Trouble unlocking hidden OBC functions General E46 Forum. OBC should show "Test" 3. Use Trip Reset to select function that unlocks all the features 3. Wait for display to show "Off" 4. Depress Trip Reset for 1/4 second and .. Unlock and TEST your BMW E46 3 Series OBC Hidden Functions DIY. Feb 14, The BMW 3 Series, better known as the E46 is one well built german car with what seems to be a lot of hidden features that are not that obvious. Over here we mention some tips and tricks to unlock these hidden functions. Please be careful when attempting some features, everything done would. Hi all, Came across this interesting video on youtube - shows hidden test functions - this one shows how to test your battery is charging e. com/watch?v=ImCUQjmMh re=related does anyone know what other functions can be tested? Send this user an email Send this user a private.
Unlock and TEST your BMW E46 3 Series OBC Hidden Functions DIY - Printable Version +- BMWFanatics Forum () +-- Forum: General Forum (/?fid=12) + Forum: General BMW Chat (/ ?fid=14) + Thread: Unlock and TEST your BMW E Give it a try!:) BMW Self-Test Mode Instructions: Instructions to access the hidden functions: 1. Hold Trip Reset while turning ignition key to position 1. 2. LCD should show "Test " 3. BMW E46 On-Board Computer (OBC) Hidden Codes (works on some E36s as well): 1. Car Engine and cluster data.