Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Smart Lighting Module
| 1 - SLM |
The Smart Lighting Module (SLM) are located on the back of each sides of the front lamp units. They are Controller Area Network-Flexible Data (CAN-FD) Bus modules that control the front exterior lighting functions, which includes the headlamps, daytime running lamps (DRLs), turn lamps, park lamps and fog lamps.
When the Body Control Module (BCM) receives front exterior lighting requests, the BCM sends a CAN-FD Bus message to the Smart Lighting Modules (SLMs), through the CAN-FD4 Bus. The SLMs then activates the requested lamps in the front lamp units or sidemarker lamps.
The SLMs are serviced separately from the front lamp units. For additional information on the exterior lamps and lighting system. Refer to EXTERIOR LAMPS AND LIGHTING, DESCRIPTION AND OPERATION .
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.