B1623

SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1622/81, B1623/81, B1632/81, B1633/81, B1642/81, B1643/81: Lost communication with Side Airbag Sensor RH
B1643/81 - Side Satellite Sensor Bus RH Initialization Incomplete

DESCRIPTION

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) is composed of the center airbag sensor assembly, side airbag sensor RH, and rear airbag sensor RH.

The side airbag sensor RH and rear 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.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC

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

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

(c) Turn the engine switch off.

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

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

Result:

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

B -- CHECK CONNECTION OF CONNECTORS

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

2. CHECK PAST DTC

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

Result:

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

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

3. CHECK CONNECTION OF CONNECTORS

(a) Turn the engine 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 RH.

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 RH.

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

OK:

The connectors are not deformed or damaged.

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

5. CHECK FLOOR WIRE NO. 2 (OPEN)

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

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

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

Standard resistance:

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

6. CHECK FLOOR WIRE NO. 2 (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 -- REPLACE FLOOR WIRE NO. 2
OK -- Continue to next step.

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

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

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

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

Standard voltage:

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

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

(a) Turn the engine 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 -- REPLACE FLOOR WIRE NO. 2
OK -- Continue to next step.

9. CHECK SIDE AIRBAG SENSOR RH

(a) Connect the connectors to the center airbag sensor assembly.

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

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

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

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

(f) Turn the engine switch off.

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

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

Result:

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

13. CHECK FLOOR WIRE NO. 2 (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 -- REPLACE FLOOR WIRE NO. 2
OK -- Continue to next step.

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

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

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

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

Standard voltage:

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

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

(a) Turn the engine 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 -- REPLACE FLOOR WIRE NO. 2
OK -- Continue to next step.

16. CHECK REAR AIRBAG SENSOR RH

(a) Connect the connectors to the side airbag sensor RH.

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

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

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

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

(f) Turn the engine switch off.

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

(h) Check the DTCs Reading and Clearing Diagnostic Trouble Codes.

Result:

HINT
Codes other than DTC B1623, B1632, B1633, B1642, B1643, or 81 and DTC B1628, B1637, B1638, B1647, B1648 or 82 may be output at this time, but they are not related to this check.

B -- REPLACE REAR AIRBAG SENSOR RH Removal

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

17. CHECK CENTER AIRBAG SENSOR ASSEMBLY

(a) Turn the engine switch off.

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

(c) Return the rear airbag sensor LH and RH 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 engine switch on (IG), and wait for at least 60 seconds.

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

(g) Turn the engine switch off.

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

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

OK:

DTC B1623, B1632, B1633, B1642, B1643 or 81 is not output.

HINT
Codes other than DTC B1623, B1632, B1633, 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 engine 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 RH.

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 RH.

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

OK:

The connectors are not deformed or damaged.

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

20. CHECK FLOOR WIRE NO. 2 (OPEN)

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

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

21. CHECK FLOOR WIRE NO. 2 (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 -- REPLACE FLOOR WIRE NO. 2
OK -- Continue to next step.

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

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

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

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

Standard voltage:

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

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

(a) Turn the engine 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 -- REPLACE FLOOR WIRE NO. 2
OK -- Continue to next step.

24. CHECK SIDE AIRBAG SENSOR RH

(a) Connect the connectors to the center airbag sensor assembly.

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

B -- REPLACE SIDE AIRBAG SENSOR RH Removal

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

25. CHECK CENTER AIRBAG SENSOR ASSEMBLY

(a) Turn the engine switch off.

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

(c) Return the side airbag sensor LH and RH 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 engine switch on (IG), and wait for at least 60 seconds.

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

(g) Turn the engine switch off.

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

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

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