B1642

SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1642/81, B1647/82:

B1642/81 - Lost Communication with Side Satellite Sensor Bus RH

DESCRIPTION

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

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

DTC B1642/81 or B1647/82 is recorded when a malfunction is detected in the circuit for the side collision sensor LH or RH (to determine deployment of the front seat side airbag LH or RH and curtain shield airbag LH or RH).

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK FOR DTC

(a) Turn the ignition switch to OFF.

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

(c) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

Result:

A -- USE SIMULATION METHOD TO CHECK Diagnosis System

B -- CHECK CONNECTION OF CONNECTORS
C -- Continue to next step.

2. CHECK CONNECTION OF CONNECTORS

(a) Turn the ignition switch to 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 center airbag sensor and side airbag sensor RH.

OK:

The connectors are properly connected.

NG -- CONNECT CONNECTORS PROPERLY
OK -- Continue to next step.

3. CHECK CONNECTORS

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

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

OK:

The connectors are not deformed or damaged.

NG -- REPLACE NO. 2 FLOOR WIRE
OK -- Continue to next step.

4. CHECK NO. 2 FLOOR WIRE (CENTER AIRBAG SENSOR - SIDE AIRBAG SENSOR RH)

(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:

(d) Turn the ignition switch to OFF.

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

(f) Using a service wire, connect terminals 8 (BBR+) and 11 (BBR-) of connector B.

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

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

Standard resistance:

(h) Disconnect the service wire from connector B.

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

Standard resistance:

NG -- REPLACE NO. 2 FLOOR WIRE
OK -- Continue to next step.

5. CHECK CONNECTION OF CONNECTORS

(a) Check that the connector is properly connected to the rear airbag sensor RH.

OK:

The connector is properly connected.

NG -- CONNECT CONNECTOR PROPERLY
OK -- Continue to next step.

6. CHECK CONNECTORS

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

(b) Check that the connector (on the rear airbag sensor RH side) is not damaged.

OK:

The connector is not deformed or damaged.

NG -- REPLACE NO. 2 FLOOR WIRE
OK -- Continue to next step.

7. CHECK NO. 2 FLOOR WIRE (SIDE AIRBAG SENSOR RH - REAR AIRBAG SENSOR RH)

(d) Turn the ignition switch to OFF.

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

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

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

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

Standard resistance:

(h) Disconnect the service wire from connector C.

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

Standard resistance:

NG -- REPLACE NO. 2 FLOOR WIRE
OK -- Continue to next step.

8. CHECK SIDE AIRBAG SENSOR RH

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

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

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

(d) Clear the DTCs stored in the memory Reading and Clearing Diagnostic Trouble Codes.

(e) Turn the ignition switch to OFF.

(f) Turn the ignition switch to ON, and wait for at least 90 seconds.

(g) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

Result

(h) Turn the ignition switch to OFF.

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

(j) Return the side airbag sensor LH and RH to their original position and connect the connectors to them.

A -- USE SIMULATION METHOD TO CHECK Diagnosis System

B -- REPLACE SIDE AIRBAG SENSOR ASSEMBLY RH Removal
C -- Continue to next step.

9. CHECK REAR AIRBAG SENSOR RH

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

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

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

(d) Clear the DTCs stored in the memory Reading and Clearing Diagnostic Trouble Codes.

(e) Turn the ignition switch to OFF.

(f) Turn the ignition switch to ON, and wait for at least 90 seconds.

(g) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

Result

HINT
Codes other than DTC B1642 and B1647 may be output at this time, but they are not related to this check.

(h) Turn the ignition switch to OFF.

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

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

A -- REPLACE REAR AIRBAG SENSOR RH Removal

B -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Removal

C -- USE SIMULATION METHOD TO CHECK Diagnosis System

10. CHECK CONNECTION OF CONNECTORS

(a) Turn the ignition switch to 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 center airbag sensor and side airbag sensor LH.

OK:

The connectors are properly connected.

NG -- CONNECT CONNECTORS PROPERLY
OK -- Continue to next step.

11. CHECK CONNECTORS

(a) Disconnect the connectors from the center airbag sensor and side airbag sensor LH.

(b) Check that the connectors (on the center airbag sensor side and side airbag sensor LH side) are not damaged.

OK:

The connectors are not deformed or damaged.

NG -- REPLACE FLOOR WIRE
OK -- Continue to next step.

12. CHECK FLOOR WIRE (CENTER AIRBAG SENSOR - SIDE AIRBAG SENSOR LH)

(d) Turn the ignition switch to OFF.

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

(f) Using a service wire, connect terminals 8 (BBL+) and 15 (BBL-) of connector B.

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

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

Standard resistance:

(h) Disconnect the service wire from connector B.

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

Standard resistance:

NG -- REPLACE FLOOR WIRE
OK -- Continue to next step.

13. CHECK CONNECTION OF CONNECTOR

(a) Check that the connector is properly connected to the rear airbag sensor LH.

OK:

The connector is properly connected.

NG -- CONNECT CONNECTORS PROPERLY
OK -- Continue to next step.

14. CHECK CONNECTORS

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

(b) Check that the connector (on the rear airbag sensor LH side) is not damaged.

OK:

The connector is not deformed or damaged.

NG -- REPLACE FLOOR WIRE
OK -- Continue to next step.

15. CHECK FLOOR WIRE (SIDE AIRBAG SENSOR LH - REAR AIRBAG SENSOR LH)

(d) Turn the ignition switch to OFF.

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

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

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

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

Standard resistance:

(h) Disconnect the service wire from connector C.

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

Standard resistance:

NG -- REPLACE FLOOR WIRE
OK -- Continue to next step.

16. CHECK SIDE AIRBAG SENSOR LH

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

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

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

(d) Clear the DTCs stored in the memory Reading and Clearing Diagnostic Trouble Codes.

(e) Turn the ignition switch to OFF.

(f) Turn the ignition switch to ON, and wait for at least 90 seconds.

(g) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

Result

(h) Turn the ignition switch to OFF.

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

(j) Return the side airbag sensor RH and LH to their original position and connect the connectors to them.

A -- REPLACE SIDE AIRBAG SENSOR ASSEMBLY LH Removal

B -- USE SIMULATION METHOD TO CHECK Diagnosis System
C -- Continue to next step.

17. CHECK REAR AIRBAG SENSOR LH

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

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

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

(d) Clear the DTCs stored in the memory Reading and Clearing Diagnostic Trouble Codes.

(e) Turn the ignition switch to OFF.

(f) Turn the ignition switch to ON, and wait for at least 90 seconds.

(g) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

Result