B1635

SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: B1635/24; Rear Airbag Sensor LH Circuit Malfunction; 2013 MY Corolla [07/2012 -]
B1635/24 - Rear Airbag Sensor LH Circuit Malfunction

DESCRIPTION

The rear airbag sensor LH circuit consists of the center airbag sensor assembly, side airbag sensor LH, door side airbag sensor LH* and rear airbag sensor LH.

The side airbag sensor LH, door 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 airbags should be deployed.

DTC B1635/24 is recorded when a malfunction is detected in the rear airbag sensor LH circuit.

*: w/ Daytime Running Light

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK VEHICLE CONDITION

(a) Check vehicle condition.

Result:

B -- CHECK CONNECTORS
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 side airbag sensor LH, door side airbag sensor LH and rear airbag sensor LH. Also check that the connectors that link the 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 side airbag sensor LH, door side airbag sensor LH and rear airbag sensor LH. Also disconnect the connectors that link the 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 FLOOR WIRE (OPEN)

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

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:

(c) Disconnect SST from connector C.

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

4. CHECK FLOOR WIRE (SHORT)

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

Standard Resistance:

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

5. CHECK FLOOR WIRE (SHORT TO B+)

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

(b) Turn the ignition switch to ON.

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

Standard Voltage:

(d) Turn the ignition switch off.

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

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

6. CHECK FLOOR WIRE (SHORT TO GROUND)

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

Standard Resistance:

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

7. CHECK WIRE HARNESS (OPEN)

(a) Connect the connectors that link the 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.

8. 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.

9. CHECK WIRE HARNESS (SHORT TO B+)

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

(b) Turn the ignition switch to ON.

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

Standard Voltage:

(d) Turn the ignition switch off.

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

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

10. CHECK WIRE HARNESS (SHORT TO GROUND)

(a) 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.

11. CHECK REAR AIRBAG SENSOR LH

(a) Connect the connectors to the side airbag sensor LH and door side airbag sensor LH.

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

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

(d) Turn the ignition switch to ON, and wait for at least 60 seconds.

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

(f) Turn the ignition switch off.

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

(h) Check for DTCs DTC Check / Clear.

Result:

HINT
Codes other than DTCs B1630/23 and B1635/24 may be output at this time, but they are not related to this check.

(i) Turn the ignition switch off.

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

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

B -- REPLACE REAR AIRBAG SENSOR LH Removal

C -- USE SIMULATION METHOD TO CHECK Diagnosis System
A -- Continue to next step.

12. CHECK SIDE AIRBAG SENSOR LH

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

HINT
Codes other than DTCs B1630/23 and B1635/24 may be output at this time, but they are not related to this check.

(h) Turn the ignition switch off.

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

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

B -- REPLACE SIDE AIRBAG SENSOR LH Removal

C -- USE SIMULATION METHOD TO CHECK Diagnosis System
A -- Continue to next step.

13. CHECK DOOR SIDE AIRBAG SENSOR LH

(a) Disconnect the connector from the door side airbag sensor LH.

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

(c) Turn the ignition switch to ON, and wait for at least 60 seconds.

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

(e) Turn the ignition switch off.

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

(g) Check for DTCs DTC Check / Clear.

OK:

DTC B1635/24 is not output.

HINT
Codes other than DTC B1635/24 may be output at this time, but they are not related to this check.

NG -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Removal

OK -- REPLACE DOOR SIDE AIRBAG SENSOR LH Removal

14. CHECK FRONT DOOR WIRE LH (OPEN)

(a) Disconnect the front door wire LH connector from the floor wire.

HINT
SST has already been inserted into connector E.

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

Standard Resistance:

(c) Disconnect SST from connector E.

NG -- REPLACE FRONT DOOR WIRE LH

OK -- REPLACE FLOOR WIRE

15. CHECK FRONT DOOR WIRE LH (SHORT)

(a) Disconnect the front door wire LH connector from the floor wire.

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

Standard Resistance:

NG -- REPLACE FRONT DOOR WIRE LH

OK -- REPLACE FLOOR WIRE

16. CHECK FRONT DOOR WIRE LH (SHORT TO B+)

(a) Disconnect the front door wire LH connector from the floor wire.

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

(c) Turn the ignition switch to ON.

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

Standard Voltage:

NG -- REPLACE FRONT DOOR WIRE LH

OK -- REPLACE FLOOR WIRE

17. CHECK FRONT DOOR WIRE LH (SHORT TO GROUND)

(a) Disconnect the front door wire LH connector from the floor wire.

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

Standard Resistance:

NG -- REPLACE FRONT DOOR WIRE LH

OK -- REPLACE FLOOR WIRE

18. 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 side airbag sensor LH and the 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 side airbag sensor LH 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 FLOOR WIRE
OK -- Continue to next step.

19. CHECK FLOOR WIRE (OPEN)

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

(c) Disconnect SST from connector C.

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

20. CHECK FLOOR WIRE (SHORT TO B+)

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

(b) Turn the ignition switch to ON.

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

Standard Voltage:

(d) Turn the ignition switch off.

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

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

21. CHECK FLOOR WIRE (SHORT TO GROUND)

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

Standard Resistance:

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

22. CHECK REAR AIRBAG SENSOR LH

(a) Connect the connector to the side airbag sensor LH.

HINT
Codes other than DTCs B1630/23 and B1635/24 may be output at this time, but they are not related to this check.

(i) Turn the ignition switch off.

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

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

B -- REPLACE REAR AIRBAG SENSOR LH Removal

C -- USE SIMULATION METHOD TO CHECK Diagnosis System
A -- Continue to next step.

23. CHECK SIDE AIRBAG SENSOR LH

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

HINT
Codes other than DTCs B1630/23 and B1635/24 may be output at this time, but they are not related to this check.

(h) Turn the ignition switch off.

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

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

B -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Removal

C -- REPLACE SIDE AIRBAG SENSOR LH Removal

A -- USE SIMULATION METHOD TO CHECK Diagnosis System