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.
2008 BMW 528i StandardFACTORY OEM SERVICE PROCEDURE
System Overview
INDEX EXPLANATION CHART
| Index | Explanation |
|---|---|
| 1 | FLA Control Unit |
| 2 | Footwell Module |
| 3 | Instrument Cluster |
| 4 | Headlight |
| 5 | Reverse Gear Switch |
| 6 | Direction Indicator/High Beam Switch |
| 7 | Light Switch |
| 8 | Rain/Light/Solar Sensor |
| 9 | Wheel Speed Sensor |
| 10 | DSC Sensor |
| 11 | Image Sensor |
INDEX EXPLANATION CHART
| Index | Explanation |
|---|---|
| 1 | High Beam Headlight, Left |
| 2 | High Beam Headlight, Right |
| 3 | Instrument Cluster |
| 4 | Housing of Interior Rear-view Mirror |
| 5 | Camera for High Beam Assistant |
| 6 | High Beam Assistant Control Unit |
| 7 | Junction Box Control Unit |
| 8 | Steering Column Stalk, High Beam Headlight |
| 9 | Steering Column Switch Cluster |
| 10 | Light Switch |
| 11 | Footwell Module |
| K-CAN | Body CAN |
| PT_CAN | Powertrain CAN |
K-CAN SIGNALS AT CONTROL UNIT OF FOOTWELL MODULE
| K-CAN Signals at Control Unit of Footwell Module | |||
|---|---|---|---|
| In/Out | Signal | Source | Function |
| In | Position "A" (Automatic) on light switch | > Light switch > Footwell module |
High beam assistance possible only in Automatic position |
| In | High beam/low beam | > Steering column stalk, high beam > Footwell module |
Activation of high beam assistant system |
| In | Reverse gear | > EGS | Deactivation of high beam assistant |
| In | Brightness level of ambient light | > Rain/light/solar sensor >Roof function Center |
Precondition: activation of high beam headlight |
| Out | High beam headlight on/off | > High beam | High beam switched on and off by footwell module |
| Out | Indicator lamp | > Instrument cluster | Activation of indicator lamp for high beam assistant |
K-CAN SIGNALS AT CONTROL UNIT FOR HIGH BEAM ASSISTANT
| K-CAN Signals at Control Unit for High Beam Assistant | |||
|---|---|---|---|
| In/Out | Signal | Source | Function |
| In | Road Speed | > Wheel speed sensors > DSC |
Deactivation of high beam assistant below certain speed |
| In | Yaw Rate | > DSC Sensor > DSC |
Adaptation of detection range when cornering |
| In | Bulb Condition | > Footwell Module | Monitoring condition of high beam on/off |
| Out | Switch-on and switch-off recommendation | > Footwell Module | Switch-on and switch-off recommendation to footwell module - footwell module decides whether system is switched on or off |
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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