Toyota Venza manuals

Toyota Venza: Clearance Sonar Main Switch Circuit

DESCRIPTION

The back sonar or clearance sonar switch assembly is installed at the base of the driver side of the instrument panel.

When the clearance sonar main switch is turned on, an on signal is sent to the clearance warning ECU assembly. The intuitive parking assist system operates according to this signal.

WIRING DIAGRAM


CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1.

READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Intuitive P/A / Data List.

(e) According to the display on the Techstream, read the Data List.

Intuitive P/A

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Main Switch

Clearance sonar main switch/OFF or ON

OFF: Clearance sonar main switch off

ON: Clearance sonar main switch on

-

Clearance Sonar ECU Type

Type of clearance sonar ECU/Normal

Normal: Normal clearance sonar type

-

Result

Proceed to

Both of the following conditions are met:

  • The display changes as shown above when the clearance sonar main switch is operated.
  • "Normal" is displayed.

A

"Normal" is not displayed.

B

Both of the following conditions are met:

  • The display does not change as shown above when the clearance sonar main switch is operated.
  • "Normal" is displayed.

C


A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE


B

REPLACE CLEARANCE WARNING ECU ASSEMBLY


C

2.

INSPECT BACK SONAR OR CLEARANCE SONAR SWITCH ASSEMBLY

(a) Remove the back sonar or clearance sonar switch assembly (See page ).


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

Standard Resistance:

Tester Connection

Condition

Specified Condition

6 (IG) - 3 (ECU)

Clearance sonar main switch on

Below 1 Ω

6 (IG) - 3 (ECU)

Clearance sonar main switch off

10 kΩ or higher

Text in Illustration

*a

Component without harness connected

(Back Sonar or Clearance Sonar Switch Assembly)



NG

REPLACE BACK SONAR OR CLEARANCE SONAR SWITCH ASSEMBLY


OK

3.

CHECK HARNESS AND CONNECTOR (BACK SONAR OR CLEARANCE SONAR SWITCH ASSEMBLY POWER SOURCE)

(a) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

D78-6 (IG) - Body ground

Engine switch on (IG)

11 to 14 V

D78-6 (IG) - Body ground

Engine switch off

Below 1 V


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

4.

CHECK HARNESS AND CONNECTOR (BACK SONAR OR CLEARANCE SONAR SWITCH ASSEMBLY - CLEARANCE WARNING ECU ASSEMBLY)

(a) Disconnect the D79 clearance warning ECU assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D79-9 (CLSW) - D78-3 (ECU)

Always

Below 1 Ω

D79-9 (CLSW) - Body ground

Always

10 kΩ or higher


OK

REPLACE CLEARANCE WARNING ECU ASSEMBLY


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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