| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000ZY82 |
| Model Year Start: 2017 | Model: Sienna | Prod Date Range: [08/2016 - 11/2017] |
| Title: LIGHTING (EXT): LIGHTING SYSTEM: PROBLEM SYMPTOMS TABLE; 2017 MY Sienna [08/2016 - 11/2017] | ||
PROBLEM SYMPTOMS TABLE
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.
Headlight and Taillight
|
Symptom |
Suspected Area |
See page |
|---|---|---|
|
One low beam headlight does not illuminate. |
Bulb (for Halogen Headlight) |
- |
|
Discharge headlight bulb (w/ HID Headlight System) |
|
|
|
Headlight Relay (H-LP Relay) |
|
|
|
Harness or connector |
- |
|
|
Light control ECU (w/ HID Headlight System) |
|
|
|
Both left and right low beam headlights do not illuminate. |
Light control switch circuit |
|
|
Headlight relay circuit |
|
|
|
Headlight Relay (H-LP Relay) |
|
|
|
Harness or connector |
- |
|
|
Instrument panel junction block assembly |
- |
|
|
Main body ECU |
|
|
|
One high beam headlight does not illuminate. |
H-LP LH HI fuse or H-LP RH HI fuse |
- |
|
Bulb |
- |
|
|
Running light relay (w/ Daytime Running Light System) |
|
|
|
Harness or connector |
- |
|
|
Both left and right high beam headlights do not illuminate. |
Light control switch circuit |
|
|
High beam headlight circuit |
|
|
|
Running light relay (w/ Daytime Running Light System) |
|
|
|
Headlight dimmer relay (DIM Relay) (w/o Daytime Running Light System) |
|
|
|
Instrument panel junction block assembly |
- |
|
|
Main body ECU |
|
|
|
"High Flash" (passing function) headlight does not illuminate (high beam headlights are normal). |
Light control switch circuit |
|
|
Instrument panel junction block assembly |
- |
|
|
Main body ECU |
|
|
|
Discharge headlight bulb flickers. |
Harness or connector |
- |
|
Discharge headlight bulb (w/ HID Headlight System) |
|
|
|
Light control ECU (w/ HID Headlight System) |
|
|
|
Discharge headlight bulb is dark. |
Harness or connector |
- |
|
Discharge headlight bulb (w/ HID Headlight System) |
|
|
|
Light control ECU (w/ HID Headlight System) |
|
|
|
Discharge headlight bulb does not come on at intervals. |
Harness or connector |
- |
|
Discharge headlight bulb (w/ HID Headlight System) |
|
|
|
Light control ECU (w/ HID Headlight System) |
|
|
|
One front parking/side marker light does not illuminate. |
Bulb (for DRL Bulb Type) |
- |
|
Headlight assembly (for DRL LED Type) |
- |
|
|
Harness or connector |
- |
|
|
One rear taillight does not illuminate. |
Bulb (for Bulb Stop Light Type) |
- |
|
Rear light assembly (for LED Stop Light Type) |
- |
|
|
Harness or connector |
- |
|
|
One rear side marker does not illuminate. |
Rear combination light assembly |
|
|
Harness or connector |
- |
|
|
One license plate light does not illuminate. |
Bulb |
- |
|
Harness or connector |
- |
|
|
All of the lights (rear taillights, front parking/side marker lights, license plate lights and rear side marker lights) do not illuminate. |
TAIL fuse |
- |
|
Light control switch circuit |
|
|
|
Taillight relay circuit |
|
|
|
Instrument panel junction block assembly |
- |
|
|
Main body ECU |
|
![2016 - 2020 MY Sienna [12/2015 - ]; LIGHTING (EXT): HIGH INTENSITY DISCHARGE HEADLIGHT BULB: ON-VEHICLE INSPECTION](/t3Portal/stylegraphics/info.gif)
Stop Light
|
Symptom |
Suspected Area |
See page |
|---|---|---|
|
One side stop light does not illuminate. |
Rear combination light assembly (for LED Type Stop Light) |
|
|
Bulb (for Bulb Type Stop Light) |
- |
|
|
Harness or connector |
- |
|
|
High mounted stop light does not illuminate. |
High mounted stop light assembly |
|
|
Harness or connector |
- |
|
|
All of lights do not illuminate. |
STOP fuse |
- |
|
ECU-IG NO.1 fuse (w/ Dynamic Radar Cruise Control) |
- |
|
|
Stop light switch assembly (for Bulb Type Stop Light) |
|
|
|
Stop light switch assembly (for LED Type Stop Light) |
|
|
|
STOP LP relay (w/ Dynamic Radar Cruise Control) |
- |
|
|
Harness or connector |
- |
Front Fog Light
|
Symptom |
Suspected Area |
See page |
|---|---|---|
|
One side front fog light does not illuminate. |
Bulb |
- |
|
Harness or connector |
- |
|
|
Both left and right front fog lights do not illuminate (taillight is normal). |
TAIL fuse or FOG FR fuse |
- |
|
Light control switch circuit |
|
|
|
Front fog light circuit |
|
|
|
Front fog light relay |
|
|
|
Main body ECU |
|
Back-up Light
|
Symptom |
Suspected Area |
See page |
|---|---|---|
|
One back-up light does not illuminate. |
Bulb |
- |
|
Harness or connector |
- |
|
|
Both left and right back-up lights do not illuminate. |
GAUGE NO. 1 fuse |
- |
|
Park/neutral position switch (for UA80F) |
|
|
|
Park/neutral position switch (for UA80E) |
|
|
|
Harness or connector |
- |
Turn Signal and Hazard Warning Light
|
Symptom |
Suspected Area |
See page |
|---|---|---|
|
Hazard warning lights do not operate (turn signal lights are normal). |
HAZ fuse |
- |
|
Hazard warning switch circuit |
