Body Electrical. Lexus Gs430, Gs300. Uzs190 Grs190
Lighting. Lexus Gs430, Gs300. Uzs190 Grs190
Lighting System -- Problem Symptoms Table |
| Symptom | Suspected area | See page |
| "LO-beam" headlight does not illuminate | Light control switch circuit | Click here |
| Headlight relay circuit | Click here | |
| Headlight signal circuit | Click here | |
| Multiplex network body ECU (Cowl side junction block ECU RH) | - | |
| Combination switch assembly (Windshield wiper switch) | - | |
| Engine room No. 2 relay block (Front controller) | - | |
| "HI-beam" headlight does not illuminate | Headlight (HI-BEAM) circuit | Click here |
| Headlight signal circuit | Click here | |
| Light control switch circuit | Click here | |
| Multiplex network body ECU (Cowl side junction block ECU RH) | - | |
| Combination switch assembly (Windshield wiper switch) | - | |
| Engine room No. 2 relay block (Front controller) | - | |
| "Flash" headlight does not illuminate | Headlight (HI-BEAM) circuit | Click here |
| Headlight signal circuit | Click here | |
| Light control switch circuit | Click here | |
| Multiplex network body ECU (Cowl side junction block ECU RH) | - | |
| Combination switch assembly (Windshield wiper switch) | - | |
| Engine room No. 2 relay block (Front controller) | - | |
| Headlight is dark | Headlight signal circuit | Click here |
| Multiplex network body ECU (Cowl side junction block ECU RH) | - | |
| Combination switch assembly (Windshield wiper switch) | - | |
| Engine room No. 2 relay block (Front controller) | - | |
| Headlight does not illuminate or has abnormal operation | Headlight relay circuit | Click here |
| Headlight signal circuit | Click here | |
| Light control switch circuit | Click here | |
| Multiplex network body ECU (Cowl side junction block ECU RH) | - | |
| Combination switch assembly (Windshield wiper switch) | - | |
| Engine room No. 2 relay block (Front controller) | - | |
| Taillight does not illuminate or has abnormal operation | Taillight circuit | Click here |
| Multiplex network rear ECU (Luggage room junction block ECU) | - | |
| Both left and right headlight do not illuminate | Headlight (HI-BEAM) circuit | Click here |
| Headlight relay circuit | Click here | |
| Light control switch circuit | Click here | |
| Headlight signal circuit | Click here | |
| Combination switch assembly (Windshield wiper switch) | - | |
| Engine room No. 2 relay block (Front controller) | - | |
| Multiplex network body ECU (Cowl side junction block ECU RH) | - | |
| Headlight beam level control system does not operate | Headlight beam level control actuator circuit | Click here |
| Height control sensor circuit | Click here | |
| AFS ECU | - | |
| Cowl side junction block ECU LH | - |
| Symptom | Suspected area | See page |
| Stop light system does not illuminate | Stop light circuit | Click here |
| Multiplex network rear ECU (Luggage room junction block ECU) | - | |
| Hi-mounted stop light does not illuminate | Stop light circuit | Click here |
| Multiplex network rear ECU (Luggage room junction block ECU) | - |
| Symptom | Suspected area | See page |
| Front fog light does not illuminate or has abnormal operation | Front fog light circuit | Click here |
| Light control switch circuit | Click here | |
| Headlight signal circuit | Click here | |
| Combination switch assembly (Windshield wiper switch) | - | |
| Engine room No. 2 relay block (Front controller) | - | |
| Multiplex network body ECU (Cowl side junction block ECU RH) | - | |
| Rear fog light does not illuminate or has abnormal operation | Rear fog light circuit | Click here |
| Light control switch circuit | Click here | |
| Combination switch assembly (Windshield wiper switch) | - | |
| Engine room No. 2 relay block (Front controller) | - | |
| Multiplex network rear ECU (Luggage room junction block ECU) | - |
| Symptom | Suspected area | See page |
| Hazard warning light does not illuminate | Hazard warning switch circuit | Click here |
| Turn signal flasher | - | |
| Multi-display (Hazard warning switch) | - | |
| Turn signal light does not illuminate | Turn signal light circuit | Click here |
| Light control switch circuit | Click here | |
| Combination switch assembly (Windshield wiper switch) | - | |
| Engine room No. 2 relay block (Front controller) | - | |
| Cowl side junction block ECU LH | - |
| Symptom | Suspected area | See page |
| Door courtesy light does not illuminate | Door courtesy switch circuit | Click here |
| Door courtesy light circuit | Click here | |
| Multiplex network body ECU (Cowl side junction block ECU RH) | - | |
| Multiplex network door ECU front LH (Front side door ECU LH) | - | |
| Multiplex network door ECU front RH (Front side door ECU RH) | - | |
| Multiplex network door ECU rear LH (Rear door ECU LH) | - | |
| Multiplex network door ECU rear RH (Rear door ECU RH) | - | |
| Luggage room light does not illuminate | Luggage room light circuit | Click here |
| Cowl side junction block ECU LH | - | |
| Room light does not illuminate | Room light circuit | Click here |
| Map light assembly (Overhead junction block) | - | |
| Cowl side junction block ECU LH | - | |
| Step illumination does not illuminate | Step illumination circuit | Click here |
| Door courtesy switch circuit | Click here | |
| Multiplex network body ECU (Cowl side junction block ECU RH) | - | |
| Inside handle illumination light does not illuminate | Inside handle illumination light circuit | Click here |
| Door courtesy switch circuit | Click here | |
| Multiplex network door ECU front LH (Front side door ECU LH) | - | |
| Multiplex network door ECU front RH (Front side door ECU RH) | - | |
| Multiplex network door ECU rear LH (Rear door ECU LH) | - | |
| Multiplex network door ECU rear RH (Rear door ECU RH) | - |
| Symptom | Suspected area | See page |
| Back-up light does not illuminate | Back-up light circuit | Click here |
| Multiplex network rear ECU (Luggage room junction block ECU) | - | |
| License plate light does not illuminate | Taillight circuit | Click here |
| Light control switch circuit | Click here | |
| Combination switch assembly (Windshield wiper switch) | - | |
| Engine room No. 2 relay block (Front controller) | - | |
| Multiplex network rear ECU (Luggage room junction block ECU) | - | |
| Clearance light does not illuminate | Taillight circuit | Click here |
| Light control switch circuit | Click here | |
| Combination switch assembly (Windshield wiper switch) | - | |
| Engine room No. 2 relay block (Front controller) | - |
| Symptom | Suspected area | See page |
| AFS does not operate *1 | AFS ECU | Click here |
| Only one swivel motor is not initialized *1 | Headlight assembly or swivel motor stuck *2 | - |
| Headlight swivel motor malfunction | - | |
| AFS ECU | Click here | |
| Only swivel control does not operate or malfunction | AFS ECU switch status *3 | - |
| Steering control ECU | - | |
| Vehicle speed sensor malfunction | - | |
| BEAN communication malfunction | - | |
| Headlight swivel motor malfunction | - | |
| AFS ECU | Click here | |
| Swivel control and leveling control do not operate | Height control sensor malfunction | - |
| Headlight swivel motor malfunction | - | |
| AFS ECU | Click here | |
| AFS OFF indicator light does not come on | BEAN communication malfunction | - |
| Combination meter assembly | - | |
| AFS ECU | Click here |
- HINT:
- *1: When the AFS indicator light does not come on or blink despite the symptom being indicated, check the battery voltage.
- *2: Check if the headlight swivel motor turns smoothly by hand. If the motor does not turn, replace it with a new one. If the motor still does not turn, replace the headlight assembly with a new one.
- *3: Before the procedure, check that the AFS OFF switch is not pushed.