Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Distance Control Switch Circuit

DESCRIPTION

The vehicle-to-vehicle distance control switch is used to set the distance for vehicle-to-vehicle distance control mode. The vehicle-to-vehicle distance control switch is installed in the steering pad switch assembly. The vehicle-to-vehicle distance set value can be changed by operating the vehicle-to-vehicle distance control switch while the dynamic radar cruise control system is controlling vehicle speed in vehicle-to-vehicle distance control mode.

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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• When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored.

PROCEDURE

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Radar Cruise 2 / Data List.

(e) Read the Data List according to the display on the Techstream.

OK:

When the vehicle-to-vehicle distance control switch is operated, the display changes as shown above.

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

(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:

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

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

OK

REPLACE DRIVING SUPPORT ECU ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR