LIGHTING SYSTEM 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 (for Halogen Headlight)
Symptom Suspected Area Link
One low beam headlight does not illuminate H-LP LH-LO fuse or H-LP RH-LO fuse -
Bulb -
Harness or connector -
Both left and right low beam headlights do not illuminate H-LP-MAIN fuse -
Headlight dimmer switch circuit

Click here

Low beam headlight circuit

Click here

Main body ECU (Multiplex network body ECU) (for LHD)

Click here

Main body ECU (Multiplex network body ECU) (for RHD)

Click here

One high beam headlight does not illuminate H-LP LH-HI fuse or H-LP RH-HI fuse -
Headlight unit

Click here

Harness or connector -
Both left and right high beam headlights do not illuminate Headlight dimmer switch circuit

Click here

Headlight solenoid circuit

Click here

Main body ECU (Multiplex network body ECU) (for LHD)

Click here

Main body ECU (Multiplex network body ECU) (for RHD)

Click here

"High Flash" (passing function) does not illuminate low beam headlights (high beam headlights are normal) Headlight dimmer switch circuit

Click here

Main body ECU (Multiplex network body ECU) (for LHD)

Click here

Main body ECU (Multiplex network body ECU) (for RHD)

Click here

One front parking light does not illuminate Headlight unit

Click here

Harness or connector -
Instrument panel junction block assembly (for LHD)

Click here

Instrument panel junction block assembly (for RHD)

Click here

Headlight (for HID Headlight)
Symptom Suspected Area Link
One low beam headlight does not illuminate H-LP LH-LO fuse or H-LP RH-LO fuse -
Discharge headlight bulb

Click here

Harness or connector -
Headlight light control ECU sub-assembly

Click here

Headlight unit

Click here

Both left and right low beam headlights do not illuminate H-LP-MAIN fuse -
Headlight dimmer switch circuit

Click here

Low beam headlight circuit

Click here

Main body ECU (Multiplex network body ECU) (for LHD)

Click here

Main body ECU (Multiplex network body ECU) (for RHD)

Click here

One high beam headlight does not illuminate H-LP LH-HI fuse or H-LP RH-HI fuse -
Headlight unit

Click here

Harness or connector -
Both left and right high beam headlights do not illuminate Headlight dimmer switch circuit

Click here

Headlight solenoid circuit

Click here

Main body ECU (Multiplex network body ECU) (for LHD)

Click here

Main body ECU (Multiplex network body ECU) (for RHD)

Click here

"High Flash" (passing function) does not illuminate low beam headlights (high beam headlights are normal) Headlight dimmer switch circuit

Click here

Main body ECU (Multiplex network body ECU) (for LHD)

Click here

Main body ECU (Multiplex network body ECU) (for RHD)

Click here

Discharge headlight bulb flickers Discharge headlight bulb

Click here

Harness or connector -
Headlight light control ECU sub-assembly

Click here

Discharge headlight bulb is dark Discharge headlight bulb

Click here

Harness or connector -
Headlight light control ECU sub-assembly

Click here

One front parking light does not illuminate Headlight unit

Click here

Harness or connector -
Instrument panel junction block assembly (for LHD)

Click here

Instrument panel junction block assembly (for RHD)

Click here

Taillight
Symptom Suspected Area Link
One taillight (rear combination light assembly) does not illuminate Bulb -
Rear combination light socket and wire sub-assembly

Click here

Harness or connector -
All of the lights (taillights, parking lights and license plate lights) do not illuminate (TAIL fuse is normal) Headlight dimmer switch circuit

Click here

Taillight relay circuit

Click here

Main body ECU (Multiplex network body ECU) (for LHD)

Click here

Main body ECU (Multiplex network body ECU) (for RHD)

Click here

All of the lights (taillights, parking lights and license plate lights) do not illuminate (TAIL fuse brakes when replaced) Harness or connector -
License plate light assembly

