Dtc B1635/24 Rear Airbag Sensor Lh Circuit Malfunction

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK VEHICLE CONDITION

CHECK CONNECTORS

CHECK FLOOR WIRE (OPEN)

CHECK FLOOR WIRE (SHORT)

CHECK FLOOR WIRE (SHORT TO B+)

CHECK FLOOR WIRE (SHORT TO GROUND)

CHECK WIRE HARNESS (OPEN)

CHECK WIRE HARNESS (SHORT)

CHECK WIRE HARNESS (SHORT TO B+)

CHECK WIRE HARNESS (SHORT TO GROUND)

CHECK REAR AIRBAG SENSOR LH

CHECK SIDE AIRBAG SENSOR LH

CHECK DOOR SIDE AIRBAG SENSOR LH

CHECK FRONT DOOR WIRE LH (OPEN)

CHECK FRONT DOOR WIRE LH (SHORT)

CHECK FRONT DOOR WIRE LH (SHORT TO B+)

CHECK FRONT DOOR WIRE LH (SHORT TO GROUND)

CHECK CONNECTORS

CHECK FLOOR WIRE (OPEN)

CHECK FLOOR WIRE (SHORT TO B+)

CHECK FLOOR WIRE (SHORT TO GROUND)

CHECK REAR AIRBAG SENSOR LH

CHECK SIDE AIRBAG SENSOR LH

DTC 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.

DTC No.	DTC Detection Condition	Trouble Area
B1635/24	The center airbag sensor assembly receives a short circuit signal, an open circuit signal, a short circuit to ground or a short circuit to B+ signal in the rear airbag sensor LH circuit for 2 seconds. Side airbag sensor LH malfunction Door side airbag sensor LH malfunction* Rear airbag sensor LH malfunction Center airbag sensor assembly malfunction	Floor wire Front door wire LH* Side airbag sensor LH Door side airbag sensor LH* Rear airbag sensor LH Center airbag sensor assembly

*: w/ Daytime Running Light

WIRING DIAGRAM

INSPECTION PROCEDURE

1.CHECK VEHICLE CONDITION

1. Check vehicle condition.
   

   Result:

   Result	Proceed to
   w/ Daytime Running Light	A
   w/o Daytime Running Light	B

B	Go to step 18

A

2.CHECK CONNECTORS

1. Turn the ignition switch off.
   

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

3. 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.

4. 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.
   

5. Check that the terminals of the connectors are not damaged.
   

   OK:

   The terminals are not deformed or damaged.
   

NG	REPLACE WIRE HARNESS

OK

3.CHECK FLOOR WIRE (OPEN)

1. 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

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   L12-1 (BCL+) - L12-2 (BCL-)	Always	Below 1 Ω

3. Disconnect SST from connector C.
   

NG	REPLACE FLOOR WIRE

OK

4.CHECK FLOOR WIRE (SHORT)

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   L12-1 (BCL+) - L12-2 (BCL-)	Always	1 MΩ or higher

NG	REPLACE FLOOR WIRE

OK

5.CHECK FLOOR WIRE (SHORT TO B+)

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

2. Turn the ignition switch to ON.
   

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

   Standard Voltage:

   Tester Connection	Switch Condition	Specified Condition
   L12-1 (BCL+) - Body ground	Ignition switch ON	Below 1 V
   L12-2 (BCL-) - Body ground	Ignition switch ON	Below 1 V

4. Turn the ignition switch off.
   

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

NG	REPLACE FLOOR WIRE

OK

6.CHECK FLOOR WIRE (SHORT TO GROUND)

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   L12-1 (BCL+) - Body ground	Always	1 MΩ or higher
   L12-2 (BCL-) - Body ground	Always	1 MΩ or higher

NG	REPLACE FLOOR WIRE

OK

7.CHECK WIRE HARNESS (OPEN)

1. Connect the connectors that link the floor wire and front door wire LH.
   

   
   
   
   

2. 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

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   L59-1 (BDL+) - L59-2 (BDL-)	Always	Below 1 Ω

NG	Go to step 14

OK

8.CHECK WIRE HARNESS (SHORT)

1. Disconnect SST from connector E.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   L59-1 (BDL+) - L59-2 (BDL-)	Always	1 MΩ or higher

NG	Go to step 15

OK

9.CHECK WIRE HARNESS (SHORT TO B+)

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

2. Turn the ignition switch to ON.
   

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

   Standard Voltage:

   Tester Connection	Switch Condition	Specified Condition
   L59-1 (BDL+) - Body ground	Ignition switch ON	Below 1 V
   L59-2 (BDL-) - Body ground	Ignition switch ON	Below 1 V

