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Problem Symptoms Table

WARNING: This page is about a different car, the 2005 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

Proceed to troubleshooting of each circuit in the table below .

  1. HEADLAMP AND TAIL LAMP SYSTEM 
    PROBLEM SYMPTOMS TABLE - HEADLIGHT AND TAILLIGHT SYSTEM

    Symptom Suspect Area
    Only one headlamp comes on.
    1. Bulb
    2. H-LP LL, H-LP RL fuse
    3. Light control ECU (w/HID)
    4. Harness or connector
    Headlamp does not come on.
    1. H-LP LL, H-LP RL fuse
    2. Headlight relay circuit
    3. Light control switch circuit
    4. Ignition switch circuit
    5. Door lock position circuit
    6. Door courtesy switch circuit
    7. Wireless door lock system
    8. Instrument panel junction block assy
    "Hl-Beam" does not come on (All).
    1. Bulb
    2. H-LP LH, H-LP RH fuse
    3. DRL fuse
    4. DRL relay circuit
    5. Light control switch circuit
    6. Instrument panel junction block assy
    "Hl-Beam" does not come on (One side).
    1. Bulb
    2. Harness or connector
    "Flash" does not come on. (Headlamp and Hi-Beam is normal)
    1. Light control switch circuit
    2. Instrument panel junction block assy
    Headlamp is dark.
    1. Bulb
    2. Harness or connector
    Tail lamp does not come on (All).
    1. TAIL fuse
    2. Light control switch circuit
    3. TAIL relay circuit
    4. Ignition switch circuit
    5. Door courtesy switch circuit
    6. Door lock position circuit
    7. Wireless door lock system
    8. Instrument panel junction block assy
    Only one tail lamp comes on.
    1. Bulb
    2. Harness or connector
    Rear combination light does not come on.
    1. Bulb
    2. Harness or connector
    Daytime running light system does not operate.
    1. Light control switch circuit
    2. Generator signal circuit
    3. Parking brake switch circuit
    4. Ignition switch circuit
    5. DRL relay circuit
    6. Instrument panel junction block assy
  2. AUTOMATIC LIGHT CONTROL SYSTEM 
    PROBLEM SYMPTOMS TABLE - AUTOMATIC LIGHT CONTROL SYSTEM

    Symptom Suspect Area
    Automatic light control system does not operate.
    1. Light control switch circuit
    2. Ignition switch circuit
    3. Automatic light control sensor circuit
    4. Instrument panel junction block assy
  3. LIGHT AUTO TURN OFF SYSTEM 
    PROBLEM SYMPTOMS TABLE - LIGHT AUTO TURN OFF SYSTEM

    Symptom Suspect Area
    Light auto turn off system does not operate.
    1. Light control switch circuit
    2. Ignition switch circuit
    3. Door lock position circuit
    4. Door courtesy switch circuit
    5. Wireless door lock system
    6. Instrument panel junction block assy
  4. FOG LAMP SYSTEM 
    PROBLEM SYMPTOMS TABLE - FOG LAMP SYSTEM

    Symptom Suspect Area
    Front fog lamp does not come on with light control switch in HEAD position.
    1. FOG fuse
    2. FOG relay
    3. Light control switch circuit
    4. Front fog light circuit
    5. Instrument panel junction block assy
    Only one front fog lamp does not come on.
    1. Bulb
    2. Harness or connector
  5. TURN SIGNAL AND HAZARD WARNING SYSTEM 
    PROBLEM SYMPTOMS TABLE - TURN SIGNAL AND HAZARD WARNING SYSTEM

    Symptom Suspect Area
    "Hazard" and "Turn" do not come on.
    1. HAZ fuse
    2. GAUGE fuse
    3. IG1 relay
    4. Ignition switch
    5. Turn signal flasher relay
    6. Harness or connector
    Hazard warning light does not come on. (Turn is normal)
    1. Hazard warning switch
    2. Harness or connector
    Turn signal does not come on. (Hazard is normal)
    1. Headlamp dimmer switch (turn signal switch)
    2. Harness or connector
    Turn signal does not come on in one direction.
    1. Headlamp dimmer switch (turn signal switch)
    2. Harness or connector
    Only one bulb does not come on.
    1. Bulb
    2. Harness or connector
  6. ILLUMINATED ENTRY SYSTEM 
    PROBLEM SYMPTOMS TABLE - ILLUMINATION

    Symptom Suspect Area
    Illumination lamp of Multiplex body ECU control does not come on.
    1. Ignition switch circuit
    2. Door lock position circuit
    3. Door courtesy switch circuit
    4. Illumination circuit
    5. Instrument panel junction block assy
    Illumination lamp of Multiplex body ECU control does not go off.
    1. Ignition switch circuit
    2. Door lock position circuit
    3. Door courtesy switch circuit
    4. Illumination circuit
    5. Instrument panel junction block assy
  7. OTHERS 
    PROBLEM SYMPTOMS TABLE - LIGHTING SYSTEM (OTHERS)

    Symptom Suspect Area
    Vanity light does not operate.
    1. Bulb
    2. Harness or connector
    Instrument panel illumination does not operate (All).
    1. TAIL relay
    2. PANEL fuse
    3. Harness or connector
    Stop light does not operate (All).
    1. STOP fuse
    2. Stop light switch
    3. BRK relay (w/Dynamic loser cruise control system)
    4. Harness or connector
    Back up lamp does not come on (All).
    1. GAUGE fuse
    2. IG1 relay
    3. Park/neutral position switch
    4. Harness or connector
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