Toyota Avalon Service & Repair Manual: Distance Control Switch Circuit

Toyota Avalon Service & Repair Manual / Engine / Cruise Control / Dynamic Radar Cruise Control System(for Hv Model) / 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.

    Click here

  • 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

1.

READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the power 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.

Powertrain > Radar Cruise2 > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Distance Control Switch

Distance control switch signal

ON or OFF

ON: Distance control switch on

OFF: Distance control switch off

-
Powertrain > Radar Cruise2 > Data List

Tester Display

Distance Control Switch

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

2.

INSPECT STEERING PAD SWITCH ASSEMBLY

(a) Remove the steering pad switch assembly.

Click here

(b) Inspect the steering pad switch assembly.

Click here

NG

REPLACE STEERING PAD SWITCH ASSEMBLY

OK

3.

INSPECT SPIRAL CABLE SUB-ASSEMBLY

(a) Remove the spiral cable sub-assembly.

Click here

(b) Inspect the spiral cable sub-assembly.

Click here

NG

REPLACE SPIRAL CABLE SUB-ASSEMBLY

OK

4.

CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - DRIVING SUPPORT ECU ASSEMBLY AND BODY GROUND)

(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:

Tester Connection

Condition

Specified Condition

G17-6 (DIST) - G39-23 (SPSW)

Always

Below 1 Ω

G17-2 (ECC) - Body ground

Always

Below 1 Ω

G17-6 (DIST) or G39-23 (SPSW) - Body ground

Always

10 kΩ or higher

(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
    Diagnostic Trouble Code Chart

    Dtc Check / Clear

    See More:

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