Part 1

SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1627/82, B1628/82, B1637/82, B1638/82, B1647/82, B1697/82, B1698/82: Lost communication with Side Airbag Sensor LH
B1698/82 - Door Side Airbag Sensor LH Initialization Incomplete

DESCRIPTION

The side collision sensor LH circuit (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 (for rear side), rear airbag sensor LH and side airbag sensor LH (for front side).

The side airbag sensor LH (for rear side), rear airbag sensor LH and side airbag sensor LH (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 stored when a malfunction is detected for the side collision sensor LH circuit (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 for present 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 ignition switch off and then on (IG) again.
* Codes other than present DTCs B1627, B1628, B1637, B1638, B1647, B1697, B1698 and 82 may be output at this time, but they are not related to this check.

D -- CHECK PRESENT DTC

C -- CHECK CONNECTORS

B -- CHECK PAST DTC
A -- Continue to next step.

2. CHECK 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 assembly, side airbag sensor LH (for rear side), rear airbag sensor LH and side airbag sensor LH (for front side). Also check that the connectors that link the No. 2 floor wire and front door wire LH 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 LH (for rear side), rear airbag sensor LH and side airbag sensor LH (for front side). Also disconnect the connectors that link the No. 2 floor wire and front door wire LH.

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

OK:

The terminals are not deformed or damaged.

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

3. CHECK NO. 2 FLOOR WIRE (OPEN)

(a) Using SST, connect terminals 24 (BBL+) and 23 (BBL-) 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:

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

4. CHECK NO. 2 FLOOR WIRE (SHORT)

(a) Disconnect SST from connector B.

(b) 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 NO. 2 FLOOR WIRE (SHORT TO B+)

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

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

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

Standard Voltage:

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

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

(a) Turn the ignition switch off.

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

(c) 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.

7. CHECK NO. 2 FLOOR WIRE (OPEN)

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

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

8. CHECK NO. 2 FLOOR WIRE (SHORT)

(a) Disconnect SST from connector C.

(b) 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.

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

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

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

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

Standard Voltage:

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

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

(a) Turn the ignition switch off.

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

(c) 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.

11. CHECK WIRE HARNESS (OPEN)

(a) Connect the connectors that link the No. 2 floor wire and front door wire LH.

(b) Using SST, connect terminals 2 (BDL+) and 1 (BDL-) 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:

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

12. 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:

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

13. CHECK WIRE HARNESS (SHORT TO B+)

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

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

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

Standard Voltage:

NG -- CHECK FRONT DOOR WIRE LH (SHORT TO B+)
OK -- Continue to next step.

14. CHECK WIRE HARNESS (SHORT TO GROUND)

(a) Turn the ignition switch off.

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

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

Standard Resistance:

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

15. CHECK SIDE AIRBAG SENSOR LH (FOR REAR SIDE)

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

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

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

(d) Turn the ignition 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 ignition switch off.

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

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

Result:

HINT
Codes other than DTCs B1642 or 81 and B1647 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 LH (FOR REAR SIDE) Removal
A -- Continue to next step.

16. CHECK REAR AIRBAG SENSOR LH

(a) Turn the ignition switch off.

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

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

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

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

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

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

(h) Turn the ignition switch off.

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

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

Result:

HINT
Codes other than DTCs B1642 or 81 and B1647 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 LH Removal
A -- Continue to next step.

17. CHECK SIDE AIRBAG SENSOR LH (FOR FRONT SIDE)

(a) Turn the ignition switch off.

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

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

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

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

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

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

(h) Turn the ignition switch off.

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

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

Result:

HINT
Codes other than DTCs B1642 or 81 and B1647 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 LH (FOR FRONT SIDE) Removal

A -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Removal

18. CHECK PAST DTC

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

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

Result:

HINT
Codes other than past DTCs B1627 and B1637 may be output at this time, but they are not related to this check.

C -- CHECK REAR AIRBAG SENSOR LH

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

19. CHECK PRESENT DTC

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

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

Result:

HINT
Codes other than present DTCs B1628 and B1638 may be output at this time, but they are not related to this check.

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

20. CHECK 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 assembly, side airbag sensor LH (for rear side) and rear airbag sensor LH.

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 LH (for rear side) and rear airbag sensor LH.

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

OK:

The terminals are not deformed or damaged.

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

21. CHECK NO. 2 FLOOR WIRE (OPEN)

(a) Using SST, connect terminals 24 (BBL+) and 23 (BBL-) of connector B.

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

22. CHECK NO. 2 FLOOR WIRE (SHORT)

(a) Disconnect SST from connector B.

(b) 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.

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

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

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

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

Standard Voltage:

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

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

(a) Turn the ignition switch off.

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

(c) 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.

25. CHECK NO. 2 FLOOR WIRE (OPEN)

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

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

26. CHECK NO. 2 FLOOR WIRE (SHORT)

(a) Disconnect SST from connector C.

(b) 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.

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

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

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

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

Standard Voltage:

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

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

(a) Turn the ignition switch off.

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

(c) 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.

29. CHECK SIDE AIRBAG SENSOR LH (FOR REAR SIDE)

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