Problem Symptoms Table
WARNING: This page is about a different car, the 2006 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
- HEADLAMP AND TAIL LAMP PROBLEM SYMPTOMS TABLE
Symptom Suspected Area Reference Only one headlamp comes on. 1. Bulb - 2. HEAD LH fuse (LWR, UPR) - 3. HEAD RH fuse (LWR, UPR) - 4. Harness or connector - Headlamp does not light up. - HEADLAMP DOES NOT LIGHT UP "HI-Beam" does not light (All). 1. Headlamp dimmer switch INSPECTION 2. Harness or connector - "HI-Beam" does not light (One side). 1. Bulb - 2. Harness or connector - "Flash" does not light. 1. Headlamp Dimmer Switch INSPECTION 2. Turn signal flasher relay INSPECTION 3. Harness or connector - Headlamp is dark. 1. Bulb - 2. Harness or connector - Only one tail lamp light up. 1. Bulb - 2. Harness or connector - Tail lamp does not light up.
(Headlamp is normal)- TAIL LAMP DOES NOT LIGHT UP Tail lamp does not light up.
(Headlamp does not light)1. Light Control Switch INSPECTION 2. Harness or connector - Rear combination light does not light up. 1. Bulb - 2. Harness or connector - Headlamp does not light up with engine running and light control switch is in OFF (Day time running light operation). 1. Turn signal flasher and DRL relay INSPECTION 2. Generator L terminal - 3. Parking brake switch - 4. Multiplex network body ECU MULTIPLEX NETWORK BODY ECU 5. Harness or connector - - AUTOMATIC LIGHT CONTROL SYSTEM PROBLEM SYMPTOMS TABLE
Symptom Suspected Area Reference Automatic light control system does not operate - AUTOMATIC LIGHT CONTROL SYSTEM DOES NOT OPERATE - LIGHT AUTO CUT SYSTEM PROBLEM SYMPTOMS TABLE
Symptom Suspected Area Reference Light auto turn off system does not operate. - LIGHT AUTO TURN OFF SYSTEM DOES NOT OPERATE Headlamp and tail lamp do not come on. 1. Multiplex network body ECU MULTIPLEX NETWORK BODY ECU 2. Harness or connector - Headlamp and taillight stay on. 1. Multiplex network body ECU MULTIPLEX NETWORK BODY ECU 2. Harness or connector - - FOG LAMP SYSTEM PROBLEM SYMPTOMS TABLE
Symptom Suspected Area Reference Front fog lamp does not light up with light control SW HEAD (Headlamp is normal). 1. FOG Fuse - 2. FOG relay - 3. Fog lamp switch INSPECTION 4. Harness or connector - Only one front fog lamp does not light up. 1. Bulb - 2. Harness or connector - - TURN SIGNAL AND HAZARD WARNING SYSTEM PROBLEM SYMPTOMS TABLE
Symptom Suspected Area Reference "Hazard" and "Turn" do not light up. 1. IG1 Fuse - 2. Ignition switch - 3. Turn signal flasher ON-VEHICLE INSPECTION 4. Harness or connector - Hazard warning light does not light up.
(Turn is normal)1. Hazard warning switch INSPECTION 2. Harness or connector - Turn signal does not light up.
(Hazard is normal)1. Turn signal switch INSPECTION 2. Harness or connector - Turn signal does not light up in one direction. 1. Turn signal switch INSPECTION 2. Harness or connector - Only one bulb does not light up. 1. Bulb - 2. Harness or connector - - ILLUMINATED ENTRY SYSTEM PROBLEM SYMPTOMS TABLE
Symptom Suspected Area Reference Room lamp assy no. 1 does not light up. - ROOM LAMP ASSY NO. 1 DOES NOT LIGHT UP . Room lamp assy no.1 does not go off. - ROOM LAMP ASSY NO.1 DOES NOT GO OFF. Courtesy lamp does not light up. 1. Courtesy lamp - 2. Courtesy lamp switch - 3. Harness or connector - 4. Driver side junction block assy - Courtesy lamp does not go off. 1. Courtesy lamp switch - 2. Harness or connector - 3. Courtesy lamp - 4. Driver side junction block assy - Side step lamp does not light up. 1. Side step lamp - 2. Courtesy lamp switch - 3. Harness or connector - 4. Multiplex network body ECU - Side step lamp does not go off. 1. Courtesy lamp switch - 2. Harness or connector - 3. Side step lamp - 4. Multiplex network body ECU -