SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM (w/ Occupant Classification System): B166D,B166E; Lost Communication with Front Door Pressure Sensor RH; 2019 - 2020 MY RAV4 RAV4 HV [02/2019

Last Modified: 01-30-2024	6.11:8.1.0	Doc ID: RM100000001HIAD
Model Year Start: 2019	Model: RAV4	Prod Date Range: [02/2019 - 08/2020]
Title: SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM (w/ Occupant Classification System): B166D,B166E; Lost Communication with Front Door Pressure Sensor RH; 2019 - 2020 MY RAV4 RAV4 HV [02/2019 - 08/2020]

DTC

B166D

Lost Communication with Front Door Pressure Sensor RH

DTC

B166E

Front Door Pressure Sensor RH Initialization Incomplete

DESCRIPTION

The side collision sensor RH circuit consists of the airbag ECU assembly, side airbag pressure sensor RH and No. 2 side airbag sensor assembly 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
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. A No. 2 side airbag sensor assembly RH malfunction. An airbag ECU assembly malfunction.	Floor wire Front door wire RH Side airbag pressure sensor RH No. 2 side airbag sensor assembly 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. A No. 2 side airbag sensor assembly RH malfunction. An airbag ECU assembly malfunction.	Floor wire Front door wire RH Side airbag pressure sensor RH No. 2 side airbag sensor assembly 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.
Click here
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
After replacing the airbag ECU assembly, refer to initialization.
Click here

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 No. 2 side airbag sensor assembly RH 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 No. 2 side airbag sensor assembly RH and side airbag pressure sensor RH.

*1	Side Airbag Pressure Sensor RH
*2	No. 2 Side Airbag Sensor Assembly RH
*3	Front Door Wire RH
*4	Floor Wire

(b) Check that the connectors (on the No. 2 side airbag sensor assembly RH 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	No. 2 Side Airbag Sensor Assembly RH
*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 No. 2 Side Airbag Sensor Assembly RH)

(b) Turn the ignition switch to ON.

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

GO TO STEP 6

4.	CHECK SIDE AIRBAG PRESSURE SENSOR RH

(a) Connect the connector to the No. 2 side airbag sensor assembly RH.

*1	Side Airbag Pressure Sensor LH
*2	No. 2 Side Airbag Sensor Assembly RH

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

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

(e) Clear the DTCs stored in memory.

Click here

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

Body Electrical > SRS Airbag > Trouble Codes

HINT:

Codes other than DTC 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.

DTC B167B or B167C is output

REPLACE SIDE AIRBAG PRESSURE SENSOR RH

DTCs B166D, B166E, B167B and B167C are not output

USE SIMULATION METHOD TO CHECK

DTC B166D or B166E is output

5.	CHECK NO. 2 SIDE AIRBAG SENSOR ASSEMBLY RH

(a) Interchange the No. 2 side airbag sensor assembly RH with LH and connect the connectors to them.

*1	No. 2 Side Airbag Sensor Assembly LH
*2	Airbag Sensor Assembly

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

(d) Clear the DTCs stored in memory.

Click here

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.

Click here

Body Electrical > SRS Airbag > Trouble Codes

HINT:

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

(h) Turn the ignition switch off.

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

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

DTC B166D or B166E is output

REPLACE AIRBAG ECU ASSEMBLY

DTC B167B or B167C is output

REPLACE NO. 2 SIDE AIRBAG SENSOR ASSEMBLY RH

DTCs B166D, B166E, B167B and B167C are not output

USE SIMULATION METHOD TO CHECK

6.	CHECK CONNECTORS

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

*1	Side Airbag Pressure Sensor RH
*2	No. 2 Side Airbag Sensor Assembly RH
*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

7.	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	No. 2 Side Airbag Sensor Assembly RH
*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 No. 2 Side Airbag Sensor Assembly RH)

(b) Turn the ignition switch to ON.

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 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
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

REPLACE FRONT DOOR WIRE RH

REPLACE FLOOR WIRE