OBC Diagnostics

[Roverjoe]

Do not know if copying other peoples info is allow if not mods please delete.
To enable the OBC diagnostics:

a) Press and hold the trip reset button.
b) Put key into ignition switch and turn to KLR (Ignition switch
position #1)
c) Your LCD display will show something like this "test 1.-"
d) Press the reset button till you get to "test 19.-". (19.0 unlocks all
the features)
e) Wait for display to show "Log I -off" and press the reset button
f) With no delay press Trip Reset several times to select one of the
following functions:

1 Car, Engine and cluster data

1.0 VIN serial number
1.1 K-number
1.2 Cluster Part #
1.3 Coding (04)/diagnosis (52)/bus index (10)
1.4 1200 Week (12)/year of manufacture (2000) (not of the car this is either the date te software was uploaded to the dash of the dash was made by who ever made them)
1.5 09_160 Hardware (09) and software # (16.0) of cluster
1.6 Injection Status-number of cylinders-motor number

2.0 2 Cluster System Test - Activates the gauge drivers, indicators and
LEDs to confirm function

3 Service Inspection (SI) Data
3.0 Used fuel in liters since last SI
3.1 Periodic inspection days; elapsed days (since last SI)

4 Momentary Consumption
4.0 Instant fuel consumption - 0145=14.5 liters/100km
4.1 Instant fuel consumption - 0018=1.8 l/Hour

5 Distance Gone Consumption
5.0 Average mileage; 082=8.2 liters/100km
5.1 Calc. km to refuel (momentary distance to go)

6 Fuel Level sensor inputs in liters
6.0 Fuel level averaged; 109330 - Left half sensor input=10.9 liters;
Right sensor input=33.0 liters
6.1 Total tank level averaged; 0439 - vlgs 6.0: 10.9+33.0=43.9 liters
6.2 Indicated value and diagnostics:
last digit: 1 - both sensors ok; 2 - sensor error; 3 - signal error
- no display

7 Temperature and Speed
7.0 021+ Coolant/Engine temperature (2.1C)
7.1 130 Ambient/Outside temperature - chg met 5 pts. 125/130/135
7.2 Engine speed / Current RPMs 1/min
7.3 Vehicle speed / Current Speed in km/hour

8 Values of 7.0 bis 7.3 in HEX form

9 Battery
9.0 140 Battery Voltage - 140 = UB 14.0v

10.0 Country code

11.0 Unit code

12.0 Not used

13.0 Gong test

14.0-14.4 Error memory: if 000000 no error in memory (this is not the fault codes on the ecu these can only be accessed voa the diag socket and these codes can be ignored

15.0 - 18.0 not used

19 Lock Status; unlocks functions in range 3-18
19.0 L-On/L-Off Unlock: press button when "L-Off"

20.0 Correction Factor for OBC Fuel Consumption
Formula for the Correction Factor:
Indicated Consumption X 1000 / Measured Consumption = Factor (4321)
Press Reset button to begin setting the of the first (1) digit - press
reset when the right digit appears
20.1 Setting of the second (2) digit
20.2 Setting of the hundred (3) and thousand (4) digit
20.3 Store and Display the Correction Factor

[b]21.0 Software Reset; reset OBC settings

[bish1980]

hello if you dont mind me asking, what is all this information about, as my car will be going to the garage tomorrow to go on a diagnostic machine to find out why my speedo dont work or gets stuck, handbrake light sometimes is conyinually illuminated and why the message centre sometimes dont work or freezes and the heter keeps going all funny

regards

marc

[Roverjoe]

Its to test certain functions on your on board computer and reset if required.

As explained to me the message center.

Spent a while looking for how to reset my OBC and test certain functions.

Might help you with the reset of the OBC.

[T-Cut]

Originally Posted by Roverjoe

Do not know if copying other peoples info is allow if not mods please delete.

The stuff you copied is quite old and contains several errors. I've been updating it recently as information feeds back. Here's the latest edition:

All models, with or without the High Line/Onboard Computer, will display diagnostic mode on the lower screen.


To enable the on-board diagnostics:

a) Put key into ignition and turn it to position 1 (instruments activated).
a2) If you intend driving with diagnostic mode active, start the engine now.
b) Press and hold the trip reset button. This is the button sticking out near the speedometer.
c) Your LCD display will show "test 1.-"
d) Immediately press the reset button every half second until you get to "test 19.-". (19.0 allows access to diagnostic mode)
e) The display will now show alternating "Log 1 -on" / "Log 1 -off"
f) While it shows "Log 1 -off" press the reset button and. .
g) With no delay press within a half second (repeatedly if necessary) to get to the required section.
h) The screen will appear similar to the earlier one, but is a different series. Keep pressing every half second to select one of the following functions (there is no title on screen):

1 Car, Engine and cluster data
1.0 VIN serial number
1.1 K-number
1.2 Cluster Part Number
1.3 Coding (04)/diagnosis (52)/bus index (10)
1.4 Week of manufacture (eg. 1200 = week 12)/year of manufacture (eg. 2000)
1.5 Hardware number (eg. 09) and Software number (eg. 11600 = 16.0) of IPK.
1.6 Injection Status-number of cylinders-motor number

2 Cluster System Test
2.0 Activates the gauge drivers, indicators and LEDs to confirm function.
When function 2.0 is selected, the instrument pack provides a check of the warning lamps, major and minor gauges, displays and illumination functions. The gauge pointers are driven through their full arc and back again to check operation. All warning lamps are illuminated to check that none of the LEDs have failed. All yellow and red pixels of the message centre are flashed on and off in a chequered pattern to check that all elements of the display are functional.

