Quick Function Check For The Main-Beam Assistant
Communication between the main-beam assistant and the light module is checked as follows:
- Place the vehicle in a darkened room.
- Switch on the ignition.
- Use a black cloth to cover up the rain-light sensor.
- Turn the light switch to position "A". The green indicator light in the light switch comes on. The automatic headlight control switches on the low-beam headlights.
- Push the direction indicator/main-beam switch forward.
If the FLA indicator light comes on in the instrument cluster, communications between the control units are working correctly:
- Data transmission between the main-beam assistant and light module is working correctly.
- Data transmission between the light module and the instrument cluster is working correctly.
Test Procedure For The Main-Beam Assistant
The main-beam assistant is checked and adjusted as necessary with the test procedure (test module) in the BMW diagnosis system. The test procedure for the main-beam assistant comprises 3 sections:
- Checking main-beam assistant in diagnosis mode
- Resetting main-beam assistant to basic setting
- Adjusting main-beam assistant (only needed in exceptional circumstances)
Checking Main-Beam Assistant In Diagnosis Mode
The main-beam assistant can be subjected to an in-depth function test using the corresponding diagnosis mode set up in the BMW diagnosis system. Call up the test procedure "Check FLA".
The items required for the test are as follows:
- Clean, black cloth or other suitable item for covering the rain-light sensor
- Lamp for simulating oncoming traffic
The procedure for testing the main-beam assistant is as follows:
- Place the vehicle in a darkened room. Make sure that there are no light sources or reflective objects in front of the vehicle.
- Switch on the ignition.
- Use a black cloth to cover up the rain-light sensor.
- Turn the light switch to position "A".
The green indicator light in the light switch comes on.
The automatic headlight control switches on the low-beam headlights.
- Push the direction indicator/main-beam switch forward.
The FLA indicator light in the instrument cluster comes on.
Main-beam assistant test mode is started (in BMW diagnosis system test procedure).
The following situations are possible:
- The room is dark enough:
If the room is dark enough, the main-beam headlights will come on. The bi-xenon headlights are switched to full beam. The additional driving lights with the halogen bulbs are not switched on.
- If the room is not dark enough:
Hold your hand over the image sensor of the main-beam assistant. The main-beam headlights should come on automatically after a few seconds.
- Increase the level of brightness in the room or use a lamp held in front of the car to direct a beam of light toward the main-beam assistant.
The main-beam headlights should switch off when the beam of light is in the field of vision of the main-beam assistant or when the room is bright enough.
- Remove the beam of light from the field of vision of the main-beam assistant. If necessary, use your hand to exclude light from the main-beam assistant. The main-beam headlights must come on again:
The bi-xenon headlights are switched to full beam.
The additional driving lights with the halogen bulbs are not switched on.
- If the main-beam headlights are not switched on, the test procedure can send a switch-on recommendation to the light module (via the main-beam assistant).
The vehicle has to be prepared as described above, in order to ensure that the light module accepts the switch-on recommendation and switches on the main-beam headlights:
- Switch on the ignition.
- Use a black cloth to cover up the rain-light sensor.
- Turn the light switch to position "A".
The automatic headlight control switches on the low-beam headlights.
The green indicator light in the light switch comes on.
- Push the direction indicator/main-beam switch forward. The FLA indicator light in the instrument cluster must come on.