Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VJ9Z
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 - 11/2017]
Title: PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM: Clearance Sonar Main Switch Circuit; 2016 - 2017 MY Sienna [12/2015 - 11/2017]

Clearance Sonar Main Switch Circuit

DESCRIPTION

When the clearance sonar main switch turns on, the ON signal is input into the clearance warning ECU.

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 (CLEARANCE SONAR MAIN SWITCH)

(a) Check the Data List for proper functioning of the clearance sonar main switch.

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

-

OK:

The Techstream display changes according to operation of clearance sonar main switch.

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

2.

INSPECT CLEARANCE SONAR MAIN SWITCH

(a) Remove the clearance sonar main switch (See page 2016 - 2020 MY Sienna [12/2015 -        ]; PARK ASSIST / MONITORING: CLEARANCE SONAR MAIN SWITCH: REMOVAL ).

(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)

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

(Clearance Sonar Main Switch)

NG

REPLACE CLEARANCE SONAR MAIN SWITCH

OK

3.

CHECK HARNESS AND CONNECTOR (CLEARANCE SONAR MAIN SWITCH - CLEARANCE WARNING ECU AND BATTERY)

(a) Disconnect the D143 clearance sonar main switch connector.

(b) Disconnect the D77 clearance warning ECU connector.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

D143-6 (IG) - Body ground

Ignition switch ON

11 to 14 V

D143-6 (IG) - Body ground

Ignition switch off

Below 1 V

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D143-3 (ECU) - D77-12 (CSSW)

Always

Below 1 Ω

D143-3 (ECU) - Body ground

Always

10 kΩ or higher

Text in Illustration

*a

Front view of wire harness connector

(to Clearance Sonar Main Switch)

*b

Front view of wire harness connector

(to Clearance Warning ECU)

OK

REPLACE CLEARANCE WARNING ECU

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR