Toyota Tundra Service Manual: Lost Communication with Side Airbag Sensor RH (B1692,B1693,B1697,B1698)

Toyota Tundra Service Manual / Vehicle Interior / Supplemental Restraint Systems / Airbag System / Lost Communication with Side Airbag Sensor RH (B1692,B1693,B1697,B1698)

DESCRIPTION

The circuit for the side collision sensor LH or RH is composed of the airbag sensor assembly, side airbag sensor assembly LH or RH and No. 2 side airbag sensor assembly LH or RH.

The No. 2 side airbag sensor assembly LH or RH detect impacts to the vehicle and send signals to the airbag sensor assembly to determine if the airbag should be deployed.

DTC B1632, B1633, B1637 or B1638 is stored when a malfunction is detected in the circuit for the side collision sensor LH or RH.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Warning Indicate

Test Mode / Check Mode

B1692

Lost Communication with Side Airbag Sensor RH

One of the following conditions is met:

  • The airbag sensor 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 sensor assembly RH malfunction.
  • An airbag sensor assembly malfunction.
  • No. 2 floor wire
  • Front door wire RH
  • Side airbag sensor assembly RH
  • Airbag sensor assembly

Comes on

Not applicable

B1693

Side Airbag Sensor RH Initialization Incomplete

One of the following conditions is met:

  • The airbag sensor 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 sensor assembly RH malfunction.
  • An airbag sensor assembly malfunction.
  • No. 2 floor wire
  • Front door wire RH
  • Side airbag sensor assembly RH
  • Airbag sensor assembly

Comes on

Not applicable

B1697

Lost Communication with Side Airbag Sensor LH

One of the following conditions is met:

  • The airbag sensor 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 LH for 2 seconds.
  • A side airbag sensor assembly LH malfunction.
  • An airbag sensor assembly malfunction.
  • floor wire
  • Front door wire LH
  • Side airbag sensor assembly LH
  • Airbag sensor assembly

Comes on

Not applicable

B1698

Side Airbag Sensor LH Initialization Incomplete

One of the following conditions is met:

  • The airbag sensor 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 LH for 2 seconds.
  • A side airbag sensor assembly LH malfunction.
  • An airbag sensor assembly malfunction.
  • floor wire
  • Front door wire LH
  • Side airbag sensor assembly LH
  • Airbag sensor assembly

Comes on

Not applicable

WIRING DIAGRAM

for RH Side: for LH Side:

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

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

    Click here

PROCEDURE

1.

CHECK DTC

(a) Turn the ignition switch off.

HINT:

If a communication error occurs, DTCs for both the LH and RH sides will be stored simultaneously. The malfunctioning area can be identified by turning the ignition switch off and then ON again.

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

(c) Check for DTCs.

Click here

Result

Proceed to

DTC B1692 or B1693 is output

A

DTC B1697 or B1698 is output

B

DTC B1692, B1693, B1697 and B1698 are not output

C

HINT:

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

B

GO TO STEP 7

C

USE SIMULATION METHOD TO CHECK

A

2.

CHECK CONNECTION OF 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 no.2 side airbag sensor assembly RH and side airbag sensor assembly RH.

OK:

The connectors are properly connected.

NG

CONNECT CONNECTOR PROPERLY

OK

3.

CHECK CONNECTORS

(a) Disconnect the connectors from the side airbag sensor assembly RH and No. 2 side airbag sensor assembly RH.

(b) Check that the connectors (on the side airbag sensor assembly RH side and no.2 side airbag sensor assembly RH side) are not damaged.

OK:

The connector is not deformed or damaged.

*1

Side Airbag Sensor Assembly RH

*2

No. 2 Side Airbag Sensor Assembly RH

*3

Front Door Wire RH

*4

No. 2 Floor Wire

NG

REPLACE FRONT DOOR WIRE RH OR NO.2 FLOOR WIRE

OK

4.

CHECK SIDE AIRBAG SENSOR ASSEMBLY RH CIRCUIT

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

*1

Side Airbag Sensor Assembly RH

*2

No. 2 Side Airbag Sensor Assembly RH

*3

Front Door Wire RH

*4

No. 2 Floor Wire

*5

Service Wire

*a

Front view of wire harness connector

(to Side Airbag Sensor Assembly RH)

*b

Front view of wire harness connector

(to No. 2 Side Airbag Sensor Assembly RH)

(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

M9-2 (BCR+) - Body ground

Ignition switch ON

Below 1 V

M9-1 (BCR-) - Body ground

Ignition switch ON

Below 1 V

(d) Turn the ignition switch off.

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

(f) Using a service wire, connect terminals 1 (BCR+) and 2 (BCR-) 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

M9-2 (BCR+) - M9-1 (BCR-)

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

M9-2 (BCR+) - M9-1 (BCR-)

Always

1 MΩ or higher

M9-2 (BCR+) - Body ground

Always

1 MΩ or higher

M9-1 (BCR-) - Body ground

Always

1 MΩ or higher

NG

GO TO STEP 6

OK

5.

CHECK SIDE AIRBAG SENSOR ASSEMBLY RH

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

*1

Side Airbag Sensor Assembly LH

*2

No. 2 Side Airbag Sensor Assembly RH

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

(c) Connect the cable to the negative (-) 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.

Click here

(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

Result

Proceed to

DTC B1692 or B1693 is output

A

DTC B1697 or B1698 is output

B

DTC B1692, B1693, B1697 and B1698 are not output

C

HINT:

Codes other than DTC B1692, B1693, B1697 and B1698 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 (-) battery terminal, and wait for at least 90 seconds.

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

A

REPLACE AIRBAG SENSOR ASSEMBLY

B

REPLACE SIDE AIRBAG SENSOR ASSEMBLY RH

C

USE SIMULATION METHOD TO CHECK

6.

CHECK NO. 2 FLOOR WIRE

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

*1

Side Airbag Sensor Assembly RH

*2

No. 2 Side Airbag Sensor Assembly RH

*3

Front Door Wire RH

*4

No. 2 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) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.

(c) Turn the ignition switch to ON.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

MQ1-2 (BCR+) - Body ground

Ignition switch ON

Below 1 V

MQ1-1 (BCR-) - Body ground

Ignition switch ON

Below 1 V

(e) Turn the ignition switch off.

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

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

NOTICE:

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

MQ1-2 (BCR+) - MQ1-1 (BCR-)

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

MQ1-2 (BCR+) - MQ1-1 (BCR-)

Always

1 MΩ or higher

MQ1-2 (BCR+) - Body ground

Always

1 MΩ or higher

MQ1-1 (BCR-) - Body ground

Always

1 MΩ or higher

OK

REPLACE FRONT DOOR WIRE RH

NG

REPLACE NO. 2 FLOOR WIRE

7.

CHECK CONNECTION OF 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 no.2 side airbag sensor assembly LH and side airbag sensor assembly LH.

OK:

The connectors are properly connected.

NG

CONNECT CONNECTOR PROPERLY

OK

8.

CHECK CONNECTORS

(a) Disconnect the connectors from the side airbag sensor assembly LH and No. 2 side airbag sensor assembly LH.

(b) Check that the connectors (on the side airbag sensor assembly LH side and no.2 side airbag sensor assembly LH side) are not damaged.

OK:

The connector is not deformed or damaged.

*1

Side Airbag Sensor Assembly LH

*2

No. 2 Side Airbag Sensor Assembly LH

*3

Front Door Wire LH

*4

Floor Wire

NG

REPLACE FRONT DOOR WIRE LH OR FLOOR WIRE

OK

9.

CHECK SIDE AIRBAG SENSOR ASSEMBLY LH CIRCUIT

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

*1

Side Airbag Sensor Assembly LH

*2

No. 2 Side Airbag Sensor Assembly LH

*3

Front Door Wire LH

*4

Floor Wire

*5

Service Wire

*a

Front view of wire harness connector

(to Side Airbag Sensor Assembly LH)

*b

Front view of wire harness connector

(to No. 2 Side Airbag Sensor Assembly LH)

(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

N11-2 (BCL+) - Body ground

Ignition switch ON

Below 1 V

N11-1 (BCL-) - Body ground

Ignition switch ON

Below 1 V

(d) Turn the ignition switch off.

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

(f) Using a service wire, connect terminals 1 (BCL+) and 2 (BCL-) 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

N11-2 (BCL+) - N11-1 (BCL-)

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

N11-2 (BCL+) - N11-1 (BCL-)

Always

1 MΩ or higher

N11-2 (BCL+) - Body ground

Always

1 MΩ or higher

N11-1 (BCL-) - Body ground

Always

1 MΩ or higher

NG

GO TO STEP 11

OK

10.

CHECK SIDE AIRBAG SENSOR ASSEMBLY LH

(a) Connect the connectors to the No. 2 side airbag sensor assembly LH.

*1

Side Airbag Sensor Assembly RH

*2

No. 2 Side Airbag Sensor Assembly LH

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

(c) Connect the cable to the negative (-) 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.

Click here

(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

Result

Proceed to

DTC B1692 or B1693 is output

A

DTC B1697 or B1698 is output

B

DTC B1692, B1693, B1697 and B1698 are not output

C

HINT:

Codes other than DTC B1692, B1693, B1697 and B1698 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 (-) battery terminal, and wait for at least 90 seconds.

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

A

REPLACE SIDE AIRBAG SENSOR ASSEMBLY LH

B

REPLACE AIRBAG SENSOR ASSEMBLY

C

USE SIMULATION METHOD TO CHECK

11.

CHECK FLOOR WIRE

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

*1

Side Airbag Sensor Assembly LH

*2

No.2 Side Airbag Sensor Assembly LH

*3

Front Door Wire LH

*4

Floor Wire

*5

Service Wire

*a

Front view of wire harness connector

(to Front Door Wire LH)

*b

Front view of wire harness connector

(to Side Airbag Sensor Assembly LH)

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

(c) Turn the ignition switch to ON.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

PN1-2 (BCL+) - Body ground

Ignition switch ON

Below 1 V

PN1-1 (BCL-) - Body ground

Ignition switch ON

Below 1 V

(e) Turn the ignition switch off.

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

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

NOTICE:

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

PN1-2 (BCL+) - PN1-1 (BCL-)

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

PN1-2 (BCL+) - PN1-1 (BCL-)

Always

1 MΩ or higher

PN1-2 (BCL+) - Body ground

Always

1 MΩ or higher

PN1-1 (BCL-) - Body ground

Always

1 MΩ or higher

OK

REPLACE FRONT DOOR WIRE LH

NG

REPLACE FLOOR WIRE

    Side Airbag Sensor RH (B1690,B1695)

    Short in D Squib Circuit (B1800-B1803)

    See More:

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