Airbag System

SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: B1630/23,B1635/24: Rear Airbag Sensor RH Circuit Malfunction
B1635/24 - Rear Airbag Sensor LH Circuit Malfunction

DESCRIPTION

* The rear airbag sensor consists of the safing sensor, diagnostic circuit, lateral deceleration sensor, etc.

* If the center airbag sensor receives signals from the lateral deceleration sensor, it determines whether the SRS should be activated.

* DTC B1630 or B1635 is stored when a malfunction is detected in the rear airbag sensor circuit.





WIRING DIAGRAM









INSPECTION PROCEDURE

NOTICE:
* W/ Navigation System:
* After the engine switch is turned off, the display and navigation module display (navigation system) records various types of memory and settings. As a result, after turning the engine switch off, be sure to wait for the time specified in the following table before disconnecting the cable from the negative (-) battery terminal.

Waiting Time before Disconnecting Cable from Negative (-) Battery Terminal:





* When disconnecting the cable from the negative (-) battery terminal while performing repairs, some systems need to be initialized after the cable is reconnected Repair Instruction - Initialization.
PROCEDURE

1. CHECK FOR DTC

(a) Turn the engine switch on (IG).

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

(c) Turn the engine switch off.

(d) Turn the engine switch on (IG), and wait for at least 60 seconds.

(e) Check for DTCs DTC Check / Clear.

Result





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

B -- CHECK REAR AIRBAG SENSOR LH

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

2. CHECK REAR AIRBAG SENSOR RH

(a) Turn the engine switch off.





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

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

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

(e) Turn the engine switch on (IG), and wait for at least 60 seconds.

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

(g) Turn the engine switch off.

(h) Turn the engine switch on (IG), and wait for at least 90 seconds.

(i) Check for DTCs DTC Check / Clear.

Result





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

Text in Illustration





(j) Turn the engine switch off.

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

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

B -- REPLACE REAR AIRBAG SENSOR RH

A -- USE SIMULATION METHOD TO CHECK Diagnosis System

C -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Removal

3. CHECK REAR AIRBAG SENSOR LH

(a) Turn the engine switch off.





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

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

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

(e) Turn the engine switch on (IG), and wait for at least 60 seconds.

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

(g) Turn the engine switch off.

(h) Turn the engine switch on (IG), and wait for at least 90 seconds.

(i) Check for DTCs DTC Check / Clear.

Result





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

Text in Illustration





(j) Turn the engine switch off.

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

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

B -- REPLACE REAR AIRBAG SENSOR LH

A -- USE SIMULATION METHOD TO CHECK Diagnosis System

C -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Removal