Front Passenger Side Rear Airbag Sensor Circuit Malfunction - Airbag System

SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1635/24: Front Passenger Side Rear Airbag Sensor Circuit Malfunction

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

DESCRIPTION
- The rear airbag sensor RH 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 rear airbag sensor RH circuit.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK FOR DTC




(a) Turn the ignition switch to the ON position, and wait for at least 60 seconds.
(b) Clear the DTCs stored in memory DTC Check / Clear.
(c) Turn the ignition switch to the LOCK position.
(d) Turn the ignition switch to the ON position, and wait for at least 60 seconds.
(e) Check for DTCs DTC Check / Clear.
OK:
DTC B1635/24 is not output.
HINT: Codes other than code B1635/24 may be output at this time, but they are not related to this check.

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




(a) Disconnect the connector from the center airbag sensor.
(b) Disconnect the connector from the horn button.
(c) Disconnect the connector from the front passenger airbag.
(d) Disconnect the connector from the No. 1 instrument panel airbag lower.
(e) Disconnect the connector from the front seat airbag LH.
(f) Disconnect the connector from the front seat airbag RH.
(g) Disconnect the connector from the curtain shield airbag LH.
(h) Disconnect the connector from the curtain shield airbag RH.
(i) Disconnect the connector from the front seat outer belt LH.
(j) Disconnect the connector from the front seat outer belt RH.
(k) Using SST, connect A19-2 and A19-1 of connector "C".
SST: 09843-18040
(l) Measure the resistance according to the value(s) in the table below.
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 SST from connector "C".
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:





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




(a) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(b) Turn the ignition switch to the ON position.
(c) Measure the voltage according to the value(s) in the table below.
Standard voltage:





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




(a) Turn the ignition switch to the LOCK position.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:





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




(a) Connect the connectors to the center airbag sensor.
(b) Interchange the rear 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 to the ON position, and wait for at least 60 seconds.
(e) Clear the DTCs stored in memory DTC Check / Clear.
(f) Turn the ignition switch to the LOCK position.
(g) Turn the ignition switch to the ON position, and wait for at least 60 seconds.
(h) Check the DTCs DTC Check / Clear.

Result





B -- REPLACE REAR AIRBAG SENSOR RH
A -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY
C -- USE SIMULATION METHOD TO CHECK