Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VKES
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 -           ]
Title: WIPER / WASHER: WIPER AND WASHER SYSTEM(w/ Rain Sensor): PROBLEM SYMPTOMS TABLE; 2016 - 2020 MY Sienna [12/2015 -        ]

PROBLEM SYMPTOMS TABLE

HINT:

Use the table below to help determine the cause of the problem symptom. The potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.

Front Wiper and Washer

Symptom

Suspected Area

See page

Front wipers and washer do not operate

WIP fuse

-

Windshield wiper relay assembly

2016 - 2020 MY Sienna [12/2015 -        ]; WIPER / WASHER: WIPER ECU: REMOVAL

Harness or connector

-

Front wipers do not operate at all

Power source circuit

2016 - 2020 MY Sienna [12/2015 -        ]; WIPER / WASHER: WIPER AND WASHER SYSTEM(w/ Rain Sensor): Power Source Circuit

Front wiper motor circuit

2016 - 2020 MY Sienna [12/2015 -        ]; WIPER / WASHER: WIPER AND WASHER SYSTEM(w/ Rain Sensor): Front Wiper Motor Circuit

Windshield wiper relay assembly

2016 - 2020 MY Sienna [12/2015 -        ]; WIPER / WASHER: WIPER ECU: REMOVAL

Front wipers do not operate in AUTO

Rain sensor tape*1

-

Wiper and washer switch circuit

2016 - 2020 MY Sienna [12/2015 -        ]; WIPER / WASHER: WIPER AND WASHER SYSTEM(w/ Rain Sensor): Wiper and Washer Switch Circuit

Rain sensor circuit

2016 - 2020 MY Sienna [12/2015 -        ]; WIPER / WASHER: WIPER AND WASHER SYSTEM(w/ Rain Sensor): Rain Sensor Circuit

Speed signal circuit

2016 - 2020 MY Sienna [12/2015 -        ]; WIPER / WASHER: WIPER AND WASHER SYSTEM(w/ Rain Sensor): Speed Signal Circuit

Windshield wiper relay assembly

2016 - 2020 MY Sienna [12/2015 -        ]; WIPER / WASHER: WIPER ECU: REMOVAL

Front wipers do not operate in LO

Wiper and washer switch circuit

2016 - 2020 MY Sienna [12/2015 -        ]; WIPER / WASHER: WIPER AND WASHER SYSTEM(w/ Rain Sensor): Wiper and Washer Switch Circuit

Front wiper motor circuit

2016 - 2020 MY Sienna [12/2015 -        ]; WIPER / WASHER: WIPER AND WASHER SYSTEM(w/ Rain Sensor): Front Wiper Motor Circuit

Windshield wiper relay assembly

2016 - 2020 MY Sienna [12/2015 -        ]; WIPER / WASHER: WIPER ECU: REMOVAL

Front wipers do not operate in HI

Wiper and washer switch circuit

2016 - 2020 MY Sienna [12/2015 -        ]; WIPER / WASHER: WIPER AND WASHER SYSTEM(w/ Rain Sensor): Wiper and Washer Switch Circuit

Front wiper motor circuit

2016 - 2020 MY Sienna [12/2015 -        ]; WIPER / WASHER: WIPER AND WASHER SYSTEM(w/ Rain Sensor): Front Wiper Motor Circuit

Windshield wiper relay assembly

2016 - 2020 MY Sienna [12/2015 -        ]; WIPER / WASHER: WIPER ECU: REMOVAL

Front washer motor does not operate

Windshield washer motor and pump assembly

2016 - 2020 MY Sienna [12/2015 -        ]; WIPER / WASHER: WASHER MOTOR(for Front Side): INSPECTION

Windshield wiper switch assembly

2016 - 2020 MY Sienna [12/2015 -        ]; WIPER / WASHER: WIPER SWITCH: INSPECTION

Harness or connector

-

Washer fluid does not flow

Washer hose and nozzle

-

Front wipers do not operate when front washer switch is ON

Wiper and washer switch circuit

2016 - 2020 MY Sienna [12/2015 -        ]; WIPER / WASHER: WIPER AND WASHER SYSTEM(w/ Rain Sensor): Wiper and Washer Switch Circuit

Windshield wiper relay assembly

2016 - 2020 MY Sienna [12/2015 -        ]; WIPER / WASHER: WIPER ECU: REMOVAL

When the front wiper switch is OFF, the wiper blades do not park or park in the wrong position

Front wiper arm installation position

-

Windshield wiper motor assembly

2016 - 2020 MY Sienna [12/2015 -        ]; WIPER / WASHER: FRONT WIPER MOTOR: INSPECTION

HINT:

*1: Before inspecting the rain sensor, first check if the rain sensor tape is correctly installed.

Rear Wiper and Washer

Symptom

Suspected Area

See page

Rear wiper and washer do not operate

WASHER RR fuse

-

Windshield wiper switch assembly

2016 - 2020 MY Sienna [12/2015 -        ]; WIPER / WASHER: WIPER SWITCH: INSPECTION

Harness or connector

-

Rear wiper does not operate in LO or HI

Windshield wiper switch assembly

2016 - 2020 MY Sienna [12/2015 -        ]; WIPER / WASHER: WIPER SWITCH: INSPECTION

Rear wiper motor assembly

2016 - 2020 MY Sienna [12/2015 -        ]; WIPER / WASHER: REAR WIPER MOTOR: INSPECTION

Harness or connector

-

Rear washer motor does not operate

Windshield wiper switch assembly

2016 - 2020 MY Sienna [12/2015 -        ]; WIPER / WASHER: WIPER SWITCH: INSPECTION

Rear washer motor assembly

2016 - 2020 MY Sienna [12/2015 -        ]; WIPER / WASHER: WASHER MOTOR(for Rear Side): INSPECTION

Harness or connector

-

Washer fluid does not flow

Washer hose and nozzle

-

When the rear wiper switch is OFF, the wiper blade does not park or parks in the wrong position

Rear wiper arm installation position

-

Rear wiper motor assembly

2016 - 2020 MY Sienna [12/2015 -        ]; WIPER / WASHER: REAR WIPER MOTOR: INSPECTION

Washer Fluid Level Warning System

Symptom

Suspected Area

See page

Washer fluid level warning system does not operate

Washer fluid level warning switch

2016 - 2020 MY Sienna [12/2015 -        ]; WIPER / WASHER: WASHER LEVEL WARNING SWITCH: INSPECTION

Combination meter assembly

2016 MY Sienna [12/2015 - 08/2016]; METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM: PROBLEM SYMPTOMS TABLE 2017 MY Sienna [08/2016 - 11/2017]; METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM: PROBLEM SYMPTOMS TABLE 2018 - 2020 MY Sienna [11/2017 -        ]; METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM: PROBLEM SYMPTOMS TABLE