LIGHTING SYSTEM PROBLEM SYMPTOMS TABLE

Note


  • If the main body ECU (instrument panel junction block assembly) is replaced, refer to the Service Bulletin.

  • As the door control battery is installed between the vehicle battery and main body ECU (instrument panel junction block assembly), first perform the inspections in On-Vehicle Inspection to confirm that there are no malfunctions in the power source circuit for the main body ECU (instrument panel junction block assembly) before performing this troubleshooting procedure.

  • When replacing the combination meter assembly, make sure to replace it with a new one.

  • After replacing the headlight swivel ECU assembly, initialization of the ECU is necessary Click here.*1

  • After replacing the headlight leveling ECU assembly, initialization of the ECU is necessary Click here.*2


    • *1: w/ AFS

    • *2: w/o AFS

Tech Tips


  • 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.

  • Inspect the fuses related to this system before inspecting the suspected areas below.

Headlight System (for LED Headlight)
Symptom Suspected Area See page
"Low beam" does not turn on (One side) Headlight assembly

Click here

Harness or connector -
"Low beam" does not turn on (Both sides) Headlight dimmer switch circuit

Click here

Headlight signal circuit

Click here

Main body ECU (Instrument panel junction block assembly) -
"High beam" does not turn on (One side) Headlight assembly

Click here

Harness or connector -
"High beam" does not turn on (Both sides) Headlight dimmer switch circuit

Click here

Headlight (HI-BEAM) circuit

Click here

Main body ECU (Instrument panel junction block assembly) -
"Flash" does not turn on (Low beam and high beam are normal) Headlight dimmer switch circuit

Click here

Main body ECU (Instrument panel junction block assembly) -
Headlight System (for Halogen Headlight)
Symptom Suspected Area See page
"Low beam" does not turn on (One side) Headlight bulb

Click here

Harness or connector -
"Low beam" does not turn on (Both sides) Headlight dimmer switch circuit

Click here

Headlight signal circuit

Click here

Main body ECU (Instrument panel junction block assembly) -
"High beam" does not turn on (One side) Headlight bulb

Click here

Headlight (HI-BEAM) circuit

Click here

"High beam" does not turn on (Both sides) Headlight dimmer switch circuit

Click here

Headlight (HI-BEAM) circuit

Click here

Main body ECU (Instrument panel junction block assembly) -
"Flash" does not turn on (Low beam and high beam are normal) Headlight dimmer switch circuit

Click here

Main body ECU (Instrument panel junction block assembly) -
Taillight System
Symptom Suspected Area See page
Taillight does not turn on (All) Headlight dimmer switch circuit
Taillight circuit

Click here

Main body ECU (Instrument panel junction block assembly) -
Front clearance light LH does not turn on Taillight circuit

Click here

Headlight assembly LH (for LED Headlight)

Click here

Headlight assembly LH (for Halogen Headlight)

Click here

Front clearance light RH does not turn on Taillight circuit

Click here

Headlight assembly RH (for LED Headlight)

Click here

Headlight assembly RH (for Halogen Headlight)

Click here

Taillights and license plate lights do not turn on Taillight circuit

Click here

License plate light bulb -
Rear light assembly (for Wagon)

Click here

Rear light assembly (for Sedan)

Click here

Rear combination light assembly (for Wagon)

Click here

Rear combination light assembly (for Sedan)

Click here

Light Auto Turn Off System
Symptom Suspected Area See page
Light auto turn off system does not operate Headlight dimmer switch circuit

Click here

Ignition switch (w/o Entry and Start System [for 1ZR-FAE])

Click here

Ignition switch (w/o Entry and Start System [for 3ZR-FE])

Click here

Ignition switch (w/o Entry and Start System [for 2ZR-FAE])

Click here

Ignition switch (w/o Entry and Start System [for 3ZR-FAE])

Click here

Engine switch (w/ Entry and Start System [for 3ZR-FE])

Click here

Engine switch (w/ Entry and Start System [for 2ZR-FAE])

Click here

Engine switch (w/ Entry and Start System [for 3ZR-FAE])

Click here

Door courtesy switch circuit

Click here

Main body ECU (Instrument panel junction block assembly) -
Front Fog Light System (w/ Front Fog Light)
Symptom Suspected Area See page
Front fog light does not turn on Headlight dimmer switch circuit

Click here

Front fog light circuit

Click here

Main body ECU (Instrument panel junction block assembly) -
Rear Fog Light System (w/ Rear Fog Light)
Symptom Suspected Area See page
Rear fog light does not turn on Headlight dimmer switch circuit

