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.
Symptom | Suspected Area | See page |
---|---|---|
"Low beam" does not turn on (One side) | Headlight assembly | |
Harness or connector | - | |
"Low beam" does not turn on (Both sides) | Headlight dimmer switch circuit | |
Headlight signal circuit | ||
Main body ECU (Instrument panel junction block assembly) | - | |
"High beam" does not turn on (One side) | Headlight assembly | |
Harness or connector | - | |
"High beam" does not turn on (Both sides) | Headlight dimmer switch circuit | |
Headlight (HI-BEAM) circuit | ||
Main body ECU (Instrument panel junction block assembly) | - | |
"Flash" does not turn on (Low beam and high beam are normal) | Headlight dimmer switch circuit | |
Main body ECU (Instrument panel junction block assembly) | - |
Symptom | Suspected Area | See page |
---|---|---|
"Low beam" does not turn on (One side) | Headlight bulb | |
Harness or connector | - | |
"Low beam" does not turn on (Both sides) | Headlight dimmer switch circuit | |
Headlight signal circuit | ||
Main body ECU (Instrument panel junction block assembly) | - | |
"High beam" does not turn on (One side) | Headlight bulb | |
Headlight (HI-BEAM) circuit | ||
"High beam" does not turn on (Both sides) | Headlight dimmer switch circuit | |
Headlight (HI-BEAM) circuit | ||
Main body ECU (Instrument panel junction block assembly) | - | |
"Flash" does not turn on (Low beam and high beam are normal) | Headlight dimmer switch circuit | |
Main body ECU (Instrument panel junction block assembly) | - |
Symptom | Suspected Area | See page |
---|---|---|
Taillight does not turn on (All) | Headlight dimmer switch circuit | |
Taillight circuit | ||
Main body ECU (Instrument panel junction block assembly) | - | |
Front clearance light LH does not turn on | Taillight circuit | |
Headlight assembly LH (for LED Headlight) | ||
Headlight assembly LH (for Halogen Headlight) | ||
Front clearance light RH does not turn on | Taillight circuit | |
Headlight assembly RH (for LED Headlight) | ||
Headlight assembly RH (for Halogen Headlight) | ||
Taillights and license plate lights do not turn on | Taillight circuit | |
License plate light bulb | - | |
Rear light assembly (for Wagon) | ||
Rear light assembly (for Sedan) | ||
Rear combination light assembly (for Wagon) | ||
Rear combination light assembly (for Sedan) |
Symptom | Suspected Area | See page |
---|---|---|
Light auto turn off system does not operate | Headlight dimmer switch circuit | |
Ignition switch (w/o Entry and Start System [for 1ZR-FAE]) | ||
Ignition switch (w/o Entry and Start System [for 3ZR-FE]) | ||
Ignition switch (w/o Entry and Start System [for 2ZR-FAE]) | ||
Ignition switch (w/o Entry and Start System [for 3ZR-FAE]) | ||
Engine switch (w/ Entry and Start System [for 3ZR-FE]) | ||
Engine switch (w/ Entry and Start System [for 2ZR-FAE]) | ||
Engine switch (w/ Entry and Start System [for 3ZR-FAE]) | ||
Door courtesy switch circuit | ||
Main body ECU (Instrument panel junction block assembly) | - |
Symptom | Suspected Area | See page |
---|---|---|
Front fog light does not turn on | Headlight dimmer switch circuit | |
Front fog light circuit | ||
Main body ECU (Instrument panel junction block assembly) | - |
Symptom | Suspected Area | See page |
---|---|---|
Rear fog light does not turn on | Headlight dimmer switch circuit | |
Rear fog light circuit | ||
Rear light assembly (for Wagon) | ||
Rear light assembly (for Sedan) | ||
Harness or connector | - | |
Main body ECU (Instrument panel junction block assembly) | - |
Symptom | Suspected Area | See page |
---|---|---|
No turn signal lights operate (hazard warning lights are normal) | Turn signal switch circuit | |
Combination meter assembly | ||
One of the turn signal lights does not operate. | Meter/gauge system |
Symptom | Suspected Area | See page |
---|---|---|
Stop light on one side does not illuminate | Rear combination light assembly (for Wagon) | |
Rear combination light assembly (for Sedan) | ||
Harness or connector | - | |
Center stop light does not illuminate | Center stop light assembly (for Wagon) | |
Center stop light assembly (for Sedan) | ||
Harness or connector | - | |
All of the stop lights do not operate | Stop light switch assembly | |
Harness or connector | - |
Symptom | Suspected Area | See page |
---|---|---|
Back-up light does not turn on | Back-up light bulb | - |
Park/neutral position switch (for Automatic Transaxle) | ||
Park/neutral position switch (for CVT [for K313]) | ||
Park/neutral position switch (for CVT [for K114]) | ||
Back-up light switch (for Manual Transaxle) | ||
Harness or connector | - |
Symptom | Suspected Area | See page |
---|---|---|
Manual headlight leveling control system does not operate | Headlight assembly | |
Headlight leveling switch (for LHD) | ||
Headlight leveling switch (for RHD) | ||
Harness or connector | - |
Symptom | Suspected Area | See page |
---|---|---|
Automatic light control system does not operate | Check for DTCs | |
Headlight dimmer switch circuit | ||
Main body ECU (Instrument panel junction block assembly) | - |
Symptom | Suspected Area | See page |
---|---|---|
Hazard warning lights do not operate (turn signal lights are normal) | Hazard warning switch circuit | |
Combination meter assembly | ||
Emergency brake signal (hazard warning light blink) does not operate | CAN communication system | |
Vehicle stability control system | ||
Combination meter assembly |
Symptom | Suspected Area | See page |
---|---|---|
AFS does not operate | Check for DTCs | |
Headlight swivel ECU assembly power source | ||
Headlight swivel ECU assembly | ||
AFS control cannot be canceled using headlight swivel main switch | CAN communication system | |
Meter/gauge system | ||
Combination meter assembly | ||
Headlight swivel ECU assembly | ||
Initialization cannot be performed | Check for DTCs | |
Headlight swivel ECU assembly | ||
AFS OFF indicator light does not come on when turning ignition switch to ON | CAN communication system | |
Meter/gauge system | ||
Headlight swivel ECU assembly | ||
Combination meter assembly |
Symptom | Suspected Area | See page |
---|---|---|
Automatic headlight beam level control system does not operate | Check for DTCs | |
Headlight leveling ECU assembly power source | ||
Headlight beam level control actuator circuit | ||
Headlight leveling ECU assembly (for LHD) | ||
Headlight leveling ECU assembly (for RHD) | ||
Initialization cannot be performed | Check for DTCs | |
Headlight leveling ECU assembly (for LHD) | ||
Headlight leveling ECU assembly (for RHD) |
Symptom | Suspected Area | See page |
---|---|---|
Daytime running light does not turn on (One side) | Headlight assembly (for LED Headlight) | |
Headlight assembly (for Halogen Headlight) | ||
Harness or connector | - | |
Daytime running light does not turn on (Both side) | CAN communication system | |
Headlight dimmer switch circuit | ||
Daytime running light relay circuit | ||
Main body ECU (Instrument panel junction block assembly) | - |
Symptom | Suspected Area | See page |
---|---|---|
Front cornering light system does not operate (front fog lights are normal) | CAN communication system | |
Main body ECU (Instrument panel junction block assembly) | - | |
Headlight swivel ECU assembly |
Symptom | Suspected Area | See page |
---|---|---|
Follow me home system does not operate | Headlight dimmer switch circuit | |
Main body ECU (Instrument panel junction block assembly) | - |