E34 hidden OBC functions

Roundal

New member
Rick unlocked this magical world for me on Saturday - thanks Rick.

Getting into the Test Codes:
============================
Push OBC buttons 1000 and 10 together. You will see the word Test. By pressing a combination of the 10 and 1's you can enter Test Codes from 1 to 21. After entering the number press R/S and you will get a continuous display of the test function. To cancel, just press any of the OBC function keys.

List of Available Tests:
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Test Number Description
1 Display Test (all LCDs and LEDs activate)
2 Current Consumption in litres / 100 km
3 Current Consumption in litres / hour
4 Average consumption (used in calculating range)
5 Current Range
6 Not used (this function is active on some, but not sure of the purpose)
7 Fuel Remaining in Tank (litres)
8 Current speed (km/h)
9 System Voltage at Terminal R
10 Country / Language
11 Units / am.pm
12 Average speed (km/h) for calculating ETA
13 ETA
14 Date of software / mask of OBC
15 Production Diagnosis
16 Production Diagnosis
17 Display Vehicle Specific Data
18 Alarm Changeover (continuous vs. intermittent)
19 Lock / Unlock all functions (Sum of month and date to unlock or lock)
20 Correction Factor for OBC Fuel Consumption
21 Reset all defect codes, date and time

!!! You need to unlock the OBC before you can change the settings. !!!

How to lock and unlock the OBC:
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To unlock the OBC, first press the date key, and add the month and day together. So, if the date is displayed as "0704", the result is "11".

Go to test 19 by pressing the 1000 and 10 buttons together, and then typing in the test number (19)·

You will see the word "LOCK" displayed. Type in the result from step 1 above, and press S/R·

If you display test 19 again, it will now display "FREI", indicating the system is now unlocked.

To lock the system again, go to test 19, and press the little button on the top left hand corner of the OBC (F/C).

 

maximus

///Member
Need to either fix mine or get a used one (hopefully they reset it, so its unlocked).

Would love to finally know how good/bad my fuel consumption is :rollsmile:

Oh, there's also an Immobilizing function as well :dunno:
 

Hellas

///Member
Roundal said:
To unlock the OBC, first press the date key, and add the month and day together. So, if the date is displayed as "0704", the result is "11".

Trust the Germans to add maths to operating you car, you would swear they have ''IQ Level Asian'' IQ's... (No offence Max :) )
 

Nic_s

///Member
I have this in PDF somewhere at home. I recall it saying something about it's for use by technicians. Will upload.
 
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