|
|
|
Combination meter assembly |
|
|
|
Turn signal lights do not operate (hazard warning lights are normal). |
Check the DTC (meter / gauge system) |
|
|
Turn signal switch circuit |
|
|
|
Combination meter assembly |
|
|
|
Turn signal lights do not operate in one direction. |
Check for DTCs (meter / gauge system) |
|
|
Turn signal switch circuit |
|
|
|
Combination meter assembly |
|
|
|
Front turn signal light on one side does not illuminate. |
Check for DTCs (meter / gauge system) |
|
|
Bulb |
- |
|
|
Harness or connector |
- |
|
|
Side turn signal light on one side does not illuminate. |
Check for DTCs (meter / gauge system) |
|
|
Bulb |
- |
|
|
Side turn signal light assembly (w/ HID Headlight System) |
- |
|
|
Outer mirror control ECU (w/ Seat Position Memory) |
- |
|
|
Outer rear view mirror assembly (w/ Seat Position Memory) |
- |
|
|
Harness or connector |
- |
|
|
Rear turn signal light on one side does not illuminate. |
Check for DTCs (meter / gauge system) |
|
|
Bulb |
- |
|
|
Harness or connector |
- |
Automatic Light Control System
|
Symptom |
Suspected Area |
See page |
|---|---|---|
|
Automatic light control system does not operate. |
Check DTCs |
|
|
Light control switch circuit |
|
|
|
IG signal circuit |
|
|
|
Main body ECU |
|
Light Auto Turn-off System
|
Symptom |
Suspected Area |
See page |
|---|---|---|
|
Light auto turn-off system does not operate. |
Light control switch circuit |
|
|
Door courtesy switch circuit |
|
|
|
IG signal circuit |
|
|
|
Main body ECU |
|
Daytime Running Light System
|
Symptom |
Suspected Area |
See page |
|---|---|---|
|
Daytime running light system does not operate. |
Check CAN communication system |
|
|
Daytime running light relay circuit |
|
|
|
Light control switch circuit |
|
|
|
IG signal circuit |
|
|
|
Parking brake switch circuit |
|
|
|
High beam headlight circuit |
|
|
|
Meter / gauge system |
|
|
|
Main body ECU |
|
Automatic High Beam System
|
Symptom |
Suspected Area |
See page |
|---|---|---|
|
Inner rear view mirror assembly indicator light does not come on when the ignition switch is turned from off to ON. |
Inner rear view mirror power source circuit |
|
|
Inner rear view mirror assembly |
|
|
|
Inner rear view mirror assembly indicator light remains on when the inner rear view mirror assembly AUTO switch is pressed. |
Inner rear view mirror assembly |
|
|
Inner rear view mirror assembly indicator light flashes. |
Perform operation check |
|
|
Inner rear view mirror assembly |
|
|
|
Automatic high beam indicator light does not come on when the automatic high beam system is in standby mode (automatic light control system operates normally). |
Perform operation check |
|
|
Light control switch circuit |
|
|
|
Combination meter assembly |
|
|
|
Automatic high beam system does not operate (automatic high beam indicator light flashes). |
Check DTCs |
|
|
Combination meter assembly |
|
|
|
Automatic high beam system does not operate (automatic high beam indicator light is on or off). |
Inner rear view mirror assembly (Camera detection malfunction*1) |
|
|
Inner rear view mirror assembly (Aiming misalignment*2) |
|
NOTICE:
*1: Camera detection malfunctions can be detected using the Techstream. Under the following conditions, if the camera built into the inner rear view mirror assembly cannot detect other vehicles or lights correctly, it will stop automatic high beam control and turn off the automatic high beam indicator light:
- When the front windshield is not clear (ice, snow or frost on the glass).
- When the front windshield is dirty (sand, mud, water stains or bugs are on the glass).
*2: Aiming misalignment of the camera can be detected using the Techstream. Under the following conditions, the camera built in to the rear view mirror assembly cannot adjust its center point:
- When the inner rear view mirror assembly is on an angle due to mis-installation or damage to the camera.
- When the automatic aiming adjusting function of the mirror does not work correctly.
If the camera aiming is misaligned, check the following conditions:
- Check if the vehicle is inclined.
- Check if the windshield glass is installed correctly.
- Check if the inner rear view mirror assembly is installed correctly.
- Check if there is deformation of the camera or stay of the inner rear view mirror assembly.
Door Mirror Foot Light
|
Symptom |
Suspected Area |
See page |
|---|---|---|
|
One door mirror foot light does not illuminate. |
Door mirror foot light assembly |
|
|
Door mirror foot light circuit |
|
|
|
Outer mirror control ECU assembly |
|
|
|
Both left and right door mirror foot lights do not illuminate. |
Power door lock control system |
|
|
Wireless door lock control system |
|
|
|
Door mirror foot light circuit |
|
|
|
Door courtesy switch circuit |
|
|
|
Door unlock detection switch circuit |
|
|
|
IG signal circuit |
|
|
|
Main body ECU |
|
|
|