATION METHOD TO CHECK

5.

CHECK CONNECTORS

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

*1

Side Airbag Pressure Sensor RH

*2

Airbag ECU Assembly

*3

Front Door Wire RH

*4

Floor Wire

(b) Check that the connectors (on the floor wire side and front door wire RH side) are not damaged.

The connector is deformed or damaged

REPLACE FLOOR WIRE OR FRONT DOOR WIRE RH
The connector is not deformed or damaged

6.

CHECK FLOOR WIRE

(a) Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.

*1

Side Airbag Pressure Sensor RH

*2

Airbag ECU Assembly

*3

Front Door Wire RH

*4

Floor Wire

*5

Service Wire

*a

Front view of wire harness connector

(to Front Door Wire RH)

*b

Front view of wire harness connector

(to Airbag ECU Assembly)

(b) Turn the ignition switch to ON.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

IM2-1 (BDR+) - Body ground

Ignition switch ON

Below 1 V

IM2-2 (BDR-) - Body ground

Ignition switch ON

Below 1 V

(d) Turn the ignition switch off.

(e) Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.

(f) Using a service wire, connect terminals 25 (BBR+) and 26 (BBR-) of connector B.

NOTICE:

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

IM2-1 (BDR+) - IM2-2 (BDR-)

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

IM2-1 (BDR+) - IM2-2 (BDR-)

Always

1 MΩ or higher

IM2-1 (BDR+) - Body ground

Always

1 MΩ or higher

IM2-2 (BDR-) - Body ground

Always

1 MΩ or higher
OK

REPLACE FRONT DOOR WIRE RH
NG

REPLACE FLOOR WIRE