Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Front Airbag Sensor (LH) (B1615)

DESCRIPTION

The front airbag sensor LH circuit consists of the airbag ECU assembly and front airbag sensor LH.

The front airbag sensor LH detects impacts to the vehicle and sends signals to the airbag ECU assembly to determine if the airbags and pretensioners should be deployed.

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

WIRING DIAGRAM

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CAUTION / NOTICE / HINT

NOTICE:

After turning the engine 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.

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PROCEDURE

(a) Turn the engine switch off.

*1 Front Airbag Sensor RH *2 Airbag ECU Assembly

(b) Disconnect the cable from the negative (-) battery terminal.

CAUTION:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(c) Interchange the front airbag sensor LH with RH and connect the connectors.

(d) Connect the cable to the negative (-) battery terminal.

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

(f) Clear the DTCs stored in memory.

(g) Turn the engine switch off.

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

(i) Check for DTCs.

HINT:

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

(j) Turn the engine switch off.

(k) Disconnect the cable from the negative (-) battery terminal.

CAUTION:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

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

A

USE SIMULATION METHOD TO CHECK

B

REPLACE AIRBAG ECU ASSEMBLY

C

REPLACE FRONT AIRBAG SENSOR LH