Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: 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 back sonar or clearance sonar switch assembly 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

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuse 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 ignition switch to ON.

(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

Back sonar or clearance sonar switch assembly/OFF or ON

OFF: Back sonar or clearance sonar switch assembly off

ON: Back sonar or clearance sonar switch assembly on

-

Intuitive P/A ECU Type

Type of intuitive P/A ECU/Normal

Normal: Normal clearance sonar type

-

Result

Result

Proceed to

Both of the following conditions are met:

  • The display changes as shown above when the back sonar or clearance sonar switch assembly 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 back sonar or clearance sonar switch assembly 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

Switch Condition

Specified Condition

6 (IG) - 3 (ECU)

Back sonar or clearance sonar switch assembly on

Below 1 Ω

6 (IG) - 3 (ECU)

Back sonar or clearance sonar switch assembly 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

B14-6 (IG) - Body ground

Ignition switch ON

11 to 14 V

B14-6 (IG) - Body ground

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

C30-9 (CLSW) - B14-3 (ECU)

Always

Below 1 Ω

C30-9 (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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