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Problem Symptoms Table

If a normal system code is displayed during the DTC check but the problem still occurs, check the circuits for each problem symptom in the order given in the table below and proceed to the relevant troubleshooting page.

HINT:

Inspect the fuse and relay before confirming the suspected area in the table below.

Inspect each malfunction circuit in numerical order for the corresponding symptom.

If the malfunction still exists even after checking and confirming that all the circuits are normal, replace the ECU.

  1. HEADLIGHT AND TAIL LIGHT SYSTEM 
    PROBLEM SYMPTOMS TABLE - HEADLIGHT AND TAIL LIGHT SYSTEM

    Symptom Suspected Area See
    "Low beam" does not come on (One side). 1. Bulb -
    2. Headlight relay circuit HEADLIGHT RELAY CIRCUIT 
    "Low beam" does not come on (Both sides). 1. Bulb -
    2. Combination switch ECU power source circuit COMBINATION SWITCH ECU POWER SOURCE CIRCUIT 
    3. Light control switch circuit LIGHT CONTROL SWITCH CIRCUIT 
    4. Headlight relay circuit HEADLIGHT RELAY CIRCUIT 
    5. Front controller -
    6. Body ECU -
    "High beam" does not come on (One side). 1. Bulb -
    2. Headlight (HI-BEAM) circuit HEADLIGHT (HI-BEAM) CIRCUIT 
    3. Front controller -
    "High beam" does not come on (Both sides). 1. Bulb -
    2. Combination switch ECU power source circuit COMBINATION SWITCH ECU POWER SOURCE CIRCUIT 
    3. Light control switch circuit LIGHT CONTROL SWITCH CIRCUIT 
    4. Headlight (HI-BEAM) circuit HEADLIGHT (HI-BEAM) CIRCUIT 
    5. Front controller -
    6. Body ECU -
    "High beam" does not go off 1. Light control switch circuit LIGHT CONTROL SWITCH CIRCUIT 
    2. Headlight (HI-BEAM) circuit HEADLIGHT (HI-BEAM) CIRCUIT 
    3. Front controller -
    "Flash" does not come on. (Low beam and Hi-Beam are normal) 1. Combination switch ECU power source circuit COMBINATION SWITCH ECU POWER SOURCE CIRCUIT 
    2. Light control switch circuit LIGHT CONTROL SWITCH CIRCUIT 
    3. Body ECU -
    Tail light does not come on (All). 1. Combination switch ECU power source circuit COMBINATION SWITCH ECU POWER SOURCE CIRCUIT 
    2. Light control switch circuit LIGHT CONTROL SWITCH CIRCUIT 
    3. TAIL relay circuit TAILLIGHT RELAY CIRCUIT 
    4. Body ECU -
    Only one tail light comes on. 1. Bulb -
    2. Wire harness or connector -
    Daytime running light system does not operate. 1. Combination switch ECU power source circuit COMBINATION SWITCH ECU POWER SOURCE CIRCUIT 
    2. Light control switch circuit LIGHT CONTROL SWITCH CIRCUIT 
    3. Generator signal circuit GENERATOR SIGNAL CIRCUIT 
    4. Parking brake switch circuit PARKING BRAKE SWITCH CIRCUIT 
    5. Ignition switch circuit IGNITION SWITCH CIRCUIT 
    6. Headlight (HI-BEAM) circuit HEADLIGHT (HI-BEAM) CIRCUIT 
    7. Front controller -
    8. Body ECU -
  2. HEADLIGHT BEAM LEVEL CONTROL SYSTEM 
    PROBLEM SYMPTOMS TABLE - HEADLIGHT BEAM LEVEL CONTROL SYSTEM

    Symptom Suspected Area See
    Headlight beam level control system does not operate. 1. Headlight beam level control actuator circuit HEADLIGHT BEAM LEVEL CONTROL ACTUATOR CIRCUIT 
    2. Height control sensor circuit HEIGHT CONTROL SENSOR CIRCUIT 
    3. Headlight beam level control ECU communication circuit HEADLIGHT BEAM LEVEL CONTROL ECU COMMUNICATION CIRCUIT 
    4. Headlight beam level control ECU power source circuit HEADLIGHT LEVELING ECU POWER SOURCE CIRCUIT 
    5. Headlight beam level control ECU LH 69
    Headlight beam warning light comes on. (Headlight beam level control system is normal) 1. Headlight beam level warning circuit HEADLIGHT BEAM LEVEL WARNING CIRCUIT 
    2. Combination meter assembly -
    3. Headlight beam level control ECU HEADLIGHT LEVELING ECU 
    Headlight beam warning light does not come on. (Headlight beam level control system is normal) 1. Headlight beam level warning circuit HEADLIGHT BEAM LEVEL WARNING CIRCUIT 
    2. Combination meter assembly -
    3. Headlight beam level control ECU HEADLIGHT LEVELING ECU 
  3. AUTOMATIC LIGHT CONTROL SYSTEM 
    PROBLEM SYMPTOMS TABLE - AUTOMATIC LIGHT CONTROL SYSTEM

