Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Steering Pad Switch Circuit

DESCRIPTION

The driving support ECU assembly receives a lane departure alert switch signal from the steering pad switch assembly and sends the signal to the forward recognition camera via CAN communication.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

The vehicle is equipped with a Supplemental Restraint System (SRS) which includes components such as airbags. Before servicing (including removal or installation of parts), be sure to read the precaution for Supplemental Restraint System.

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PROCEDURE

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: System Select / Can Bus Check.

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B

GO TO CAN COMMUNICATION SYSTEM

A

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: System Select / Health Check.

(e) Check DTCs.

(f) Turn the power switch off.

B

GO TO DTC CHART

A

(a) Remove the steering pad switch assembly.

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(b) Inspect the steering pad switch assembly.

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NG

REPLACE STEERING PAD SWITCH ASSEMBLY

OK

(a) Remove the spiral cable sub-assembly.

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(b) Inspect the spiral cable sub-assembly.

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NG

REPLACE SPIRAL CABLE SUB-ASSEMBLY

OK

(a) Disconnect the G17 spiral cable sub-assembly connector.

(b) Disconnect the G39 driving support ECU assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance (Check for Open):

Standard Resistance (Check for Short):

(d) Connect the G39 driving support ECU assembly connector.

(e) Connect the G17 spiral cable sub-assembly connector.

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR