Toyota 4Runner: Door Side Airbag Sensor RH Malfunction (B1690/15,B1695/16)

Toyota 4Runner Service Manual / Vehicle Interior / Supplemental Restraint Systems / Airbag System / Door Side Airbag Sensor RH Malfunction (B1690/15,B1695/16)

DESCRIPTION

The side airbag sensor LH or RH 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 B1690/15 or B1695/16 is stored when a malfunction is detected in the side airbag sensor LH or RH circuit.

DTC Code	DTC Detection Condition	Trouble Area
B1690/15	Either condition is met: A side airbag sensor RH malfunction. A center airbag sensor malfunction.	Side airbag sensor assembly RH Center airbag sensor assembly
B1695/16	Either condition is met: A side airbag sensor LH malfunction. A center airbag sensor malfunction.	Side airbag sensor assembly 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 B1690 and B1695 are not output	A
DTC B1695 is output	B
DTC B1690 is output	C

USE SIMULATION METHOD TO CHECK

GO TO STEP 3

2.	CHECK SIDE 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 60 seconds.

(i) Check for DTCs (See page ).

Result

Result	Proceed to
DTC B1690 and B1695 are not output	A
DTC B1695 is output	B
DTC B1690 is output	C

HINT:

Codes other than DTC B1690 and B1695 may be output at this time, but they are not related to this check.

Text in Illustration

*1	Side Airbag Sensor LH
*2	Rear Airbag Sensor RH

(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 side airbag sensor RH and LH to their original positions and connect the connectors to them.

REPLACE CENTER AIRBAG SENSOR ASSEMBLY

USE SIMULATION METHOD TO CHECK

REPLACE SIDE AIRBAG SENSOR RH

3.	CHECK SIDE 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 60 seconds.

(i) Check for DTCs (See page ).

Result

Result	Proceed to
DTC B1690 and B1695 are not output	A
DTC B1690 is output	B
DTC B1695 is output	C

HINT:

Codes other than DTC B1690 and B1695 may be output at this time, but they are not related to this check.

Text in Illustration

*1	Side Airbag Sensor RH
*2	Rear Airbag Sensor LH

(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 side airbag sensor RH and LH to their original positions and connect the connectors to them.

REPLACE CENTER AIRBAG SENSOR ASSEMBLY

USE SIMULATION METHOD TO CHECK

REPLACE SIDE AIRBAG SENSOR LH

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