Upgrading your BMW E66 with LED lights can bring a modern look and improved visibility. However, many owners encounter an annoying issue: flickering LED lights. This problem often arises due to the BMW E66’s voltage monitoring system, which is designed for traditional halogen bulbs. Fortunately, with Carly E66 Bmw Coding, you can easily disable this voltage monitoring and eliminate the flickering. This guide will walk you through understanding and disabling voltage monitoring using the Carly app, ensuring your LED upgrade is smooth and flicker-free.
Understanding Voltage Monitoring in Your BMW E66
Modern vehicles like the BMW E66 are equipped with sophisticated systems to monitor the functionality of various components, including exterior lights. This voltage monitoring system detects changes in electrical current to determine if a bulb is functioning correctly. Halogen bulbs, which were standard in the E66 era, have different electrical characteristics compared to LED bulbs.
When you install LEDs, the car’s system might perceive the lower power draw of LEDs as a malfunction. This misinterpretation triggers the voltage monitoring system, leading to a rapid on-off cycle of power to the LEDs, which we observe as flickering. This is not an actual fault with the LEDs themselves but rather a compatibility issue with the car’s monitoring system.
To resolve this, we need to tell the car’s computer to ignore the voltage fluctuations from the LED lights. This is where Carly E66 BMW coding comes into play. By accessing specific coding parameters, we can disable the voltage monitoring for the lights you’ve upgraded to LED.
Using Carly for BMW E66 Coding
Carly is a popular and user-friendly OBD-II adapter and app that allows BMW owners to perform various diagnostic and coding functions, right from their smartphone. It simplifies complex car modifications, making them accessible even to those without extensive technical knowledge. For Carly E66 BMW coding, specifically disabling voltage monitoring, the process is straightforward and can be completed in minutes.
The coding parameters for voltage monitoring are typically found within the GBDCMAIN module of your BMW E66’s ECU (Electronic Control Unit). Carly provides an intuitive interface to navigate to this module and modify the relevant settings.
Step-by-Step Guide: Disabling Voltage Monitoring with Carly
Using Carly, you can disable voltage monitoring for various light types on your BMW E66. Here’s a breakdown of the settings you’ll likely encounter and how to adjust them to eliminate LED flickering. You will typically find these settings within the “Light Coding” or similar section in the Carly app after connecting to your E66 and selecting the GBDCMAIN module.
Low Beams
For the low beam headlights, you will find the following settings for both the left and right sides:
Low beams left voltage monit. 1/2
- on (Default – Voltage monitoring is active)
- off (Disable voltage monitoring)
Low beams left voltage monit. 2/2
- on (Default – Voltage monitoring is active)
- off (Deactivates voltage monitoring – should be set to ‘off’ if 1/2 is set to ‘off’)
Low beams right voltage monit. 1/2
- on (Default – Voltage monitoring is active)
- off (Disable voltage monitoring)
Low beams right voltage monit. 2/2
- on (Default – Voltage monitoring is active)
- off (Deactivates voltage monitoring – should be set to ‘off’ if 1/2 is set to ‘off’)
To disable voltage monitoring for the low beams, set both “1/2” and “2/2” options to off for both the left and right sides.
High Beams
Similar to low beams, you’ll find voltage monitoring settings for high beams:
High beams left voltage monit. 1/2 & High beams left voltage monit. 2/2
High beams right voltage monit. 1/2 & High beams right voltage monit. 2/2
Again, set both “1/2” and “2/2” options to off for both left and right high beams to disable voltage monitoring.
Turn Signals (Front and Rear)
If you’ve upgraded your turn signals to LEDs and are experiencing flickering, you’ll need to disable voltage monitoring for these as well:
Turn signals front left voltage monit. 1/2 & Turn signals front left voltage monit. 2/2
Turn signals front right voltage monit. 1/2 & Turn signals front right voltage monit. 2/2
Turn signals rear left voltage monit. 1/2 & Turn signals rear left voltage monit. 2/2
Turn signals rear right voltage monit. 1/2 & Turn signals rear right voltage monit. 2/2
Disable voltage monitoring by setting both “1/2” and “2/2” options to off for all front and rear turn signals. Additionally, you might see warning settings which can also be turned off if you are still getting error messages after disabling voltage monitoring:
Turn signals front left warning
- on (Default – Warning for malfunction is active)
- off (Disable malfunction warning)
Turn signals front right warning
- on (Default – Warning for malfunction is active)
- off (Disable malfunction warning)
Fog Lights and Daytime Running Lights
For front fog lights and daytime running lights, the process remains the same:
Front fog lights left voltage monit. 1/2 & Front fog lights left voltage monit. 2/2
Front fog lights right voltage monit. 1/2 & Front fog lights right voltage monit. 2/2
Daytime running lights left voltage monit. 1/2 & Daytime running lights left voltage monit. 2/2
Daytime running lights right voltage monit. 1/2 & Daytime running lights right voltage monit. 2/2
Set both “1/2” and “2/2” options to off for both left and right fog lights and daytime running lights.
Rear Lights (Standing, Reversing, Fog, Brake, License Plate)
The voltage monitoring settings extend to various rear lights as well:
Standing lights outer rear left voltage monit. 1/2 & Standing lights outer rear left voltage monit. 2/2
Standing lights outer rear right voltage monit. 1/2 & Standing lights outer rear right voltage monit. 2/2
Standing lights inner rear left voltage monit. 1/2 & Standing lights inner rear left voltage monit. 2/2
Standing lights inner rear right voltage monit. 1/2 & Standing lights inner rear right voltage monit. 2/2
Reversing lights left voltage monit. 1/2 & Reversing lights left voltage monit. 2/2
Reversing lights right voltage monit. 1/2 & Reversing lights right voltage monit. 2/2
Rear fog light left voltage monit. 1/2 & Rear fog light left voltage monit. 2/2
Rear fog light right voltage monit. 1/2 & Rear fog light right voltage monit. 2/2
Brake lights left voltage monit. 1/2 & Brake lights left voltage monit. 2/2
Brake lights right voltage monit. 1/2 & Brake lights right voltage monit. 2/2
Third brake light voltage monit. 1/2 & Third brake light voltage monit. 2/2
License plate lighting voltage monit. 1/2 & License plate lighting voltage monit. 2/2
For all these rear light types, disable voltage monitoring by setting both the “1/2” and “2/2” options to off for both left and right sides (where applicable).
Conclusion: Enjoy Flicker-Free LED Lights on Your BMW E66
By using Carly E66 BMW coding to disable voltage monitoring, you can effectively eliminate the flickering issues associated with LED upgrades on your BMW E66. This simple modification ensures your new LED lights function correctly and provide the aesthetic and performance benefits you expect. Remember to always double-check your settings in the Carly app and ensure you are modifying the correct parameters within the GBDCMAIN module. With Carly, upgrading your BMW E66 to LED lighting is not only stylish but also hassle-free.
