Part 1

SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: B1622/81,B1623/81,B1632/81,B1633/81,B1642/81,B1643/81,B1692/81,B1693/81: Lost communication with Side Airbag Sensor RH
B1693/81 - Door Side Airbag Sensor 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 (for rear side), rear airbag sensor RH and side airbag sensor RH (for front side).

The side airbag sensor RH (for rear side), rear airbag sensor RH and side airbag sensor RH (for front side) 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 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 the 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 on (IG) again.
* Codes other than present DTC B1622, B1623, B1632, B1633, B1642, B1643, B1692, B1693 and 81 may be output at this time, but they are not related to this check.
E -- CHECK PRESENT DTC

D -- CHECK CONNECTORS

C -- CHECK PAST DTC

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 the past DTCs DTC Check / Clear.

Result:

HINT
Codes other than past DTC B1622 and B1692 may be output at this time, but they are not related to this check.

C -- CHECK CONNECTORS

B -- CHECK SIDE AIRBAG SENSOR RH (FOR REAR SIDE)
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 (for rear side), rear airbag sensor RH and side airbag sensor RH (for front side). Also check that the connectors that link the floor wire and front door wire RH are properly connected.

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 (for rear side), rear airbag sensor RH and side airbag sensor RH (for front side). Also disconnect the connectors that link the floor wire and front door wire RH.

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

OK:

The terminals are not deformed or damaged.

NG -- REPLACE WIRE HARNESS
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 4 (BCR+) and 3 (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 WIRE HARNESS (OPEN)

(a) Connect the connectors that link the floor wire and front door wire RH.

(b) Using SST, connect terminals 2 (BDR+) and 1 (BDR-) of connector E.

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

SST : 09843-18040

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

Standard Resistance:

Text in Illustration

NG -- CHECK FRONT DOOR WIRE RH (OPEN)
OK -- Continue to next step.

13. CHECK WIRE HARNESS (SHORT)

(a) Disconnect SST from connector E.

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

Standard Resistance:

Text in Illustration

NG -- CHECK FRONT DOOR WIRE RH (SHORT)
OK -- Continue to next step.

14. CHECK WIRE HARNESS (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 -- CHECK FRONT DOOR WIRE RH (SHORT TO B+)
OK -- Continue to next step.

15. CHECK WIRE HARNESS (SHORT TO GROUND)

(a) Turn the engine switch off.

Text in Illustration

NG -- CHECK FRONT DOOR WIRE RH (SHORT TO GROUND)
OK -- Continue to next step.

16. CHECK SIDE AIRBAG SENSOR RH (FOR REAR SIDE)

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

(b) Interchange the side airbag sensor LH (for rear side) with side airbag sensor RH (for rear side) and connect the connectors.

(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 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 B1642, B1643, or 81 and 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 (FOR REAR SIDE)
A -- Continue to next step.

17. 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 (for rear side) and side airbag sensor RH (for rear side) to their original positions and connect the connectors.

(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 B1642, B1643, or 81 and 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 REAR AIRBAG SENSOR RH
A -- Continue to next step.

18. CHECK SIDE AIRBAG SENSOR RH (FOR FRONT SIDE)

(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 rear airbag sensor LH and RH to their original positions and connect the connectors.

(d) Interchange the side airbag sensor LH (for front side) with side airbag sensor RH (for front side) and connect the connectors.

(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 B1642, B1643, or 81 and 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 (FOR FRONT SIDE) Removal

A -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Removal

19. CHECK PAST DTC

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

(b) Check the 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 REAR AIRBAG SENSOR RH

B -- CHECK SIDE AIRBAG SENSOR RH (FOR REAR SIDE)
A -- Continue to next step.

20. CHECK PRESENT DTC

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

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

Result:

HINT
Codes other than present DTC B1623 and B1633 may be output at this time, but they are not related to this check.

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

21. 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 (for rear side) 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 (for rear side) 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.

22. CHECK FLOOR WIRE (OPEN)

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

Text in Illustration

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

23. 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.

24. 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.

25. CHECK FLOOR WIRE (SHORT TO GROUND)

(a) Turn the engine switch off.

Text in Illustration

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

26. CHECK FLOOR WIRE (OPEN)

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

Text in Illustration

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

27. 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.