Toyota 4Runner manuals

Toyota 4Runner: Front Airbag Sensor LH Malfunction (B1615/14)

DESCRIPTION

The front airbag sensor LH consists of the diagnostic circuit and frontal deceleration sensor, etc.

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

DTC B1615/14 is stored when a malfunction is detected in the front airbag sensor LH circuit.

DTC Code

DTC Detection Condition

Trouble Area

B1615/14

Either condition is met:

  • A front airbag sensor LH malfunction.
  • A center airbag sensor malfunction.
  • Front 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 FRONT 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.

(c) Interchange the front airbag sensor RH with LH 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 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 B1615 is output

A

DTC B1610 is output

B

DTC B1610 and B1615 are not output

C

HINT:

Codes other than DTC B1610 and B1615 may be output at this time, but they are not related to this check.

Text in Illustration

*1

Front Airbag Sensor RH

*2

Center Airbag Sensor


C

USE SIMULATION METHOD TO CHECK


A

REPLACE CENTER AIRBAG SENSOR ASSEMBLY


B

REPLACE FRONT AIRBAG SENSOR LH

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DESCRIPTION The center airbag sensor assembly consists of a deceleration sensor, safing sensor, drive circuit, diagnosis circuit, ignition control, etc. If the center airbag sensor assembly receiv ...

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