Problem Symptoms Table
WARNING: This page is about a different car, the 2004 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
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 figure Fig 1 below and proceed to the relevant troubleshooting ?
HINT:
Inspect the fuse and relay before confirming the suspected area in the figure Fig 1 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.
- HEADLAMP SYSTEM
- TAILLAMP SYSTEM
- AUTOMATIC LIGHT CONTROL SYSTEM
- LIGHT AUTO TURN OFF SYSTEM
- FOG LAMP SYSTEM
- TURN SIGNAL AND HAZARD WARNING SYSTEM
- STOP LAMP SYSTEM
- BACK UP LAMP SYSTEM
- ILLUMINATED ENTRY SYSTEM
- STEP ILLUMINATION SYSTEM
- BUCKLE ILLUMINATION SYSTEM
- INSTRUMENT PANEL ILLUMINATION SYSTEM
- LUGGAGE ROOM LIGHT SYSTEM
- AFS
- OTHERS