Part 1

SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM (for Built-in Type Yaw Rate Sensor): B1622/81, B1623/81, B1632/81, B1633/81, B1642/81, 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 airbag assembly RH, rear seat airbag assembly RH, curtain shield airbag assembly RH and front seat outer belt assembly RH) is composed of the airbag sensor assembly, side airbag sensor assembly RH, side No. 2 airbag sensor assembly RH and door side airbag sensor RH.

The side airbag sensor assembly RH, side No. 2 airbag sensor assembly RH and door side airbag sensor RH detect impacts to the vehicle and send signals to the airbag sensor assembly to determine if the airbag and pretensioner should be deployed.

These DTCs are stored when a malfunction is detected for the side collision sensor RH circuit.

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:
After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work Service Precautions.

PROCEDURE

1. CHECK CURRENT DTC

(a) Check for current DTCs Built-in Type Yaw Rate Sensor.

Result:

HINT
* DTCs indicating communication errors will be changed to DTCs indicating errors in initialization by turning the power switch off and then to on (IG) again.
* Codes other than current DTCs B1622, B1623, B1632, B1633, B1642, B1692, B1693 and 81 may be output at this time, but they are not related to this check.

B -- CHECK HISTORY DTC

C -- CHECK CONNECTORS

D -- CHECK CURRENT DTC

E -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting
A -- Continue to next step.

2. CHECK CONNECTORS

(a) Turn the power switch off.

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

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

(c) Check that the connectors are properly connected to the airbag sensor assembly, side airbag sensor assembly RH, side No. 2 airbag sensor assembly RH and door side airbag sensor RH. Also check that the connectors that link the No. 2 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 airbag sensor assembly, side airbag sensor assembly RH, side No. 2 airbag sensor assembly RH and door side airbag sensor RH. Also disconnect the connectors that link the No. 2 floor wire and front door wire RH.

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

NOTICE:
Do not forcibly insert the 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 NO. 2 FLOOR WIRE
OK -- Continue to next step.

4. CHECK NO. 2 FLOOR WIRE (SHORT)

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

Standard Resistance:

Text in Illustration

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 (-) auxiliary battery terminal.

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

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

Standard Voltage:

(d) Turn the power switch off.

(e) Disconnect the cable from the negative (-) auxiliary battery terminal.

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

Text in Illustration

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

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

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

Standard Resistance:

Text in Illustration

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

7. CHECK NO. 2 FLOOR WIRE (OPEN)

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

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

8. CHECK NO. 2 FLOOR WIRE (SHORT)

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

Standard Resistance:

Text in Illustration

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 (-) auxiliary battery terminal.

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

Standard Resistance:

Text in Illustration

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

11. CHECK DOOR SIDE AIRBAG SENSOR RH CIRCUIT (OPEN)

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

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

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

(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.

12. CHECK DOOR SIDE AIRBAG SENSOR RH CIRCUIT (SHORT)

(a) Disconnect the service wire 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.

13. CHECK DOOR SIDE AIRBAG SENSOR RH CIRCUIT (SHORT TO B+)

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

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

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

Standard Voltage:

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

14. CHECK DOOR SIDE AIRBAG SENSOR RH CIRCUIT (SHORT TO GROUND)

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

Standard Resistance:

Text in Illustration

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

15. CHECK SIDE AIRBAG SENSOR ASSEMBLY RH

(a) Connect the connectors to the side No. 2 airbag sensor assembly RH, door side airbag sensor RH and airbag sensor assembly.

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

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

(d) Clear the DTCs stored in memory Built-in Type Yaw Rate Sensor.

(e) Turn the power switch off.

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

(g) Check for DTCs Built-in Type Yaw Rate Sensor.

Result:

HINT
Codes other than DTCs B1642, B1647, 81 and 82 may be output at this time, but they are not related to this check.

(h) Turn the power switch off.

(i) Disconnect the cable from the negative (-) auxiliary battery terminal.

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

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

Text in Illustration

B -- REPLACE SIDE AIRBAG SENSOR ASSEMBLY RH Removal

C -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting
A -- Continue to next step.

16. CHECK SIDE NO. 2 AIRBAG SENSOR ASSEMBLY RH

(a) Interchange the side No. 2 airbag sensor assembly RH with LH and connect the connectors to them.

(b) Connect the cable to the negative (-) auxiliary battery terminal.

(c) Clear the DTCs stored in memory Built-in Type Yaw Rate Sensor.

(d) Turn the power switch off.

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

(f) Check for DTCs Built-in Type Yaw Rate Sensor.

Result:

HINT
Codes other than DTCs B1642, B1647, 81 and 82 may be output at this time, but they are not related to this check.

(g) Turn the power switch off.

(h) Disconnect the cable from the negative (-) auxiliary battery terminal.

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

(i) Return the side No. 2 airbag sensor assembly RH and LH to their original positions and connect the connectors.

Text in Illustration

B -- REPLACE SIDE NO. 2 AIRBAG SENSOR ASSEMBLY RH Removal

C -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting
A -- Continue to next step.

17. CHECK DOOR SIDE AIRBAG SENSOR RH

(a) Interchange the door side airbag sensor RH with LH and connect the connectors.

HINT
Codes other than DTCs B1642, B1647, 81 and 82 may be output at this time, but they are not related to this check.

(g) Turn the power switch off.

(h) Disconnect the cable from the negative (-) auxiliary battery terminal.

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

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

Text in Illustration

B -- REPLACE DOOR SIDE AIRBAG SENSOR RH Removal

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

A -- REPLACE AIRBAG SENSOR ASSEMBLY Removal

18. CHECK HISTORY DTC

(a) Check for history DTCs Built-in Type Yaw Rate Sensor.

Result:

HINT
Codes other than history DTCs B1622 and B1632 may be output at this time, but they are not related to this check.

B -- CHECK SIDE AIRBAG SENSOR ASSEMBLY RH

C -- CHECK SIDE NO. 2 AIRBAG SENSOR ASSEMBLY RH
A -- Continue to next step.

19. CHECK CURRENT DTC

(a) Check for current DTCs Built-in Type Yaw Rate Sensor.

Result:

HINT
Codes other than current DTCs 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.

20. CHECK CONNECTORS

(a) Turn the power switch off.

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

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

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

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

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

22. CHECK NO. 2 FLOOR WIRE (SHORT)

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

Standard Resistance:

Text in Illustration

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 (-) auxiliary battery terminal.

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

Standard Resistance:

Text in Illustration

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

25. CHECK SIDE AIRBAG SENSOR ASSEMBLY RH

(a) Connect the connector to the airbag sensor assembly.

HINT
Codes other than DTCs B1623 and B1628 may be output at this time, but they are not related to this check.

(h) Turn the power switch off.

(i) Disconnect the cable from the negative (-) auxiliary battery terminal.

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

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

Text in Illustration

B -- REPLACE SIDE AIRBAG SENSOR ASSEMBLY RH Removal

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

A -- REPLACE AIRBAG SENSOR ASSEMBLY Removal

26. CHECK CONNECTORS

(a) Turn the power switch off.

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

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

(c) Check that the connectors are properly connected to the side airbag sensor assembly RH and side No. 2 airbag sensor assembly 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 assembly RH and side No. 2 airbag sensor assembly RH.

(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.