Toyota Tacoma (2015-2018) Service Manual: Clearance Sonar Main Switch Circuit

Toyota Tacoma (2015-2018) Service Manual / Park Assist / Monitoring / Intuitive Parking Assist System / 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

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.

(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	-

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

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

REPLACE CLEARANCE WARNING ECU ASSEMBLY

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)

REPLACE BACK SONAR OR CLEARANCE SONAR SWITCH ASSEMBLY

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

REPAIR OR REPLACE HARNESS OR CONNECTOR

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

REPLACE CLEARANCE WARNING ECU ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

Rear Left Center Sensor Malfunction (C1AE7)

DESCRIPTION The No. 1 ultrasonic sensor (rear center sensor LH) is installed on the rear bumper. The ECU detects obstacles based on signals received from the No. 1 ultrasonic sensor (rear center ...

Clearance Warning Buzzer Circuit

DESCRIPTION This circuit consists of the No. 1 clearance warning buzzer and clearance warning ECU assembly. An ECU-excited type buzzer is used. The battery voltage supplied through the buzzer is ...

Other materials:

Data List / Active Test
DATA LIST / ACTIVE TEST 1. DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals ...

Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each sy ...

Antenna Coil Open / Short (B2784)
DESCRIPTION When an open or short circuit is detected in the antenna coil built into the transponder key coil, the transponder key ECU assembly stores this DTC. DTC No. DTC Detection Condition Trouble Area DTC Output Confirmation Operation ...