Up to 08/2009

SUPPLEMENTAL RESTRAINT SYSTEMS: 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 side collision sensor RH circuit (to determine deployment of the front seat side airbag assembly RH, rear 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.

Theses DTCs are recorded when a malfunction is detected for the side collision sensor RH circuit (to determine deployment of the front seat side airbag assembly RH, rear seat side airbag assembly RH and curtain shield airbag assembly RH).

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK PRESENT DTC

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

(b) Check for present DTCs DTC Check / Clear.

Result:

HINT
* DTCs indicating communication errors will be changed to DTCs indicating errors in initialization by turning the engine switch off and then to 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.
E -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting

D -- CHECK SIDE AIRBAG SENSOR RH

C -- CHECK CONNECTORS

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

2. CHECK PAST DTC

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

(b) Check for past DTCs DTC Check / Clear.

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 RH

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

3. CHECK CONNECTORS

(a) Turn the engine switch off.

(b) Disconnect the cable from the negative (-) battery terminal.

NOTICE:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(c) Check that the connectors are properly connected to the center airbag sensor assembly, side airbag sensor RH and rear airbag sensor RH.

OK:

The connectors are properly connected.

HINT
If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

(d) Disconnect the connectors from the center airbag sensor assembly, side airbag sensor RH and rear airbag sensor RH.

(e) Check that the terminals of connectors are not damaged.

OK:

The terminals are not deformed or damaged.

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

4. CHECK FLOOR WIRE (OPEN)

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

NOTICE:
Do not forcibly insert SST into the terminals of the connector when connecting.

SST : 09843-18040

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

Standard Resistance:

Text in Illustration

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

5. CHECK FLOOR WIRE (SHORT)

(a) Disconnect SST from connector B.

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

Standard Resistance:

Text in Illustration

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

6. CHECK FLOOR WIRE (SHORT TO B+)

(a) Connect the cable to the negative (-) battery terminal.

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

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

Standard Voltage:

Text in Illustration

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

7. CHECK FLOOR WIRE (SHORT TO GROUND)

(a) Turn the engine switch off.

Text in Illustration

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

8. CHECK FLOOR WIRE (OPEN)

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

Text in Illustration

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

9. CHECK FLOOR WIRE (SHORT)

(a) Disconnect SST from connector C.

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

Standard Resistance:

Text in Illustration

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

10. CHECK FLOOR WIRE (SHORT TO B+)

(a) Connect the cable to the negative (-) battery terminal.

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

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

Standard Voltage:

Text in Illustration

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

11. CHECK FLOOR WIRE (SHORT TO GROUND)

(a) Turn the engine switch off.

Text in Illustration

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

12. CHECK SIDE AIRBAG SENSOR RH

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

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

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

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

(e) Clear the DTCs stored in the the memory DTC Check / Clear.

(f) Turn the engine switch off.

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

(h) Check for DTCs DTC Check / Clear.

Result:

Text in Illustration

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 How To Proceed With Troubleshooting

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

13. CHECK REAR AIRBAG SENSOR RH

(a) Turn the engine switch off.

(b) Disconnect the cable from the negative (-) battery terminal.

NOTICE:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

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

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

(e) Connect the cable to the negative (-) battery terminal.

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

(g) Clear the DTCs stored in the memory DTC Check / Clear.

(h) Turn the engine switch off.

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

(j) Check for DTCs DTC Check / Clear.

Result:

Text in Illustration

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 -- REPLACE REAR AIRBAG SENSOR RH

B -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Removal

A -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting

14. CHECK CONNECTORS

(a) Turn the engine switch off.

(b) Disconnect the cable from the negative (-) battery terminal.

NOTICE:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(c) Check that the connectors are properly connected to the side airbag sensor RH and rear airbag sensor RH.

OK:

The connectors are properly connected.

HINT
If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

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

(e) Check that the terminals of connectors are not damaged.

OK:

The terminals are not deformed or damaged.

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

15. CHECK FLOOR WIRE (OPEN)

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

Text in Illustration

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

16. CHECK FLOOR WIRE (SHORT)

(a) Disconnect SST from connector C.

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

Standard Resistance:

Text in Illustration

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

17. CHECK FLOOR WIRE (SHORT TO B+)

(a) Connect the cable to the negative (-) battery terminal.

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

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

Standard Voltage:

Text in Illustration

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

18. CHECK FLOOR WIRE (SHORT TO GROUND)

(a) Turn the engine switch off.

Text in Illustration

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

19. CHECK SIDE AIRBAG SENSOR RH

(a) Connect the connector to the rear airbag sensor RH.

Text in Illustration

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

C -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting

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

20. CHECK REAR AIRBAG SENSOR RH

(a) Turn the engine switch off.

(b) Disconnect the cable from the negative (-) battery terminal.

NOTICE:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

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

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

(e) Connect the cable to the negative (-) battery terminal.

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

(g) Clear the DTCs stored in the the memory DTC Check / Clear.

(h) Turn the engine switch off.

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

(j) Check for DTCs DTC Check / Clear.

Result:

Text in Illustration

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

C -- REPLACE REAR AIRBAG SENSOR RH

B -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Removal

A -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting

21. CHECK SIDE AIRBAG SENSOR RH

(a) Turn the engine switch off.

(b) Disconnect the cable from the negative (-) battery terminal.

NOTICE:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

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

(d) Connect the cable to the negative (-) battery terminal.

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

(f) Clear the DTCs stored in the the memory DTC Check / Clear.

(g) Turn the engine switch off.

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

(i) Check for DTCs DTC Check / Clear.

Result:

Text in Illustration

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

C -- REPLACE SIDE AIRBAG SENSOR RH

B -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Removal

A -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting