B1642

SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1622/81: Lost Communication with Driver Side - Side Airbag Sensor Assembly

DTC B1622/81 - Lost Communication with Driver Side - Side Airbag Sensor Assembly

DTC B1623/81 - Driver Side - Side Airbag Sensor Assembly Initialization Incomplete

DTC B1632/81 - Lost Communication with Driver Side Rear Airbag Sensor

DTC B1633/81 - Driver Side Rear Airbag Sensor Initialization Incomplete

DTC B1642/81 - Lost Communication with Driver Side Satellite Sensor Bus

DTC 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.
These DTCs are 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 engine switch on (IG), and wait for at least 60 seconds.
(b) Clear the DTCs stored in the memory DTC Check / Clear.
(c) Turn the engine switch off.
(d) Turn the engine switch on (IG), and wait for at least 60 seconds.
(e) Check the 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 DTC B1622, B1623, B1632, B1633, B1642, B1643, and 81 may be output at this time, but they are not related to this check.

C -- USE SIMULATION METHOD TO CHECK
B -- CHECK CONNECTION OF CONNECTORS
A -- Continue to next step.
2. CHECK PAST DTC
(a) Check the past DTCs DTC Check / Clear.
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 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 VEHICLE CONDITION
(a) Check whether or not the vehicle is equipped with the rear side airbag.
Result:
A
with the rear side airbag
B
without the rear side airbag
B -- CHECK FLOOR WIRE (OPEN)
A -- Continue to next step.
6. CHECK FLOOR WIRE (OPEN)

(a) Using a service wire, connect terminals 24 (BBD+) and 23 (BBD-) of connector B.
NOTE:
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 -- REPAIR OR REPLACE FLOOR WIRE
OK -- Continue to next step.
7. 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.
8. 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 engine 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.
9. CHECK FLOOR WIRE (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 -- REPAIR OR REPLACE FLOOR WIRE
OK -- Continue to next step.
10. CHECK SIDE AIRBAG SENSOR LH

(a) Connect the connector to the center airbag sensor assembly.
(b) Interchange the side airbag sensor RH with LH 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 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 the DTCs DTC Check / Clear.
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.

C -- CHECK CONNECTION OF CONNECTOR
B -- REPLACE SIDE AIRBAG SENSOR LH
A -- USE SIMULATION METHOD TO CHECK
11. CHECK FLOOR WIRE (OPEN)

(a) Using a service wire, connect terminals 8 (BBD+) and 15 (BBD-) of connector B.
NOTE:
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 -- REPAIR OR REPLACE FLOOR WIRE
OK -- Continue to next step.
12. 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.
13. CHECK FLOOR WIRE (SHORT TO B+)

NG -- REPAIR OR REPLACE FLOOR WIRE
OK -- Continue to next step.
14. CHECK FLOOR WIRE (SHORT TO GROUND)

NG -- REPAIR OR REPLACE FLOOR WIRE
OK -- Continue to next step.
15. CHECK SIDE AIRBAG SENSOR LH

(a) Using a service wire, connect terminals 2 (BCL+) and 1 (BCL-) of connector C.
NOTE:
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 -- REPAIR OR REPLACE FLOOR WIRE
OK -- Continue to next step.
19. 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.
20. CHECK FLOOR WIRE (SHORT TO B+)

NG -- REPAIR OR REPLACE FLOOR WIRE
OK -- Continue to next step.
21. CHECK FLOOR WIRE (SHORT TO GROUND)

NG -- REPAIR OR REPLACE FLOOR WIRE
OK -- Continue to next step.
22. CHECK REAR AIRBAG SENSOR LH

(a) Connect the connectors to the side airbag sensor LH.
(b) Interchange the rear airbag sensor RH with LH 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 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 the DTCs DTC Check / Clear.
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.

C -- USE SIMULATION METHOD TO CHECK
B -- REPLACE REAR AIRBAG SENSOR LH
A -- Continue to next step.
23. 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 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 engine switch on (IG), and wait for at least 60 seconds.
(f) Clear the DTCs stored in 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 the DTCs DTC Check / Clear.
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
OK -- USE SIMULATION METHOD TO CHECK
24. 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 LH.
OK:
The connectors are properly connected.
NG -- CONNECT CONNECTORS PROPERLY
OK -- Continue to next step.
25. 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.
26. CHECK VEHICLE CONDITION
(a) Check whether or not the vehicle is equipped with the rear side airbag.
Result:
A
with the rear side airbag
B
without the rear side airbag
B -- CHECK FLOOR WIRE (OPEN)
A -- Continue to next step.
27. CHECK FLOOR WIRE (OPEN)

NG -- REPAIR OR REPLACE FLOOR WIRE
OK -- Continue to next step.
28. 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.
29. CHECK FLOOR WIRE (SHORT TO B+)

NG -- REPAIR OR REPLACE FLOOR WIRE
OK -- Continue to next step.
30. CHECK FLOOR WIRE (SHORT TO GROUND)

NG -- REPAIR OR REPLACE FLOOR WIRE
OK -- Continue to next step.
31. CHECK SIDE AIRBAG SENSOR LH

(a) Connect the connector to the center airbag sensor assembly.
(b) Interchange the side airbag sensor RH with LH 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 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 the DTCs DTC Check / Clear.
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
B -- REPLACE SIDE AIRBAG SENSOR LH
A -- Continue to next step.
32. 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 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 engine switch on (IG), and wait for at least 60 seconds.
(f) Clear the DTCs stored in 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 the DTCs DTC Check / Clear.
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
OK -- USE SIMULATION METHOD TO CHECK
33. CHECK FLOOR WIRE (OPEN)

NG -- REPAIR OR REPLACE FLOOR WIRE
OK -- Continue to next step.
34. 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.
35. CHECK FLOOR WIRE (SHORT TO B+)

NG -- REPAIR OR REPLACE FLOOR WIRE
OK -- Continue to next step.
36. CHECK FLOOR WIRE (SHORT TO GROUND)

NG -- REPAIR OR REPLACE FLOOR WIRE
OK -- Continue to next step.
37. CHECK SIDE AIRBAG SENSOR LH

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
B -- REPLACE SIDE AIRBAG SENSOR LH
A -- Continue to next step.
38. 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 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 engine switch on (IG), and wait for at least 60 seconds.
(f) Clear the DTCs stored in 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 the DTCs DTC Check / Clear.
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
OK -- USE SIMULATION METHOD TO CHECK