Toyota Venza: Lost Communication with Rear Airbag Sensor RH (B1632/81,B1633/81,B1642/81,B1692/81,B1693/81)

Toyota Venza Service Manual / Supplemental Restraint Systems / Airbag System / Lost Communication with Rear Airbag Sensor RH (B1632/81,B1633/81,B1642/81,B1692/81,B1693/81)

DESCRIPTION

The side collision sensor RH circuit (to determine deployment of the front seat side airbag assembly RH and curtain shield airbag assembly RH) is composed of the center airbag sensor assembly, rear airbag sensor RH and side airbag sensor RH.

The rear airbag sensor RH and side airbag sensor RH detect impacts to the vehicle and send signals to the center airbag sensor assembly to determine if the airbag should be deployed.

These DTCs are stored when a malfunction is detected in the circuit for the side collision sensor RH (to determine deployment of the front seat side airbag assembly RH and curtain shield airbag assembly RH).

DTC No.	DTC Detection Condition	Trouble Area
B1632/81 B1633/81 B1642/81 B1692/81 B1693/81	The center airbag sensor assembly receives a line short circuit signal, an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal in the circuit for the side collision sensor RH circuit (to determine deployment of the front seat side airbag assembly RH and curtain shield airbag assembly RH). Rear airbag sensor RH malfunction Side airbag sensor RH malfunction Center airbag sensor assembly malfunction	No. 2 floor wire Front door wire RH Rear airbag sensor RH Side airbag sensor RH Center airbag sensor assembly

DTC No.

DTC Detection Condition

Trouble Area

B1632/81

B1633/81

B1642/81

B1692/81

B1693/81

The center airbag sensor assembly receives a line short circuit signal, an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal in the circuit for the side collision sensor RH circuit (to determine deployment of the front seat side airbag assembly RH and curtain shield airbag assembly RH).
Rear airbag sensor RH malfunction
Side airbag sensor RH malfunction
Center airbag sensor assembly malfunction

No. 2 floor wire
Front door wire RH
Rear airbag sensor RH
Side airbag sensor RH
Center airbag sensor assembly

WIRING DIAGRAM

PROCEDURE

1.	CHECK CURRENT DTC

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

(b) Check the current DTCs (See page ).

Result	Proceed to
Current DTC B1633 is output.	A
Current DTC B1642 or 81 is output.	B
Current DTC B1692 or B1693 is output.	C
Current DTC B1632 is output.	D
Current DTC B1632, B1633, B1642, B1692, B1693 or 81 is not output.	E

HINT:

DTCs indicating communication errors will be changed to DTCs indicating errors in initialization by turning the ignition switch off and then to ON again.
Codes other than current DTCs B1632, B1633, B1642, B1692, B1693 and 81 may be output at this time, but they are not related to this check.

GO TO STEP 3

GO TO STEP 14

GO TO STEP 21

USE SIMULATION METHOD TO CHECK

2.	CHECK HISTORY DTC

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

(b) Check the history DTCs (See page ).

Result	Proceed to
History DTC B1632 is not output.	A
History DTC B1632 is output.	B

HINT:

Codes other than history DTC B1632 may be output at this time, but they are not related to this check.

GO TO STEP 21

3.	CHECK CONNECTORS

(a) Turn the ignition switch off.

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

(c) Check that the connectors are properly connected to the center airbag sensor assembly, rear airbag sensor RH and side airbag sensor RH. Also check that the connectors that link the No. 2 floor wire and front door wire RH are properly connected.

OK:

The connectors are properly connected.

HINT:

If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

(d) Disconnect the connectors from the center airbag sensor assembly, rear airbag sensor RH and side airbag sensor RH. Also disconnect the connectors that link the No. 2 floor wire and front door wire RH.

(e) Check that the terminals of connectors are not damaged.

OK:

The terminals are not deformed or damaged.

REPLACE WIRE HARNESS

4.	CHECK NO. 2 FLOOR WIRE (OPEN)

(a) Using SST, connect terminals 17 (BBR+) and 18 (BBR-) of connector B.

NOTICE:

Do not forcibly insert SST into the terminals of the connector when connecting.

