Audi A6 (4G/4H) MxB-ECU Headlight Regulation

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This page applies to vehicles using MxB-ECU. This can be identified by evaluating the data in the Auto-Scan: 

Address 55: Headlight Range (J745)       Labels:| 4H4-907-357-V2.clb
   Part No SW: 4H4 907 357 E    HW: 7P6 907 357 B
   Component: MxB-ECU       001 0100  
   ASAM Dataset: EV_HeadlRegulAUDIMXBAU64X 005009
   ROD: EV_HeadlRegulAUDIMXBAU64X_005_AU57.rod


Coding

Coding information is available while connected to the vehicle with VCDS using the Long Coding Helper.

Adaptation

Adaptation channels are available in the form of a drop-down menu when connected to the vehicle with VCDS.

Security Access

The Security Access code will appear in a pop-up balloon.

Basic Setting

Headlight Adjustment

Prerequisites:

  • Vehicle must be parked on level ground and settled on its suspension

[Select]
[55 - Xenon Range]
[Basic Settings - 04]
Select Basic headlamp setting from the drop-down menu.
[Go!] to activate the Basic Setting.

  • The meas. block field will show Running.
  • Adjust the headlights using their manual adjusting screws as referenced against a suitable aiming target.

[Stop] after any needed mechanical adjustments are completed.

Select Acknowledge basic setting
[Go!] to activate the Basic Setting.
The adjustment should now be learned.
[Stop]
[Done, Go Back]
Don't forget to check/clear fault codes afterwards.
[Close Controller, Go Back - 06]

Special Notes

  • If Coding is not possible after used replacement headlight components are installed in conjunction with DTCs such as:
    • U1014/13636608 - Control Module Incorrectly Coded
    • C107E/5275220 - Headlight - Missing Calibration / Basic Setting
    • B149C/5545201 - Output Stage for LED Headlamp; Left - Incorrectly Coded
    • C116F/5538066 - Temperature Sensor for Left High Beam - Electrical Failure
    • B1219/5538067 - Bulb for High Beam Headlamp; Left - Current Coding Electrical Error

it may be necessary to re-code Address 09 (BCM1) to the same value first. Doing so appears to refresh the left and right Subsystem coding values making them compatible with the 55 module as per the feedback in this thread: https://forums.ross-tech.com/showthread.php?23400-Audi-a6-Headlight-slave-unit-recode

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