B1635

SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1635/24: Rear Airbag Sensor LH Circuit Malfunction

DTC B1635/24 - Rear Airbag Sensor LH Circuit Malfunction

DESCRIPTION
HINT: For this vehicle, side airbag sensor malfunctions are output as rear airbag sensor malfunction codes.

The side airbag sensor LH consists of the safing sensor, the diagnostic circuit, the lateral deceleration sensor, etc.
If the center airbag sensor 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 side airbag sensor LH circuit.






WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC




(a) Turn the ignition switch ON, and wait for at least 60 seconds.
(b) Clear the DTCs stored in memory Reading and Clearing Diagnostic Trouble Codes.
(c) Turn the ignition switch OFF.
(d) Turn the ignition switch ON, and wait for at least 60 seconds.
(e) Check the DTCs Reading and Clearing Diagnostic Trouble Codes.
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.

OK -- USE SIMULATION METHOD TO CHECK
NG -- Continue to next step.
2. CHECK CONNECTION OF CONNECTOR
(a) Turn the ignition 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 and the side airbag sensor LH.
OK:
The connectors are connected.
NG -- CONNECT CONNECTORS
OK -- Continue to next step.
3. CHECK NO. 2 FLOOR WIRE (OPEN)




(a) Disconnect the connectors from the center airbag sensor and the side airbag sensor LH.
(b) Using a service wire, connect terminals A20-20 (VUCL) and A20-22 (ESCL) of connector "B".
NOTE:
Do not forcibly insert a service wire into the terminals of the connector when connecting.
(c) Measure the resistance of the wire harness side connector.
Standard resistance:






NG -- REPAIR OR REPLACE NO. 2 FLOOR WIRE
OK -- Continue to next step.
4. CHECK NO. 2 FLOOR WIRE (SHORT)




(a) Disconnect the service wire from connector "B".
(b) Measure the resistance of the wire harness side connector.
Standard resistance:






NG -- REPAIR OR REPLACE NO. 2 FLOOR WIRE
OK -- Continue to next step.
5. CHECK NO. 2 FLOOR WIRE (SHORT TO B+)




(a) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(b) Turn the ignition switch ON.
(c) Measure the voltage of the wire harness side connector.
Standard voltage:






NG -- REPAIR OR REPLACE NO. 2 FLOOR WIRE
OK -- Continue to next step.
6. CHECK NO. 2 FLOOR WIRE (SHORT TO GROUND)




(a) Turn the ignition switch OFF.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Measure the resistance of the wire harness side connector.
Standard resistance:






NG -- REPAIR OR REPLACE NO. 2 FLOOR WIRE
OK -- Continue to next step.
7. CHECK SIDE AIRBAG SENSOR LH




(a) Connect the connectors to the center airbag sensor.
(b) Interchange the side airbag sensor LH with RH 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 ignition switch ON, and wait for at least 60 seconds.
(e) Clear the DTCs stored in memory Reading and Clearing Diagnostic Trouble Codes.
(f) Turn the ignition switch OFF.
(g) Turn the ignition switch ON, and wait for at least 60 seconds.
(h) Check the DTCs Reading and Clearing Diagnostic Trouble Codes.

Result





B -- REPLACE SIDE AIRBAG SENSOR LH
A -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY
C -- USE SIMULATION METHOD TO CHECK