4. Turn the ignition switch off.
   

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

NG	Go to step 16

OK

10.CHECK WIRE HARNESS (SHORT TO GROUND)

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   L59-1 (BDL+) - Body ground	Always	1 MΩ or higher
   L59-2 (BDL-) - Body ground	Always	1 MΩ or higher

NG	Go to step 17

OK

11.CHECK REAR AIRBAG SENSOR LH

1. Connect the connectors to the side airbag sensor LH and door side airbag sensor LH.
   

2. Interchange the rear airbag sensor LH with RH and connect the connectors.
   

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

4. Turn the ignition switch to ON, and wait for at least 60 seconds.
   

5. Clear the DTCs stored in the memory (COROLLA_ZRE142 RM000000XFE0H1X.html).
   

6. Turn the ignition switch off.
   

7. Turn the ignition switch to ON, and wait for at least 60 seconds.
   

8. Check for DTCs (COROLLA_ZRE142 RM000000XFE0H1X.html).
   

   Result:

   Result	Proceed to
   DTC B1635/24 is output.	A
   DTC B1630/23 is output.	B
   DTCs B1630/23 and B1635/24 are not output.	C

   HINT:

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

9. Turn the ignition switch off.
   

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

11. Return the rear airbag sensors LH and RH to their original positions and connect the connectors.
    

B	REPLACE REAR AIRBAG SENSOR LH (COROLLA_ZRE142 RM000000UWR08QX.html)
C	USE SIMULATION METHOD TO CHECK (COROLLA_ZRE142 RM000000XFD0GSX.html)

A

12.CHECK SIDE AIRBAG SENSOR LH

1. Interchange the side airbag sensor LH with RH and connect the connectors.
   

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

3. Turn the ignition switch to ON, and wait for at least 60 seconds.
   

4. Clear the DTCs stored in the memory (COROLLA_ZRE142 RM000000XFE0H1X.html).
   

5. Turn the ignition switch off.
   

6. Turn the ignition switch to ON, and wait for at least 60 seconds.
   

7. Check for DTCs (COROLLA_ZRE142 RM000000XFE0H1X.html).
   

   Result:

   Result	Proceed to
   DTC B1635/24 is output.	A
   DTC B1630/23 is output.	B
   DTCs B1630/23 and B1635/24 are not output.	C

   HINT:

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

8. Turn the ignition switch off.
   

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

10. Return the side airbag sensors LH and RH to their original positions and connect the connectors.
    

B	REPLACE SIDE AIRBAG SENSOR LH (COROLLA_ZRE142 RM000000UWN09NX.html)
C	USE SIMULATION METHOD TO CHECK (COROLLA_ZRE142 RM000000XFD0GSX.html)

A

13.CHECK DOOR SIDE AIRBAG SENSOR LH

1. Disconnect the connector from the door side airbag sensor LH.
   

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

3. Turn the ignition switch to ON, and wait for at least 60 seconds.
   

4. Clear the DTCs stored in the memory (COROLLA_ZRE142 RM000000XFE0H1X.html).
   

5. Turn the ignition switch off.
   

6. Turn the ignition switch to ON, and wait for at least 60 seconds.
   

7. Check for DTCs (COROLLA_ZRE142 RM000000XFE0H1X.html).
   

   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 (COROLLA_ZRE142 RM000000UWV074X.html)

OK
REPLACE DOOR SIDE AIRBAG SENSOR LH (COROLLA_ZRE142 RM000000UWN09RX.html)

14.CHECK FRONT DOOR WIRE LH (OPEN)

1. Disconnect the front door wire LH connector from the floor wire.
   

   
   
   
   

   HINT:

   SST has already been inserted into connector E.

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   IL1-1 (BDL+) - IL1-2 (BDL-)	Always	Below 1 Ω

3. Disconnect SST from connector E.
   

NG	REPLACE FRONT DOOR WIRE LH

OK
REPLACE FLOOR WIRE

15.CHECK FRONT DOOR WIRE LH (SHORT)

1. Disconnect the front door wire LH connector from the floor wire.
   

   
   
   
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   IL1-1 (BDL+) - IL1-2 (BDL-)	Always	1 MΩ or higher

NG	REPLACE FRONT DOOR WIRE LH

OK
REPLACE FLOOR WIRE

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

1. Disconnect the front door wire LH connector from the floor wire.
   

   
   
   
   

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

3. Turn the ignition switch to ON.
   

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

   Standard Voltage:

   Tester Connection	Switch Condition	Specified Condition
   IL1-1 (BDL+) - Body ground	Ignition switch ON	Below 1 V
   IL1-2 (BDL-) - Body ground	Ignition switch ON	Below 1 V

NG	REPLACE FRONT DOOR WIRE LH

OK
REPLACE FLOOR WIRE

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

1. Disconnect the front door wire LH connector from the floor wire.
   

   
   
   
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   IL1-1 (BDL+) - Body ground	Always	1 MΩ or higher
   IL1-2 (BDL-) - Body ground	Always	1 MΩ or higher

NG	REPLACE FRONT DOOR WIRE LH

OK
REPLACE FLOOR WIRE

18.CHECK CONNECTORS

1. Turn the ignition switch off.
   

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

3. 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.

4. Disconnect the connectors from the side airbag sensor LH and rear airbag sensor LH.
   

5. Check that the terminals of the connectors are not damaged.
   

   OK:

   The terminals are not deformed or damaged.
   

NG	REPLACE FLOOR WIRE

OK

19.CHECK FLOOR WIRE (OPEN)

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

   
   
   
   

   NOTICE:

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

SST

09843-18040

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   L12-1 (BCL+) - L12-2 (BCL-)	Always	Below 1 Ω

3. Disconnect SST from connector C.
   

NG	REPLACE FLOOR WIRE

OK

20.CHECK FLOOR WIRE (SHORT TO B+)

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

2. Turn the ignition switch to ON.
   

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

   Standard Voltage:

   Tester Connection	Switch Condition	Specified Condition
   L12-1 (BCL+) - Body ground	Ignition switch ON	Below 1 V
   L12-2 (BCL-) - Body ground	Ignition switch ON	Below 1 V

4. Turn the ignition switch off.
   

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

NG	REPLACE FLOOR WIRE

OK

21.CHECK FLOOR WIRE (SHORT TO GROUND)

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   L12-1 (BCL+) - Body ground	Always	1 MΩ or higher
   L12-2 (BCL-) - Body ground	Always	1 MΩ or higher

NG	REPLACE FLOOR WIRE

OK

22.CHECK REAR AIRBAG SENSOR LH

1. Connect the connector to the side airbag sensor LH.
   

2. Interchange the rear airbag sensor LH with RH and connect the connectors.
   

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

4. Turn the ignition switch to ON, and wait for at least 60 seconds.
   

5. Clear the DTCs stored in the memory (COROLLA_ZRE142 RM000000XFE0H1X.html).
   

6. Turn the ignition switch off.
   

7. Turn the ignition switch to ON, and wait for at least 60 seconds.
   

8. Check for DTCs (COROLLA_ZRE142 RM000000XFE0H1X.html).
   

   Result:

   Result	Proceed to
   DTC B1635/24 is output.	A
   DTC B1630/23 is output.	B
   DTCs B1630/23 and B1635/24 are not output.	C

   HINT:

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

9. Turn the ignition switch off.
   

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

11. Return the rear airbag sensors LH and RH to their original positions and connect the connectors.
    

B	REPLACE REAR AIRBAG SENSOR LH (COROLLA_ZRE142 RM000000UWR08QX.html)
C	USE SIMULATION METHOD TO CHECK (COROLLA_ZRE142 RM000000XFD0GSX.html)

A

23.CHECK SIDE AIRBAG SENSOR LH

1. Interchange the side airbag sensor LH with RH and connect the connectors.
   

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

3. Turn the ignition switch to ON, and wait for at least 60 seconds.
   

4. Clear the DTCs stored in the memory (COROLLA_ZRE142 RM000000XFE0H1X.html).
   

5. Turn the ignition switch off.
   

6. Turn the ignition switch to ON, and wait for at least 60 seconds.
   

7. Check for DTCs (COROLLA_ZRE142 RM000000XFE0H1X.html).
   

   Result:

   Result	Proceed to
   DTCs B1630/23 and B1635/24 are not output.	A
   DTC B1635/24 is output.	B
   DTC B1630/23 is output.	C

   HINT:

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

8. Turn the ignition switch off.
   

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

10. Return the side airbag sensors LH and RH to their original positions and connect the connectors.
    

B	REPLACE CENTER AIRBAG SENSOR ASSEMBLY (COROLLA_ZRE142 RM000000UWV074X.html)
C	REPLACE SIDE AIRBAG SENSOR LH (COROLLA_ZRE142 RM000000UWN09NX.html)

A
USE SIMULATION METHOD TO CHECK (COROLLA_ZRE142 RM000000XFD0GSX.html)