Supplemental Restraint Systems. Dtc B1635/24 Front Passenger Side Rear Airbag Sensor Circuit Malfunction

Vehicle Interior. Yaris. Ncp93, 131

Supplemental Restraint Systems. Yaris. Ncp93, 131

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK DTC

CHECK CONNECTION OF CONNECTORS

CHECK FLOOR WIRE (FOR OPEN)

CHECK FLOOR WIRE (FOR SHORT)

CHECK FLOOR WIRE (TO B+)

CHECK FLOOR WIRE (TO GROUND)

CHECK REAR AIRBAG SENSOR RH

CHECK SIDE AIRBAG SENSOR RH

DTC B1635/24 Front Passenger Side Rear Airbag Sensor Circuit Malfunction

DESCRIPTION

The rear airbag sensor RH consists of parts including the diagnostic circuit and the lateral deceleration sensor.
When the center airbag sensor assembly receives signals from the lateral deceleration sensor, it determines whether or not the SRS should be activated.
DTC B1635/24 is recorded when a malfunction is detected in the rear airbag sensor RH circuit.

DTC No.	DTC Detecting Condition	Trouble Area
B1635/24	Center airbag sensor assembly detects line short circuit signal, open circuit signal, short circuit to ground signal or short circuit to B+ signal in rear airbag sensor RH circuit for 2 seconds. Rear airbag sensor RH malfunction Center airbag sensor assembly malfunction	Floor wire Rear airbag sensor RH Center airbag sensor assembly

WIRING DIAGRAM

Yaris. Ncp93, 131.Supplemental Restraint Systems.Airbag System (For Sedan).
Dtc
B1635/24 Front Passenger Side Rear Airbag Sensor Circuit Malfunction

INSPECTION PROCEDURE

1.CHECK DTC

Turn the ignition switch on, and wait for at least 60 seconds.

Clear the DTCs stored in the memory (YARIS_NCP93 RM000000XFE0D2X.html).

Turn the ignition switch off.

Turn the ignition switch on, and wait for at least 60 seconds.

Check the DTCs (YARIS_NCP93 RM000000XFE0D2X.html).
OK:
DTC B1635/24 is not output.
HINT:
DTCs other than DTC B1635/24 may be output at this time, but they are not related to this check.

USE SIMULATION METHOD TO CHECK

NG

2.CHECK CONNECTION OF CONNECTORS

Turn the ignition switch off.

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

Check that the connectors are properly connected to the center airbag sensor assembly and the rear airbag sensor RH.
OK:
The connectors are properly connected.

CONNECT CONNECTORS

OK

3.CHECK FLOOR WIRE (FOR OPEN)

Disconnect the connectors from the side airbag sensor RH and the rear airbag sensor RH.

Using a service wire, connect J14-2 (BCR+) and J14-1 (BCR-) of connector C.
NOTICE:
Do not forcibly insert a service wire into the terminals of the connector when connecting.

Measure the resistance.
Standard resistance:
Tester Connection
Condition
Specified Condition
J16-1 (BCR+) - J16-2 (BCR-)
Always
Below 1 Ω

REPAIR OR REPLACE FLOOR WIRE

OK

4.CHECK FLOOR WIRE (FOR SHORT)

Disconnect the service wire from connector C.

Measure the resistance.
Standard resistance:
Tester Connection
Condition
Specified Condition
J16-1 (BCR+) - J16-2 (BCR-)
Always
1 MΩ or higher

REPAIR OR REPLACE FLOOR WIRE

OK

5.CHECK FLOOR WIRE (TO B+)

Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.

Turn the ignition switch on.

Measure the voltage.
Standard voltage:
Tester Connection
Switch Condition
Specified Condition
J16-1 (BCR+) - Body ground
Ignition switch ON
Below 1 V
J16-2 (BCR-) - Body ground
Ignition switch ON
Below 1 V

REPAIR OR REPLACE FLOOR WIRE

OK

6.CHECK FLOOR WIRE (TO GROUND)

Turn the ignition switch off.

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

Measure the resistance.
Standard resistance:
Tester Connection
Condition
Specified Condition
J16-1 (BCR+) - Body ground
Always
1 MΩ or higher
J16-2 (BCR-) - Body ground
Always
1 MΩ or higher

REPAIR OR REPLACE FLOOR WIRE

OK

7.CHECK REAR AIRBAG SENSOR RH

Connect the connectors to the center airbag sensor assembly.

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

Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.

Turn the ignition switch on, and wait for at least 60 seconds.

Clear the DTCs stored in the memory (YARIS_NCP93 RM000000XFE0D2X.html).

Turn the ignition switch off.

Turn the ignition switch on, and wait for at least 60 seconds.

Check the DTCs (YARIS_NCP93 RM000000XFE0D2X.html).
Result:
Result
Proceed to
DTC B1635/24 is output.
A
DTC B1630/23 is output.
B
DTC B1630/23 and B1635/24 are not output.
C

Go to step 8

REPLACE REAR AIRBAG SENSOR RH

USE SIMULATION METHOD TO CHECK

8.CHECK SIDE AIRBAG SENSOR RH

Turn the ignition switch to the lock position.

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

Return the airbag sensor rear LH and airbag sensor rear RH to their original positions and connect the connectors to them.

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

Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.

Turn the ignition switch to the on position, and wait for at least 60 seconds.

Clear the DTCs stored in the memory (YARIS_NCP93 RM000000XFE0D2X.html).

Turn the ignition switch to the lock position.

Turn the ignition switch to the on position, and wait for at least 60 seconds.

Check for DTCs (YARIS_NCP93 RM000000XFE0D2X.html).
Result:
Result
Proceed to
DTC B1635/24 is output.
A
DTC B1630/23 is output.
B
Neither DTC B1630/23 nor B1635/24 is output.
C

REPLACE CENTER AIRBAG SENSOR ASSEMBLY

REPLACE SIDE AIRBAG SENSOR RH

USE SIMULATION METHOD TO CHECK

Tester Connection	Condition	Specified Condition
J16-1 (BCR+) - J16-2 (BCR-)	Always	Below 1 Ω

Tester Connection	Switch Condition	Specified Condition
J16-1 (BCR+) - Body ground	Ignition switch ON	Below 1 V
J16-2 (BCR-) - Body ground	Ignition switch ON	Below 1 V

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