Click here

Rear fog light circuit

Click here

Rear light assembly (for Wagon)

Click here

Rear light assembly (for Sedan)

Click here

Harness or connector -
Main body ECU (Instrument panel junction block assembly) -
Turn Signal Light System
Symptom Suspected Area See page
No turn signal lights operate (hazard warning lights are normal) Turn signal switch circuit

Click here

Combination meter assembly

Click here

One of the turn signal lights does not operate. Meter/gauge system

Click here

Stop Light System
Symptom Suspected Area See page
Stop light on one side does not illuminate Rear combination light assembly (for Wagon)

Click here

Rear combination light assembly (for Sedan)

Click here

Harness or connector -
Center stop light does not illuminate Center stop light assembly (for Wagon)

Click here

Center stop light assembly (for Sedan)

Click here

Harness or connector -
All of the stop lights do not operate Stop light switch assembly

Click here

Harness or connector -
Back-up Light System
Symptom Suspected Area See page
Back-up light does not turn on Back-up light bulb -
Park/neutral position switch (for Automatic Transaxle)

Click here

Park/neutral position switch (for CVT [for K313])

Click here

Park/neutral position switch (for CVT [for K114])

Click here

Back-up light switch (for Manual Transaxle)

Click here

Harness or connector -
Manual Headlight Leveling Control System (for Halogen Headlight)
Symptom Suspected Area See page
Manual headlight leveling control system does not operate Headlight assembly

Click here

Headlight leveling switch (for LHD)

Click here

Headlight leveling switch (for RHD)

Click here

Harness or connector -
Automatic Light Control System (w/ Automatic Light Control System)
Symptom Suspected Area See page
Automatic light control system does not operate Check for DTCs

Click here

Headlight dimmer switch circuit

Click here

Main body ECU (Instrument panel junction block assembly) -
Hazard Warning Light
Symptom Suspected Area See page
Hazard warning lights do not operate (turn signal lights are normal) Hazard warning switch circuit

Click here

Combination meter assembly

Click here

Emergency brake signal (hazard warning light blink) does not operate CAN communication system

Click here

Vehicle stability control system

Click here

Combination meter assembly

Click here

AFS (Adaptive Front-Lighting System) [w/ AFS]
Symptom Suspected Area See page
AFS does not operate Check for DTCs

Click here

Headlight swivel ECU assembly power source

Click here

Headlight swivel ECU assembly

Click here

AFS control cannot be canceled using headlight swivel main switch CAN communication system

Click here

Meter/gauge system

Click here

Combination meter assembly

Click here

Headlight swivel ECU assembly

Click here

Initialization cannot be performed Check for DTCs

Click here

Headlight swivel ECU assembly

Click here

AFS OFF indicator light does not come on when turning ignition switch to ON CAN communication system

Click here

Meter/gauge system

Click here

Headlight swivel ECU assembly

Click here

Combination meter assembly

Click here

Automatic Headlight Beam Level Control System (w/o AFS)
Symptom Suspected Area See page
Automatic headlight beam level control system does not operate Check for DTCs

Click here

Headlight leveling ECU assembly power source

Click here

Headlight beam level control actuator circuit

Click here

Headlight leveling ECU assembly (for LHD)

Click here

Headlight leveling ECU assembly (for RHD)

Click here

Initialization cannot be performed Check for DTCs

Click here

Headlight leveling ECU assembly (for LHD)

Click here

Headlight leveling ECU assembly (for RHD)

Click here

Daytime Running Light System (w/ Daytime Running Light)
Symptom Suspected Area See page
Daytime running light does not turn on (One side) Headlight assembly (for LED Headlight)

Click here

Headlight assembly (for Halogen Headlight)

Click here

Harness or connector -
Daytime running light does not turn on (Both side) CAN communication system

Click here

Headlight dimmer switch circuit

Click here

Daytime running light relay circuit

Click here

Main body ECU (Instrument panel junction block assembly) -
Front Cornering Light System (w/ Cornering Light)
Symptom Suspected Area See page
Front cornering light system does not operate (front fog lights are normal) CAN communication system

Click here

Main body ECU (Instrument panel junction block assembly) -
Headlight swivel ECU assembly

Click here

Follow Me Home System (w/ Automatic Light Control System)
Symptom Suspected Area See page
Follow me home system does not operate Headlight dimmer switch circuit

Click here

Main body ECU (Instrument panel junction block assembly) -