Lost Communication with Driver Side - Side Airbag Sensor Assembly - Airbag System (for TMC Made)

SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM (for TMC Made): B1622/81,B1623/81,B1632/81,B1633/81,B1642/81,B1643/81: Lost Communication with Driver Side - Side Airbag Sensor Assembly
B1643/81 - Driver Side Satellite Sensor Bus Initialization Incomplete

DESCRIPTION

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

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

DTC B1622/81, B1623/81, B1632/81, B1633/81, B1642/81, or B1643/81 is recorded when a malfunction is detected in the circuit for the side collision sensor LH (to determine deployment of the front seat side airbag assembly LH and curtain shield airbag assembly LH).

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK PRESENT DTC

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

(b) Check the present DTCs Airbag System (for TMC Made).

Result:

HINT
* DTCs indicating communication errors will be changed to DTCs indicating errors in initialization by turning the ignition switch off and then on (IG) again.
* Codes other than present DTC B1622, B1623, B1632, B1633, B1642, B1643, and 81 may be output at this time, but they are not related to this check.

E -- USE SIMULATION METHOD TO CHECK Diagnosis System

D -- CHECK SIDE AIRBAG SENSOR LH

C -- CHECK CONNECTION OF CONNECTORS

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

2. CHECK PAST DTC

(a) Check the past DTCs Airbag System (for TMC Made).

Result:

HINT
Codes other than past DTC B1622 and B1632 may be output at this time, but they are not related to this check.

C -- CHECK SIDE AIRBAG SENSOR LH

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

3. 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 center airbag sensor assembly and the side airbag sensor LH.

OK:

The connectors are properly connected.

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

4. CHECK CONNECTORS

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

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

OK:

The connectors are not deformed or damaged.

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

5. CHECK FLOOR WIRE (OPEN)

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

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

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

Standard resistance:

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

6. CHECK FLOOR WIRE (SHORT)

(a) Disconnect the service wire from connector B.

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

Standard resistance:

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

7. CHECK FLOOR WIRE (SHORT TO B+)

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

(b) Turn the ignition switch on (IG).

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

Standard voltage:

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

8. CHECK FLOOR WIRE (SHORT 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:

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

9. 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 on (IG), and wait for at least 60 seconds.

(d) Clear the DTCs stored in the the memory Airbag System (for TMC Made).

(e) Turn the ignition switch off.

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

(g) Check the DTCs Airbag System (for TMC Made).

Result:

(b) 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.

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

Standard resistance:

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

13. CHECK FLOOR WIRE (SHORT)

(a) Disconnect the service wire from connector C.

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

Standard resistance:

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

14. CHECK FLOOR WIRE (SHORT TO B+)

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

(b) Turn the ignition switch on (IG).

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

Standard voltage:

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

15. CHECK FLOOR WIRE (SHORT 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:

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

16. 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 on (IG), and wait for at least 60 seconds.

(d) Clear the DTCs stored in the memory Airbag System (for TMC Made).

(e) Turn the ignition switch off.

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

(g) Check the DTCs Airbag System (for TMC Made).

Result:

HINT
Codes other than DTC B1623, B1642, B1643, or 81 and B1628, B1647, B1648, or 82 may be output at this time, but they are not related to this check.

C -- USE SIMULATION METHOD TO CHECK Diagnosis System

B -- REPLACE REAR AIRBAG SENSOR LH Removal
A -- Continue to next step.

17. CHECK CENTER 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) Return the rear airbag sensor RH and LH to their original positions and connect the connectors to them.

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

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

(f) Clear the DTCs stored in the memory Airbag System (for TMC Made).

(g) Turn the ignition switch off.

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

(i) Check the DTCs Airbag System (for TMC Made).

OK:

DTC B1623, B1642, B1643, or 81 is not output.

HINT
Codes other than DTC B1623, B1642, B1643, and 81 may be output at this time, but they are not related to this check.

NG -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Removal

OK -- USE SIMULATION METHOD TO CHECK Diagnosis System

18. 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 center airbag sensor assembly and the side airbag sensor LH.

OK:

The connectors are properly connected.

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

19. CHECK CONNECTORS

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

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

OK:

The connectors are not deformed or damaged.

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

20. CHECK FLOOR WIRE (OPEN)

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

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

21. CHECK FLOOR WIRE (SHORT)

(a) Disconnect the service wire from connector B.

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

Standard resistance:

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

22. CHECK FLOOR WIRE (SHORT TO B+)

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

(b) Turn the ignition switch on (IG).

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

Standard voltage:

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

23. CHECK FLOOR WIRE (SHORT 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:

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

24. 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 on (IG), and wait for at least 60 seconds.

(d) Clear the DTCs stored in the memory Airbag System (for TMC Made).

(e) Turn the ignition switch off.

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

(g) Check the DTCs Airbag System (for TMC Made).

Result:

HINT
Codes other than DTC B1632 or B1633 and B1637 or B1638 may be output at this time, but they are not related to this check.

C -- USE SIMULATION METHOD TO CHECK Diagnosis System

B -- REPLACE SIDE AIRBAG SENSOR LH Removal
A -- Continue to next step.

26. CHECK CENTER 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) Return the side airbag sensor RH and LH to their original positions and connect the connectors to them.

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

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

(f) Clear the DTCs stored in the memory Airbag System (for TMC Made).

(g) Turn the ignition switch off.

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

(i) Check the DTCs Airbag System (for TMC Made).

OK:

DTC B1632 or B1633 is not output.

HINT
Codes other than DTC B1632 and B1633 may be output at this time, but they are not related to this check.

NG -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Removal

OK -- USE SIMULATION METHOD TO CHECK Diagnosis System

27. CHECK SIDE AIRBAG SENSOR LH

(a) Turn the ignition switch off.

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

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

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

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

(f) Clear the DTCs stored in the memory Airbag System (for TMC Made).

(g) Turn the ignition switch off.

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

(i) Check the DTCs Airbag System (for TMC Made).

Result:

HINT
Codes other than DTC B1622 and B1627 may be output at this time, but they are not related to this check.

C -- USE SIMULATION METHOD TO CHECK Diagnosis System

B -- REPLACE SIDE AIRBAG SENSOR LH Removal
A -- Continue to next step.

28. CHECK CENTER 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) Return the side airbag sensor RH and LH to their original positions and connect the connectors to them.

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

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

(f) Clear the DTCs stored in the memory Airbag System (for TMC Made).

(g) Turn the ignition switch off.

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

(i) Check the DTCs Airbag System (for TMC Made).

OK:

DTC B1622 is not output.

HINT
Codes other than DTC B1622 may be output at this time, but they are not related to this check.

NG -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Removal

OK -- USE SIMULATION METHOD TO CHECK Diagnosis System