Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VKEV
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 -           ]
Title: WIPER / WASHER: WIPER AND WASHER SYSTEM(w/ Rain Sensor): Power Source Circuit; 2016 - 2020 MY Sienna [12/2015 -        ]

Power Source Circuit

DESCRIPTION

This circuit provides power to the windshield wiper relay assembly.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

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

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER RELAY ASSEMBLY - BATTERY AND BODY GROUND)

(a) Disconnect the D78 windshield wiper relay assembly connector.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

D78-12 (IG) - Body ground

Ignition switch ON

11 to 14 V

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D78-26 (E) - Body ground

Always

Below 1 Ω

Text in Illustration

*a

Front view of wire harness connector

(to Windshield Wiper Relay Assembly)

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR