Principles of Operation

NOTE: The Smart Junction Box (SJB) is also known as the Generic Electronic Module (GEM).

The fog lamps are utilized as the Daytime Running Lamps (DRL). The SJB controls the DRL by using various inputs to determine whether or not the DRL should be illuminated. These inputs include:

Ignition switch position
Headlamp switch position
Headlamps on or off
Transaxle gear selection

When the DRL is active, the SJB energizes the fog lamp relay. This illuminates the fog lamps at full intensity.