Toyota Tacoma (2015-2018) Service Manual: Rear Airbag Sensor RH Circuit Malfunction (B1630/23)

DESCRIPTION

The airbag sensor RH consists of parts such as the safing sensor, the diagnostic circuit and the lateral deceleration sensor.

When the airbag sensor assembly receives signals from the lateral deceleration sensor, it determines whether or not the SRS should be activated.

DTC B1630/23 is set when a malfunction is detected in the rear airbag sensor RH and side airbag sensor assembly RH circuit.

DTC No.	DTC Detections Conditions	Trouble Areas
B1630/23	The airbag sensor assembly receives an open circuit signal in the rear airbag sensor RH and side airbag sensor assembly RH circuit for 2 seconds Rear airbag sensor RH malfunction Side airbag sensor assembly RH malfunction Airbag sensor assembly malfunction	Rear airbag sensor RH Side airbag sensor assembly RH Airbag sensor assembly Floor wire

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 (See page ).

PROCEDURE

1.	CHECK CONNECTION OF CONNECTORS

(a) Turn the ignition switch off.

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

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

OK:

The connectors are properly connected.

NG

CONNECT CONNECTORS

OK

2.	CHECK CONNECTORS

(a) Check that the connectors (on the side airbag sensor assembly RH side and airbag sensor rear RH side) are not damaged (See page ).

OK:

The connectors are not deformed or damaged.

NG

REPLACE WIRE HARNESS

OK

3.	CHECK FLOOR WIRE (FOR OPEN)

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

(b) Using service wire, connect S14-2 (BCR+) and S14-1 (BCR-) of connector C.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
S12-1 (BCR+) - S12-2 (BCR-)	Always	Below 1 Ω

Text in Illustration

*1	Rear Airbag Sensor RH
*2	Side Airbag Sensor Assembly RH
*3	Service Wire

NG

REPLACE FLOOR WIRE

OK

4.	CHECK FLOOR WIRE (FOR SHORT)

(a) Disconnect the service wire from connector C.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
S12-1 (BCR+) - S12-2 (BCR-)	Always	1 MΩ or Higher

Text in Illustration

*1	Rear Airbag Sensor RH
*2	Side Airbag Sensor Assembly RH

NG

REPLACE FLOOR WIRE

OK

5.	CHECK FLOOR WIRE (TO B+)

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

(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
S12-1 (BCR+) - Body ground	Ignition switch ON	Below 1 V
S12-2 (BCR-) - Body ground	Ignition switch ON	Below 1 V

Text in Illustration

*1	Rear Airbag Sensor RH
*2	Side Airbag Sensor Assembly RH

NG

REPLACE FLOOR WIRE

OK

6.	CHECK FLOOR WIRE (TO GROUND)

(a) Turn the ignition switch off.

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

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
S12-1 (BCR+) - Body ground	Always	1 MΩ or Higher
S12-2 (BCR-) - Body ground	Always	1 MΩ or Higher

Text in Illustration

*1	Rear Airbag Sensor RH
*2	Side Airbag Sensor Assembly RH

NG

REPLACE FLOOR WIRE

OK

7.	CHECK REAR AIRBAG SENSOR RH

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

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

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

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

(e) Clear any DTCs stored in the memory (See page ).

(f) Turn the ignition switch off.

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

(h) Check for DTCs (See page ).

Result

Result	Proceed to
DTC B1630/23 is output.	A
DTC B1635/24 is output.	B
Neither DTC B1630/23 nor B1635/24 is output.	C

B

REPLACE REAR AIRBAG SENSOR RH

C

USE SIMULATION METHOD TO CHECK

A

8.	CHECK SIDE AIRBAG SENSOR ASSEMBLY RH

(a) Turn the ignition switch off.

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

(c) Return the rear airbag sensor LH and RH to their original positions and connect the connectors to them.

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

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

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

(g) Clear any DTCs stored in the memory (See page ).

(h) Turn the ignition switch off.

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

(j) Check for DTCs (See page ).

Result

Result	Proceed to
DTC B1630/23 is output.	A
DTC B1635/24 is output.	B
Neither DTC B1630/23 nor B1635/24 is output.	C

B

REPLACE REAR AIRBAG SENSOR RH

C

USE SIMULATION METHOD TO CHECK

A

9.	REPLACE AIRBAG SENSOR ASSEMBLY

(a) Turn the ignition switch off.

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

(c) Replace the airbag sensor assembly (See page ).

HINT:

Perform the inspection using parts from a normal vehicle when possible.

(d) Connect the connectors to the airbag sensor assembly.

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

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

(g) Clear any DTCs stored in the memory (See page ).

(h) Turn the ignition switch off.

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

(j) Check for DTCs (See page ).

OK:

DTC B1630/23 is not output.

HINT:

DTCs other than B1630/23 may be output at this time, but they are not related to this check.

Result

Result	Proceed to
NG	A
OK	B

B

END

A

10.	REPLACE REAR AIRBAG SENSOR RH

(a) Turn the ignition switch off.

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

(c) Replace the rear airbag sensor RH for Double Cab (See page ) or for Access Cab (See page ).

(d) Connect the connectors to the airbag sensor assembly.

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

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

(g) Clear any DTCs stored in the memory (See page ).

(h) Turn the ignition switch off.

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

(j) Check for DTCs (See page ).

OK:

DTC B1630/23 is not output.

HINT:

DTCs other than B1630/23 may be output at this time, but they are not related to this check.

OK

END

NG

REPLACE SIDE AIRBAG SENSOR ASSEMBLY RH