3 Service Inspection (SI) Data
3.0 Fuel Used (in liters) since last Service Inspection
3.1 Periodic inspection days; elapsed days (since last SI)

4 Momentary Consumption
4.0 Momentary fuel consumption in litres/100km (eg. 0145 = 14.5 litres/100km)
4.1 Momentary fuel consumption in litres/hour (eg. 0018 = 1.8 l/hr)

5 Distance Gone Consumption
5.0 Average consumption in litres/100km (eg. 082 = 8.2 litres/100km)
5.1 Calculate distance ( km) to refuel (momentary distance to go)

6 Fuel level sensor outputs in litres (Fuel tank has left and right side sensors)
6.0 Fuel levels both (eg: 109330 means left half sensor = 10.9 litres; right half sensor = 33.0 litres)
6.1 Total tank level (eg: 0439 is 10.9+33.0 = 43.9 litres)
6.2 Indicated value with diagnostics: The Test Number (6.2) is preceded by 1, 2 or 3 (eg. 1-6.2 or 2-6.2 or 3-6.2)
If first digit is 1 - both sensors are OK. This is followed by three left signal digits, then three right signal digits.
If first digit is 2 - one sensor has an error. Side in error will display - - 0 . Functional side will show its three digits
If first digit is 3 - no sensor signal, no display. Probably - - 0 - - 0 (Needs confirming -TC)

7 Temperature and Speed
7.0 Coolant/Engine temperature - changes every whole degree Centigrade. (eg: 021+ is 21°C)
7.1 Ambient/Outside temperature - changes every 0.5 degree Centigrade. (eg.125/130/135 is 12.5°/13.0°/13.5°C)
7.2 Engine speed / Current (RPM)
7.3 Vehicle speed / Current Speed (km/hour)

8 Values of 7.0 to 7.3 in HEX form (Unknown)

9 Battery
9.0 Battery Voltage (eg: 137 = 13.7v)

10.0 Country code

11.0 Unit code

12.0 Not used

13.0 Gong test
This tests the lights on gong which chimes when you open the door. The same gong is used in the speed limit warning for models with the trip computer.

14.0-14.4 Error memory: if 000000 no error in memory

15.0 - 18.0 not used

19 Lock Status: unlocks functions in range 1-18 and 20.
19.0 Log1-On/Log1-Off Locks/Unlocks diagnostic regime: To access, press button when Log1-Off shows

20 Correction Factor for OBC Fuel Consumption display
20.0 The Factor is displayed numerically in the form ABCD (Thousands/hundreds/tens/units)
The formula for the Factor = Indicated Consumption x 1000 / Measured Consumption

The indicated consumption should be established by running the system for several hundred miles, preferably a thousand or so without resetting the OBC at any stage. The longer you allow the un-reset system to operate, the more 'accurate' is the indicated consumption. Determine the measured consumption using brim to brim calculations over a similar period.
Now calculate your more accurate factor using the formula above. These digits are what you insert for ABCD.

Press the button to show 20.1 which allows the units (D) to be set.
The display counts down from the current figure and cycles until you press at the required one.
This sets it and the display will advance to 20.2

20.2 This allows the 'tens' (C) to be set as above. When you press the set button, the display advances to 20.3

20.3 This sets the 'hundreds' (B) and then the 'thousands' (A). Each digit is set in succession by a single press.
After setting (A), the display advances to the next function (21.0)

21.0 Software Reset
Resets OBC settings. Do not press this.

You may now drive the car with the selected display showing for the duration of the journey.
Turn off the ignition to exit Diagnostic Mode.



More on the Section 20 Correction Factor for OBC Consumption Display

Let's say that the display currently says you get 10km/l fuel consumption. However, you know from your brim to brim tests that it's somewhat lower than this. Let's say that every tank full of petrol (64.8 litres, or whatever you find it to be) allows you to travel 500km.

So the Measured Consumption is 500/64.8 = 7.72 km/l

You computer is saying it's 10 ml/l so that's the Indicated Consumption.

The Correction Factor (using a calculator) is:

Indicated x 1000 / Measured
= 10 x 1000 / 7.72
= 1295 (forget any decimals)

So you replace the existing Factor with this one.
Go to test 20 and you'll see the existing Factor ('ABCD').
Change D to 5
Change C to 9
Change B to 2
Change A to 1 (if necessary) by following the routine described in the instructions.

If your display is in MPG, just use gallons and miles instead of litres and kilometres.

Now when you use the trip computer to display your fuel consumption, it will be much nearer the truth. Note that you must allow the computer to run a good while (1000km or 500 miles or so) without resetting it to get a meaningful result.

My quick Find Marker for this post is IPKDM

TC

[bish1980]

so is this the information that the garage will be looking at tomorrow to find what might be causing the faults i have with the speedo, plugs, handbrake light always being on and the heating unit acting all funny?????

[stevemac]

Originally Posted by bish1980

so is this the information that the garage will be looking at tomorrow to find what might be causing the faults i have with the speedo, plugs, handbrake light always being on and the heating unit acting all funny?????

If you are being plugged into a T4 then the diagnostics will be more comprehensive that the above. It would also be worth looking at this thread http://www.the75andztclub.co.uk/foru...2&postcount=21 and activating or de-activating various options listed. If it's not a T4 then I am not sure the diagnosis will really be of much use. I am sure T-Cut will correct me if I am wrong

[T-Cut]

Only a T4 or the odd later diagnostic system can interpret the codes correctly. Most of these are bespoke MGR codes. The most commonly used readers won't interpret them correctly.

[stevemac]

Originally Posted by T-Cut

Only a T4 or the odd later diagnostic system can interpret the codes correctly. Most of these are bespoke MGR codes. The most commonly used readers won't interpret them correctly.

Thought as much

[bish1980]

ive just had the diagnostics done, for the resulys please look at my post headed, what are these codes MGZT 2001 2.5V6

THANKS