Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000YS0I
Model Year Start: 2017 Model: Sienna Prod Date Range: [08/2016 -           ]
Title: LIGHTING (INT): LIGHTING SYSTEM: PROBLEM SYMPTOMS TABLE; 2017 - 2020 MY Sienna [08/2016 -        ]

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 symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.

Illuminated Entry System (w/ Overhead Console)

Symptom

Suspected Area

See page

Only transponder key amplifier does not illuminate*1

Transponder key amplifier

2016 - 2020 MY Sienna [12/2015 -        ]; LIGHTING (INT): IGNITION KEY CYLINDER LIGHT: INSPECTION

2017 - 2020 MY Sienna [08/2016 -        ]; LIGHTING (INT): LIGHTING SYSTEM: IG Signal Circuit

Harness or connector

-

Only engine switch illumination does not illuminate*2

Engine switch illumination circuit

2017 - 2020 MY Sienna [08/2016 -        ]; LIGHTING (INT): LIGHTING SYSTEM: Engine Switch Illumination Circuit

Certification ECU (smart key ECU assembly)

2016 - 2017 MY Sienna [12/2015 - 11/2017]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL 2018 - 2020 MY Sienna [11/2017 -        ]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL

Only roof console box assembly does not illuminate

Bulb

-

Harness or connector

-

Only No. 2 room light assembly does not illuminate*3

Bulb

-

Harness or connector

-

Only spot light assembly does not illuminate*4

Bulb

-

Harness or connector

-

Only ceiling light does not illuminate*4

Ceiling light

2016 - 2020 MY Sienna [12/2015 -        ]; LIGHTING (INT): CEILING LIGHT: INSPECTION

Harness or connector

-

Illuminated entry system does not operate normally

DOME fuse

-

DOME CUT relay

-

Door courtesy switch circuit

2016 - 2020 MY Sienna [12/2015 -        ]; LIGHTING (INT): LIGHTING SYSTEM: Door Courtesy Switch Circuit

Door unlock detection switch circuit

2016 - 2020 MY Sienna [12/2015 -        ]; LIGHTING (INT): LIGHTING SYSTEM: Door Unlock Detection Switch Circuit

IG signal circuit

2017 - 2020 MY Sienna [08/2016 -        ]; LIGHTING (INT): LIGHTING SYSTEM: IG Signal Circuit

ACC signal circuit

2017 - 2020 MY Sienna [08/2016 -        ]; LIGHTING (INT): LIGHTING SYSTEM: ACC Signal Circuit

Interior light circuit

2017 - 2020 MY Sienna [08/2016 -        ]; LIGHTING (INT): LIGHTING SYSTEM: Interior Light Circuit

Engine switch illumination circuit (w/ Smart Key System)

2017 - 2020 MY Sienna [08/2016 -        ]; LIGHTING (INT): LIGHTING SYSTEM: Engine Switch Illumination Circuit

Main body ECU

2016 - 2020 MY Sienna [12/2015 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

  • *1: w/o Smart Key System
  • *2: w/ Smart Key System
  • *3: w/o Rear Sliding Roof
  • *4: w/ Rear Sliding Roof

Vanity Light

Symptom

Suspected Area

See page

Vanity light does not illuminate

Visor assembly RH

2016 - 2020 MY Sienna [12/2015 -        ]; LIGHTING (INT): VANITY LIGHT: REMOVAL

Visor assembly LH

2016 - 2020 MY Sienna [12/2015 -        ]; LIGHTING (INT): VANITY LIGHT: REMOVAL

Harness or connector

-

Courtesy Light (w/ Courtesy Light)

Symptom

Suspected Area

See page

Courtesy light does not illuminate

Bulb

-

Courtesy light assembly

2016 - 2020 MY Sienna [12/2015 -        ]; LIGHTING (INT): DOOR COURTESY LIGHT: INSPECTION

Front door courtesy light switch

2016 - 2020 MY Sienna [12/2015 -        ]; LIGHTING (INT): FRONT DOOR COURTESY SWITCH: INSPECTION

Harness or connector

-

Main body ECU

2016 - 2020 MY Sienna [12/2015 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

Console Box Light (w/ Console Box)

Symptom

Suspected Area

See page

Console box light does not illuminate

Console box illumination light assembly

2016 - 2020 MY Sienna [12/2015 -        ]; LIGHTING (INT): CONSOLE BOX LIGHT: INSPECTION

Roof console box assembly

2016 - 2020 MY Sienna [12/2015 -        ]; LIGHTING (INT): PERSONAL LIGHT: REMOVAL

Harness or connector

-

Luggage Compartment Light

Symptom

Suspected Area

See page

Luggage compartment light does not illuminate

Bulb

-

Rear room light assembly

2016 - 2020 MY Sienna [12/2015 -        ]; LIGHTING (INT): LUGGAGE COMPARTMENT ROOM LIGHT: INSPECTION

Back door lock assembly

2016 - 2020 MY Sienna [12/2015 -        ]; DOOR LOCK: BACK DOOR LOCK: INSPECTION

Roof console box assembly

2016 - 2020 MY Sienna [12/2015 -        ]; LIGHTING (INT): PERSONAL LIGHT: REMOVAL

Harness or connector

-

Main body ECU

2016 - 2020 MY Sienna [12/2015 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

Battery Saving Control

Symptom

Suspected Area

See page

Battery saving function does not operate.

Door courtesy switch circuit

2016 - 2020 MY Sienna [12/2015 -        ]; LIGHTING (INT): LIGHTING SYSTEM: Door Courtesy Switch Circuit

Unlock warning switch circuit (w/o Smart Key System)

2016 - 2020 MY Sienna [12/2015 -        ]; DOOR LOCK: UNLOCK WARNING SWITCH: INSPECTION

IG signal circuit

-

Main body ECU

2016 - 2020 MY Sienna [12/2015 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL