Toyota 4Runner manuals

Toyota 4Runner: Clearance Sonar Main Switch Circuit

DESCRIPTION

When the back sonar or clearance sonar switch assembly turns on, the on signal is input into the clearance warning ECU assembly.

WIRING DIAGRAM


CAUTION / NOTICE / HINT

NOTICE:

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

PROCEDURE

1.

INSPECT BACK SONAR OR CLEARANCE SONAR SWITCH ASSEMBLY

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


(b) Inspect the back sonar or clearance sonar switch assembly (See page ).



NG

REPLACE BACK SONAR OR CLEARANCE SONAR SWITCH ASSEMBLY


OK

2.

CHECK HARNESS AND CONNECTOR (BACK SONAR OR CLEARANCE SONAR SWITCH ASSEMBLY - BATTERY AND BODY GROUND)

(a) Disconnect the F6 back sonar or clearance sonar switch assembly connector.


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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

F6-6 (IG) - Body ground

Ignition switch ON

11 to 14 V

Ignition switch off

Below 1 V

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

F6-7 (E) - Body ground

Always

Below 1 Ω

Text in Illustration

*a

Front view of wire harness connector

(to Back Sonar or Clearance Sonar Switch Assembly)


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

3.

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

(a) Disconnect the F6 back sonar or clearance sonar switch assembly connector.

(b) Disconnect the F95 clearance warning ECU assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

F6-3 (ECU) - F95-1 (IG)

Always

Below 1 Ω

F6-3 (ECU) - Body ground

Always

10 kΩ or higher


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

4.

CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY - BODY GROUND)

(a) Disconnect the F95 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

F95-22 (E) - Body ground

Always

Below 1 Ω

Text in Illustration

*a

Front view of wire harness connector

(to Clearance Warning ECU Assembly)


OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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