SST: 09843-18040

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
M3-4 (BCR+) - M3-3 (BCR-)	Always	Below 1 Ω

Text in Illustration

*1	Rear Airbag Sensor RH	*2	Center Airbag Sensor Assembly
*3	No. 2 Floor Wire	*4	Front view of wire harness connector (to Center Airbag Sensor Assembly)
*5	Front view of wire harness connector (to Rear Airbag Sensor RH)	*6	Connector B
*7	Connector C	-	-

REPLACE NO. 2 FLOOR WIRE

5.	CHECK NO. 2 FLOOR WIRE (SHORT)

(a) Disconnect SST from connector B.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
M3-4 (BCR+) - M3-3 (BCR-)	Always	1 MΩ or higher

Text in Illustration

*1	Rear Airbag Sensor RH
*2	Center Airbag Sensor Assembly
*3	No. 2 Floor Wire
*4	Front view of wire harness connector (to Rear Airbag Sensor RH)
*5	Connector C

REPLACE NO. 2 FLOOR WIRE

6.	CHECK NO. 2 FLOOR WIRE (SHORT TO B+)

(a) Connect the cable to the negative (-) battery terminal.

(b) Turn the ignition switch to ON.

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
M3-4 (BCR+) - Body ground	Ignition switch ON	Below 1 V
M3-3 (BCR-) - Body ground	Ignition switch ON	Below 1 V

Text in Illustration

*1	Rear Airbag Sensor RH
*2	Center Airbag Sensor Assembly
*3	No. 2 Floor Wire
*4	Front view of wire harness connector (to Rear Airbag Sensor RH)
*5	Connector C

REPLACE NO. 2 FLOOR WIRE

7.	CHECK NO. 2 FLOOR WIRE (SHORT TO GROUND)

(a) Turn the ignition switch off.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
M3-4 (BCR+) - Body ground	Always	1 MΩ or higher
M3-3 (BCR-) - Body ground	Always	1 MΩ or higher

Text in Illustration

*1	Rear Airbag Sensor RH
*2	Center Airbag Sensor Assembly
*3	No. 2 Floor Wire
*4	Front view of wire harness connector (to Rear Airbag Sensor RH)
*5	Connector C

REPLACE NO. 2 FLOOR WIRE

8.	CHECK WIRE HARNESS (OPEN)

(a) Connect the connectors that link the No. 2 floor wire and front door wire RH.

(b) Using SST, connect terminals 2 (BDR+) and 1 (BDR-) of connector E.

NOTICE:

Do not forcibly insert SST into the terminals of the connector when connecting.

SST: 09843-18040

Standard Resistance:

Tester Connection	Condition	Specified Condition
M3-1 (BDR+) - M3-2 (BDR-)	Always	Below 1 Ω

Text in Illustration

Side Airbag Sensor RH

Rear Airbag Sensor RH

Front view of wire harness connector

(to Rear Airbag Sensor RH)

Front view of wire harness connector

(to Side Airbag Sensor RH)

Connector B

Connector E

GO TO STEP 22

9.	CHECK WIRE HARNESS (SHORT)

(a) Disconnect SST from connector E.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
M3-1 (BDR+) - M3-2 (BDR-)	Always	1 MΩ or higher

Text in Illustration

*1	Side Airbag Sensor RH
*2	Rear Airbag Sensor RH
*3	Front view of wire harness connector (to Rear Airbag Sensor RH)
*4	Connector B

GO TO STEP 23

10.	CHECK WIRE HARNESS (SHORT TO B+)

(a) Connect the cable to the negative (-) battery terminal.

(b) Turn the ignition switch to ON.

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
M3-1 (BDR+) - Body ground	Ignition switch ON	Below 1 V
M3-2 (BDR-) - Body ground	Ignition switch ON	Below 1 V

Text in Illustration

*1	Side Airbag Sensor RH
*2	Rear Airbag Sensor RH
*3	Front view of wire harness connector (to Rear Airbag Sensor RH)
*4	Connector B

GO TO STEP 24

11.	CHECK WIRE HARNESS (SHORT TO GROUND)

(a) Turn the ignition switch off.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
M3-1 (BDR+) - Body ground	Always	1 MΩ or higher
M3-2 (BDR-) - Body ground	Always	1 MΩ or higher

Text in Illustration

*1	Side Airbag Sensor RH
*2	Rear Airbag Sensor RH
*3	Front view of wire harness connector (to Rear Airbag Sensor RH)
*4	Connector B

GO TO STEP 25

12.	CHECK REAR AIRBAG SENSOR RH

(a) Turn the ignition switch off.

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

(d) Connect the cable to the negative (-) battery terminal.

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

(f) Clear the DTCs stored in memory (See page ).

(g) Turn the ignition switch off.

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

(i) Check for DTCs (See page ).

Result	Proceed to
DTC B1633, B1642, or 81 is output.	A
DTC B1638, B1647, or 82 is output.	B
DTCs B1633, B1642, or 81 and B1638, B1647, or 82 are not output.	C

Text in Illustration

*1	Rear Airbag Sensor LH
*2	Center Airbag Sensor Assembly

HINT:

Codes other than DTCs B1633, B1642 or 81 and B1638, B1647 or 82 may be output at this time, but they are not related to this check.

REPLACE REAR AIRBAG SENSOR RH

USE SIMULATION METHOD TO CHECK

13.	CHECK SIDE AIRBAG SENSOR RH

(a) Turn the ignition switch off.

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

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

(e) Connect the cable to the negative (-) battery terminal.

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

(g) Clear the DTCs stored in 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	Proceed to
DTCs B1633, B1642, or 81 and B1638, B1647, or 82 are not output.	A
DTC B1638, B1647, or 82 is output.	B
DTC B1633, B1642, or 81 is output.	C

Text in Illustration

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

HINT:

Codes other than DTC B1633, B1642 or 81 and B1638, B1647 or 82 may be output at this time, but they are not related to this check.

USE SIMULATION METHOD TO CHECK

REPLACE SIDE AIRBAG SENSOR RH

REPLACE CENTER AIRBAG SENSOR ASSEMBLY

14.	CHECK CONNECTORS

(a) Turn the ignition switch off.

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

(c) Check that the connectors are properly connected to the rear airbag sensor RH and side airbag sensor RH. Also check that the connectors that link the No. 2 floor wire and front door wire RH are properly connected.

OK:

The connectors are properly connected.

HINT:

If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

(d) Disconnect the connectors from the rear airbag sensor RH and side airbag sensor RH. Also disconnect the connectors that link the No. 2 floor wire and front door wire RH.

(e) Check that the terminals of connectors are not damaged.

OK:

The terminals are not deformed or damaged.

REPLACE WIRE HARNESS

15.	CHECK WIRE HARNESS (OPEN)

(a) Connect the connectors that link the No. 2 floor wire and front door wire RH.

(b) Using SST, connect terminals 2 (BDR+) and 1 (BDR-) of connector E.

NOTICE:

Do not forcibly insert SST into the terminals of the connector when connecting.

SST: 09843-18040

Standard Resistance:

Tester Connection	Condition	Specified Condition
M3-1 (BDR+) - M3-2 (BDR-)	Always	Below 1 Ω

Text in Illustration

Side Airbag Sensor RH

Rear Airbag Sensor RH

Front view of wire harness connector

(to Rear Airbag Sensor RH)

Front view of wire harness connector

(to Side Airbag Sensor RH)

Connector B

Connector E

GO TO STEP 22

16.	CHECK WIRE HARNESS (SHORT)

(a) Disconnect SST from connector E.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
M3-1 (BDR+) - M3-2 (BDR-)	Always	1 MΩ or higher

Text in Illustration

*1	Side Airbag Sensor RH
*2	Rear Airbag Sensor RH
*3	Front view of wire harness connector (to Rear Airbag Sensor RH)
*4	Connector B

GO TO STEP 23

17.	CHECK WIRE HARNESS (SHORT TO B+)

(a) Connect the cable to the negative (-) battery terminal.

(b) Turn the ignition switch to ON.

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
M3-1 (BDR+) - Body ground	Ignition switch ON	Below 1 V
M3-2 (BDR-) - Body ground	Ignition switch ON	Below 1 V

Text in Illustration

*1	Side Airbag Sensor RH
*2	Rear Airbag Sensor RH
*3	Front view of wire harness connector (to Rear Airbag Sensor RH)
*4	Connector B

GO TO STEP 24

18.	CHECK WIRE HARNESS (SHORT TO GROUND)

(a) Turn the ignition switch off.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
M3-1 (BDR+) - Body ground	Always	1 MΩ or higher
M3-2 (BDR-) - Body ground	Always	1 MΩ or higher

Text in Illustration

*1	Side Airbag Sensor RH
*2	Rear Airbag Sensor RH
*3	Front view of wire harness connector (to Rear Airbag Sensor RH)
*4	Connector B

GO TO STEP 25

19.	CHECK SIDE AIRBAG SENSOR RH

(a) Turn the ignition switch off.

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

(d) Connect the cable to the negative (-) battery terminal.

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

(f) Clear the DTCs stored in memory (See page ).

(g) Turn the ignition switch off.

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

(i) Check for DTCs (See page ).

Result	Proceed to
DTC B1692 or B1693 is output.	A
DTC B1697 or B1698 is output.	B
DTCs B1692 or B1693 and B1697 or B1698 are not output.	C

Text in Illustration

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

HINT:

Codes other than DTCs B1692, B1693, B1697 and B1698 may be output at this time, but they are not related to this check.

REPLACE SIDE AIRBAG SENSOR RH

USE SIMULATION METHOD TO CHECK

20.	CHECK REAR AIRBAG SENSOR RH

(a) Turn the ignition switch off.

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

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

(e) Connect the cable to the negative (-) battery terminal.

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

(g) Clear the DTCs stored in 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	Proceed to
DTCs B1692 or B1693 and B1697 or B1698 are not output.	A
DTC B1697 or B1698 is output.	B
DTC B1692 or B1693 is output.	C

Text in Illustration

*1	Rear Airbag Sensor LH
*2	Center Airbag Sensor Assembly

HINT:

Codes other than DTCs B1692, B1693, B1697 and B1698 may be output at this time, but they are not related to this check.

USE SIMULATION METHOD TO CHECK

REPLACE REAR AIRBAG SENSOR RH

REPLACE CENTER AIRBAG SENSOR ASSEMBLY

21.	CHECK REAR AIRBAG SENSOR RH

(a) Turn the ignition switch off.

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

(d) Connect the cable to the negative (-) battery terminal.

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

(f) Clear the DTCs stored in memory (See page ).

(g) Turn the ignition switch off.

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

(i) Check for DTCs (See page ).

Result	Proceed to
DTCs B1632 and B1637 are not output.	A
DTC B1637 is output.	B
DTC B1632 is output.	C

Text in Illustration

*1	Rear Airbag Sensor LH
*2	Center Airbag Sensor Assembly

HINT:

Codes other than DTCs B1632 and B1637 may be output at this time, but they are not related to this check.

USE SIMULATION METHOD TO CHECK

REPLACE REAR AIRBAG SENSOR RH

REPLACE CENTER AIRBAG SENSOR ASSEMBLY

22.	CHECK FRONT DOOR WIRE RH (OPEN)

(a) Disconnect the front door wire RH connector from the No. 2 floor wire.

HINT:

SST has already been inserted into connector E.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
HM1-1 (BDR+) - HM1-2 (BDR-)	Always	Below 1 Ω

Text in Illustration

*1	Side Airbag Sensor RH	*2	Rear Airbag Sensor RH
*3	Front Door Wire RH	*4	No. 2 Floor Wire
*5	Front view of wire harness connector (to No. 2 Floor Wire)	*6	Front view of wire harness connector (to Side Airbag Sensor RH)
*7	Connector D	*8	Connector E

REPLACE NO. 2 FLOOR WIRE

REPLACE FRONT DOOR WIRE RH

23.	CHECK FRONT DOOR WIRE RH (SHORT)

(a) Disconnect the front door wire RH connector from the No. 2 floor wire.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
HM1-1 (BDR+) - HM1-2 (BDR-)	Always	1 MΩ or higher

Text in Illustration

Side Airbag Sensor RH

Rear Airbag Sensor RH

Front Door Wire RH

No. 2 Floor Wire

Front view of wire harness connector

(to No. 2 Floor Wire)

Connector D

REPLACE NO. 2 FLOOR WIRE

REPLACE FRONT DOOR WIRE RH

24.	CHECK FRONT DOOR WIRE RH (SHORT TO B+)

(a) Turn the ignition switch off.

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

(d) Connect the cable to the negative (-) battery terminal.

(e) Turn the ignition switch to ON.

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

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
HM1-1 (BDR+) - Body ground	Ignition switch ON	Below 1 V
HM1-2 (BDR-) - Body ground	Ignition switch ON	Below 1 V

Text in Illustration

Side Airbag Sensor RH

Rear Airbag Sensor RH

Front Door Wire RH

No. 2 Floor Wire

Front view of wire harness connector

(to No. 2 Floor Wire)

Connector D

REPLACE NO. 2 FLOOR WIRE

REPLACE FRONT DOOR WIRE RH

25.	CHECK FRONT DOOR WIRE RH (SHORT TO GROUND)

(a) Disconnect the front door wire RH connector from the No. 2 floor wire.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
HM1-1 (BDR+) - Body ground	Always	1 MΩ or higher
HM1-2 (BDR-) - Body ground	Always	1 MΩ or higher

Text in Illustration

Side Airbag Sensor RH

Rear Airbag Sensor RH

Front Door Wire RH

No. 2 Floor Wire

Front view of wire harness connector

(to No. 2 Floor Wire)

Connector D

REPLACE NO. 2 FLOOR WIRE

REPLACE FRONT DOOR WIRE RH

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