Body Electrical and ADAS
9 LessonsLighting, windows, locks, ADAS calibration, and the growing world of body electronics.
Overview
Body electrical systems include everything the customer touches — lights, windows, locks, mirrors, seats, and the increasingly complex Advanced Driver Assistance Systems (ADAS). This module covers body control modules, multiplexing, CAN bus communication, and the calibration requirements for ADAS features like lane departure and automatic emergency braking.
Key Components
- Body Control Module (BCM)
- CAN bus network
- Lighting systems (LED, HID, adaptive)
- ADAS sensors (radar, camera, lidar)
- Window, lock, and mirror motors
How It Works
Modern vehicles use networked communication (CAN bus) instead of individual wires for each function. The BCM manages most body functions and communicates with other modules. ADAS systems use cameras and radar to monitor the environment and assist (or override) the driver.
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Join the Nation — FreeCommon Problems
- CAN bus communication errors from damaged wiring
- ADAS calibration needed after windshield replacement
- BCM programming issues after battery disconnect
- LED driver module failure
- Window regulator motor burnout
Diagnostic Tips
- Network test — check for U-codes in all modules
- ADAS calibration requires specific conditions and targets
- Check CAN bus termination resistance (should be ~60 ohms)
- Battery voltage affects module communication — always check first
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