Part 1

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

B1647/82 - Lost Communication with Side Satellite Sensor Bus LH

DESCRIPTION

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

The side airbag sensor LH or RH, door 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 stored when a malfunction is detected in the circuit for the side collision sensor LH or RH (to determine deployment of the front seat airbag LH or RH and curtain shield airbag LH or RH).





WIRING DIAGRAM









INSPECTION PROCEDURE

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

PROCEDURE

1. CHECK FOR DTC

(a) Turn the ignition switch 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





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

B -- CHECK CONNECTION OF CONNECTORS

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

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 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.





Text in Illustration





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





Text in Illustration





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

Standard Voltage:





(c) Turn the ignition switch off.

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

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

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

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

Standard Resistance:





(g) Disconnect the service wire from connector B.

(h) 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 CONNECTOR

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

OK:

The connector is properly connected.

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

6. CHECK CONNECTORS

(a) Disconnect the connector from the 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.





Text in Illustration





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

7. CHECK REAR AIRBAG SENSOR RH CIRCUIT

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





Text in Illustration





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

Standard Voltage:





(c) Turn the ignition switch off.

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

(e) Using a service wire, connect terminals 4 (BCR+) and 3 (BCR-) of connector C.

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

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

Standard Resistance:





(g) Disconnect the service wire from connector C.

(h) 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 CONNECTION OF CONNECTORS

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

OK:

The connector is properly connected.

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

9. CHECK CONNECTORS

(a) Disconnect the connector from the door side airbag sensor RH.

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

OK:

The connector is not deformed or damaged.





Text in Illustration





NG -- REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.

10. CHECK DOOR SIDE AIRBAG SENSOR RH CIRCUIT

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





Text in Illustration





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

Standard Voltage:





(c) Turn the ignition switch off.

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

(e) Using a service wire, connect terminals 2 (BDR+) and 1 (BDR-) of connector E.

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

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

Standard Resistance:





(g) Disconnect the service wire from connector E.

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

Standard Resistance:





NG -- CHECK NO. 2 FLOOR WIRE (REAR AIRBAG SENSOR RH - FRONT DOOR WIRE RH)
OK -- Continue to next step.

11. CHECK SIDE AIRBAG SENSOR RH

(a) Connect the connectors to the center airbag sensor, rear airbag sensor RH and door side airbag sensor.





(b) Interchange the side airbag sensor 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 stored in memory Reading and Clearing Diagnostic Trouble Codes.

(f) Turn the ignition switch off.

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

(h) 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.

Text in Illustration





(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 LH and RH to their original positions and connect the connectors to them.

B -- REPLACE SIDE AIRBAG SENSOR ASSEMBLY RH Removal

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

12. CHECK REAR AIRBAG SENSOR RH

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





(b) Connect the cable to the negative (-) battery terminal, 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 memory Reading and Clearing Diagnostic Trouble Codes.

(e) Turn the ignition switch 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.

Text in Illustration





(h) Turn the ignition switch off.

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

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

B -- REPLACE REAR AIRBAG SENSOR RH Removal

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

13. CHECK DOOR SIDE AIRBAG SENSOR RH

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





(b) Connect the cable to the negative (-) battery terminal, 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 memory Reading and Clearing Diagnostic Trouble Codes.

(e) Turn the ignition switch 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.

Text in Illustration





(h) Turn the ignition switch off.

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

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

B -- REPLACE DOOR SIDE AIRBAG SENSOR RH Removal

A -- USE SIMULATION METHOD TO CHECK Diagnosis System

C -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Removal

14. CHECK NO. 2 FLOOR WIRE (REAR AIRBAG SENSOR RH - FRONT DOOR WIRE RH)

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





Text in Illustration





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

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

Standard Voltage:





(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 2 (BDR+) and 1 (BDR-) of connector C.

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:





(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 -- REPLACE FRONT DOOR WIRE RH Disassembly

15. 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 center airbag sensor and side airbag sensor LH.

OK:

The connectors are properly connected.

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