Toyota Tundra Service Manual: Front Airbag Sensor (LH) (B1615)

DESCRIPTION

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

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

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

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Warning Indicate

Test Mode / Check Mode

B1615

Front Airbag Sensor (LH)

Either condition is met:

  • A front airbag sensor LH malfunction.
  • An airbag sensor assembly malfunction.
  • Front airbag sensor LH
  • Airbag sensor assembly

Comes on

Not applicable

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

    Click here

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

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PROCEDURE

1.

CHECK FRONT AIRBAG SENSOR LH

(a) Turn the ignition switch off.

*1

Front Airbag Sensor RH

*2

Airbag Sensor Assembly

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

(c) Interchange the front 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 ignition switch to ON, and wait for at least 60 seconds.

(f) Clear the DTCs stored in memory.

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(g) Turn the ignition switch off.

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

(i) Check for DTCs.

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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.

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

A

REPLACE AIRBAG SENSOR ASSEMBLY

B

REPLACE FRONT AIRBAG SENSOR LH

C

USE SIMULATION METHOD TO CHECK

    Front Airbag Sensor Lost Communication (RH) (B1612,B1613)

    Front Airbag Sensor Lost Communication (LH) (B1617,B1618)

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