Fog Lamps

The fog lamps are activated by a fog lamp switch located in the headlamp switch assembly. This is a momentary switch that sends an analog command to the BCM for fog lamp operation ON or OFF commands. If the BCM receives a short circuit, open circuit or switch stuck input from the fog lamp switch, the BCM will set the appropriate DTC.

If the vehicle is equipped with halogen fog lamps, the BCM provides a PWM output to the fog lamps.

Cornering Lights - The Cornering Lights function comprises two algorithms, one based on the steering angle or one based on the turn lights. Both functionalities are be used when the cornering lights function is active. In case a conflict arises between the two, the functionality based on the steering angle is given priority to the expense of the strategy based on the turn lights.

For steering angle, the BCM looks at the actual angle to determine when to turn on the cornering lamp. The average steering able resting range is 100 degrees. The minimum angle threshold is 40 degrees or lower while the maximum is 160 degrees or higher. When the steering angle meets the minimum or maximum threshold, the cornering lamps are activated until the angle falls back within the normal range.

For the turn signal strategy, the fog lamps are activated according to the status of the signal lamps. When the turn signal lamps are active, so is the respective side cornering lamp.

The cornering lamps have requirements to be met before they will operate. Those requirements are:

• Ignition RUN state
• Low beam headlamps ON
• Steering angle sensor status is reporting that it is operational with no faults
• Hazard switch is OFF
• Vehicle wheel speed signal is valid and available to be read
• Vehicle wheel speed is at or below 40 km/h (25 mph)
• The fog lamps are not activated
• The transmission is not engaged in R  everse or P  ark
• The park brake is not engaged