TROUBLESHOOTING
When the front fog lamp switch is turned to ON with the tail lamp or the headlamp on (the tail lamp switch or the headlamp switch is ON), the fog lamp relay turns on, and the fog lamps will illuminate.
If the tail lamps or the headlamps are turned off with the lighting switch OFF while the fog lamps are on, the front fog lamps turn off at the same time to prevent unattended operation.
If the tail lamps are turned off by the headlamp automatic shutdown function, the fog lamps turn off at the same time. However, if the tail lamps illuminate again, the fog lamps do not.
The front fog lamps are controlled by the ETACS-ECU. For troubleshooting, refer to GROUP 54B, Troubleshooting 
.