Toyota 4Runner: Clearance Sonar Main Switch Circuit

Toyota 4Runner Service Manual / Audio / Visual / Telematics / Park Assist / Monitoring / Intuitive Parking Assist System / 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 ).

REPLACE BACK SONAR OR CLEARANCE SONAR SWITCH ASSEMBLY

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
F6-6 (IG) - Body ground	Ignition switch off	Below 1 V

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)

REPAIR OR REPLACE HARNESS OR CONNECTOR

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.

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

REPAIR OR REPLACE HARNESS OR CONNECTOR

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)

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

REPAIR OR REPLACE HARNESS OR CONNECTOR

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