Click here

Rear combination light socket and wire sub-assembly

Click here

Headlight unit

Click here

License Plate Light
Symptom Suspected Area Link
Both left and right license plate lights do not illuminate Harness or connector -
One license plate light does not illuminate Bulb -
License plate light socket plug

Click here

Harness or connector -
Stop Light
Symptom Suspected Area Link
One side stop light does not illuminate Rear combination light LED

Click here

Rear combination light socket and wire sub-assembly

Click here

Harness or connector -
Center stop light does not illuminate Center stop light assembly

Click here

Radio setting condenser

Click here

Harness or connector -
All of the stop lights do not illuminate STOP fuse -
Stop light switch assembly

Click here

Harness or connector -
Front Fog Light*1
Symptom Suspected Area Link
One front fog light does not illuminate Bulb -
Harness or connector -
Both left and right front fog lights do not illuminate (taillights are normal) Headlight dimmer switch circuit

Click here

Front fog light circuit

Click here

Main body ECU (Multiplex network body ECU) (for LHD)

Click here

Main body ECU (Multiplex network body ECU) (for RHD)

Click here

*1: w/ Front Fog Light

Rear Fog Light
Symptom Suspected Area Link
Rear fog light does not illuminate (taillights are normal) Bulb -
Headlight dimmer switch circuit

Click here

Rear fog light circuit

Click here

Main body ECU (Multiplex network body ECU) (for LHD)

Click here

Main body ECU (Multiplex network body ECU) (for RHD)

Click here

Back-up Light
Symptom Suspected Area Link
Back-up light does not illuminate Check for DTC (hybrid control system)

Click here

BKUP LP fuse -
BKUP LP relay

Click here

Bulb -
Back-up light socket

Click here

Harness or connector -
Turn Signal Light
Symptom Suspected Area Link
One turn signal light does not operate (except side turn signal lights) Bulb -
Front turn signal light socket

Click here

Rear combination light socket and wire sub-assembly

Click here

Harness or connector -
Side turn signal light does not operate Bulb -
Side turn signal light assembly

Click here

Outer rear view mirror assembly

Click here

Harness or connector -
Turn signal lights do not operate in one direction Turn signal switch circuit

Click here

Meter/gauge system

Click here

All turn signal lights do not operate Turn signal switch circuit

Click here

Combination meter assembly

Click here

All turn signal lights do not flash at the correct speed Combination meter assembly

Click here

Hazard Warning Light
Symptom Suspected Area Link
Hazard warning lights do not operate Hazard warning switch circuit

Click here

Combination meter assembly

Click here

Automatic Light Control System*1
Symptom Suspected Area Link
Automatic light control system does not operate Check DTCs

Click here

Headlight dimmer switch circuit

Click here

Main body ECU (Multiplex network body ECU) (for LHD)

Click here

Main body ECU (Multiplex network body ECU) (for RHD)

Click here

*1: w/ Automatic Light Control

Light Auto Turn-off System
Symptom Suspected Area Link
Light auto turn-off system does not operate Headlight dimmer switch circuit

Click here

IG signal circuit

Click here

Main body ECU (Multiplex network body ECU) (for LHD)

Click here

Main body ECU (Multiplex network body ECU) (for RHD)

Click here

Daytime Running Light System
Symptom Suspected Area Link
Daytime running light system does not operate (both left and right daytime running lights do not illuminate) CAN communication system

Click here

Headlight dimmer switch circuit

Click here

IG signal circuit

Click here

Daytime running light relay circuit

Click here

Main body ECU (Multiplex network body ECU) (for LHD)

Click here

Main body ECU (Multiplex network body ECU) (for RHD)

Click here

One side daytime running light does not illuminate Headlight unit

Click here

Harness or connector -
Follow Me Home System
Symptom Suspected Area Link
Follow me home system does not operate IG signal circuit

Click here

Headlight dimmer switch circuit

Click here

Main body ECU (Multiplex network body ECU) (for LHD)

Click here

Main body ECU (Multiplex network body ECU) (for RHD)

Click here