Toyota 4Runner: Rear Airbag Sensor RH Circuit Malfunction (B1630/23,B1635/24)

Toyota 4Runner Service Manual / Vehicle Interior / Supplemental Restraint Systems / Airbag System / Rear Airbag Sensor RH Circuit Malfunction (B1630/23,B1635/24)

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.

DTC Code	DTC Detection Condition	Trouble Area
B1630/23	Either condition is met: A rear airbag sensor RH malfunction. A center airbag sensor malfunction.	Rear airbag sensor RH Center airbag sensor assembly
B1635/24	Either condition is met: A rear airbag sensor LH malfunction. A center airbag sensor malfunction.	Rear airbag sensor LH Center airbag sensor assembly

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

When disconnecting the cable from the negative (-) battery terminal while performing repairs, some systems need to be initialized after the cable is reconnected (See page ).

PROCEDURE

1.	CHECK FOR DTC

(a) Turn the ignition switch to ON.

(b) Clear the DTCs stored in memory (See page
).

(d) Turn the ignition switch to ON, and wait for at least 60 seconds.

(e) Check for DTCs (See page ).

Result

Result	Proceed to
DTC B1630 and B1635 are not output	A
DTC B1635 is output	B
DTC B1630 is output	C

HINT:

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

USE SIMULATION METHOD TO CHECK

GO TO STEP 3

2.	CHECK REAR AIRBAG SENSOR RH

(a) Turn the ignition switch off.

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

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

(e) Turn the ignition switch to ON, and wait for at least 60 seconds.

(f) Clear the DTCs stored in memory (See page
).

(g) Turn the ignition switch off.

(h) Turn the ignition switch to ON, and wait for at least 90 seconds.

(i) Check for DTCs (See page ).

Result

Result	Proceed to
DTC B1630 and B1635 are not output	A
DTC B1635 is output	B
DTC B1630 is output	C

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

*1	Rear Airbag Sensor LH
*2	Center Airbag Sensor

(j) Turn the ignition 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.

REPLACE CENTER AIRBAG SENSOR ASSEMBLY

USE SIMULATION METHOD TO CHECK

REPLACE REAR AIRBAG SENSOR RH

3.	CHECK REAR AIRBAG SENSOR LH

(a) Turn the ignition switch off.

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

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

(e) Turn the ignition switch to ON, and wait for at least 60 seconds.

(f) Clear the DTCs stored in memory (See page
).

(g) Turn the ignition switch off.

(h) Turn the ignition switch to ON, and wait for at least 90 seconds.

(i) Check for DTCs (See page ).

Result

Result	Proceed to
DTC B1630 and B1635 are not output	A
DTC B1630 is output	B
DTC B1635 is output	C

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

*1	Rear Airbag Sensor RH
*2	Center Airbag Sensor

(j) Turn the ignition 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.

REPLACE CENTER AIRBAG SENSOR ASSEMBLY

USE SIMULATION METHOD TO CHECK

REPLACE REAR AIRBAG SENSOR LH

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