    Symptom Suspected Area See
    Automatic light control system does not operate. 1. Combination switch ECU power source circuit COMBINATION SWITCH ECU POWER SOURCE CIRCUIT 
    2. Light control switch circuit LIGHT CONTROL SWITCH CIRCUIT 
    3. Ignition switch circuit IGNITION SWITCH CIRCUIT 
    4. Automatic light control sensor circuit DTC B1244 LIGHT SENSOR CIRCUIT MALFUNCTION 
    5. Body ECU -
  4. LIGHT AUTO TURN OFF SYSTEM 
    PROBLEM SYMPTOMS TABLE - LIGHT AUTO TURN OFF SYSTEM

    Symptom Suspected Area See
    Light auto turn off system does not operate. 1. Combination switch ECU power source circuit COMBINATION SWITCH ECU POWER SOURCE CIRCUIT 
    2. Light control switch circuit LIGHT CONTROL SWITCH CIRCUIT 
    3. Ignition switch circuit IGNITION SWITCH CIRCUIT 
    4. Door courtesy switch circuit DOOR COURTESY SWITCH CIRCUIT 
    5. Front controller -
    6. Body ECU -
  5. FOG LIGHT SYSTEM 
    PROBLEM SYMPTOMS TABLE - FOG LIGHT SYSTEM

    Symptom Suspected Area See
    Front fog light does not come on with the light control switch in TAIL or HEAD position (TAIL and HEAD are normal). 1. Combination switch ECU power source circuit COMBINATION SWITCH ECU POWER SOURCE CIRCUIT 
    2. Light control switch circuit LIGHT CONTROL SWITCH CIRCUIT 
    3. Front fog light circuit FRONT FOG LIGHT CIRCUIT 
    4. Body ECU -
    Only one front fog light does not come on. 1. Bulb -
    2. Wire harness or connector -
  6. TURN SIGNAL AND HAZARD WARNING SYSTEM 
    PROBLEM SYMPTOMS TABLE - TURN SIGNAL AND HAZARD WARNING SYSTEM

    Symptom Suspected Area See
    Hazard warning light does not come on (Turn is normal). 1. Hazard warning switch circuit HAZARD WARNING SWITCH CIRCUIT 
    2. Turn signal flasher assembly TURN SIGNAL FLASHER ASSEMBLY 
    Turn signal light does not come on. 1. Light control switch circuit LIGHT CONTROL SWITCH CIRCUIT 
    2. Turn signal light circuit TURN SIGNAL LIGHT CIRCUIT 
    3. Body ECU -
    Only one bulb does not come on. 1. Bulb -
    2. Turn signal light circuit TURN SIGNAL LIGHT CIRCUIT 
  7. STOP LIGHT SYSTEM 
    PROBLEM SYMPTOMS TABLE - STOP LIGHT SYSTEM

    Symptom Suspected Area See
    Stop light does not operate (All). 1. Bulb -
    2. Stop light switch STOP LIGHT SWITCH 
    3. Wire harness or connector -
    Only one stop light does not come on. 1. Bulb -
    2. Wire harness or connector -
  8. ILLUMINATED ENTRY SYSTEM 
    PROBLEM SYMPTOMS TABLE - ILLUMINATED ENTRY SYSTEM

    Symptom Suspected Area See
    Illuminated entry of Multiplex network body ECU control does not operate (All). 1. Ignition switch circuit IGNITION SWITCH CIRCUIT 
    2. Door lock position circuit DOOR LOCK POSITION CIRCUIT 
    3. Door courtesy switch circuit DOOR COURTESY SWITCH CIRCUIT 
    4. Illumination circuit ILLUMINATION CIRCUIT 
    5. Body ECU -
  9. OTHERS 
    PROBLEM SYMPTOMS TABLE - OTHERS

    Symptom Suspected Area See
    Vanity light does not come on. 1. Bulb -
    2. Wire harness or connector -
    Back up light does not come on. 1. Bulb -
    2. Park / neutral position switch INSPECTION
    3. Wire harness or connector -
    Luggage compartment light does not come on. 1. Bulb -
    2. Luggage room light circuit LUGGAGE ROOM LIGHT CIRCUIT 
    3. Body ECU -
    Courtesy light does not come on. 1. Bulb -
    2. Door courtesy switch circuit DOOR COURTESY SWITCH CIRCUIT 
    3. Body ECU -
    Rear interior light does not come on. 1. Bulb -
    2. Rear room light assembly REAR ROOM LIGHT ASSEMBLY 
    3. Door courtesy switch circuit DOOR COURTESY SWITCH CIRCUIT 
    4. Wire harness or connector -
    5. Body ECU -
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