MK4 MFD - adjust fuel economy displayed

   #1  

pkhoury

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I retrofitted an MFD instrument cluster in my 2004 Golf TDI (BEW). I wanted to see if it's possible to adjust what the fuel economy shows on my display, as it's off by about 1-2mpg. I know this is possible for the Mk5/Mk6 (and I've done it on my other TDIs), but I'm not sure if it's possible to do this on a Mk4. Google doesn't yield a lot of results on this, since I know the MFD wasn't an option here in the US for a Golf TDI.

Thanks.
 
   #2  

Uwe

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I think might be. Please post an Auto-Scan so we can see exactly what cluster you've got.

-Uwe-
 
   #3  

pkhoury

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Code:
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 7 x64
VCDS Version: 18.2.1.2 (x64)
Data version: 20180518 DS287.1
[url]www.Ross-Tech.com[/url]


VIN: 9BWGR21J244016339   License Plate: DSEL
Mileage: 479760km-298109mi   Repair Order: 



--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Chassis Type: 1J (1J - VW Golf/Bora IV (1998 > 2006))
Scan: 01 02 03 08 15 16 17 19 22 29 35 36 37 39 46 47 55 56 57 75
          76
 
VIN: 9BWGR21J244016339   Mileage: 479760km-298109miles
-------------------------------------------------------------------------------
Address 01: Engine        Labels: 038-906-016-BEW.lbl
   Part No SW: 038 997 016 R    HW: 028 101 114 6
   Component: R4 1,9L EDC G000SG  0282  
   Revision: 12345678    Serial number: VWZ7Z0C7100327
   Coding: 0150031
   Shop #: WSC 00002 512 00096
   VCID: 2D516209B789232CBC-5140

2 Faults Found:
17911 - Load Signal from Alternator Term. DF 
            P1503 - 000 - Implausible Signal
             Freeze Frame:
                    RPM: 1533 /min
                    Torque: 156.0 Nm
                    Speed: 24.0 km/h
                    Load: 48.6 %
                    Voltage: 14.29 V
                    Bin. Bits: 00101000
                    Load: 0.0 %
                    (no units): 0.0

16725 - Camshaft Position Sensor (G40) 
            P0341 - 000 - Implausible Signal - Intermittent
             Freeze Frame:
                    RPM: 2814 /min
                    Torque: 188.0 Nm
                    Speed: 129.0 km/h
                    Load: 52.2 %
                    Voltage: 14.06 V
                    Bin. Bits: 00101000
                    Idle Stabilization: 0.0°KW
                    (no units): 48.0

Readiness: 0 0 0 0 0 

-------------------------------------------------------------------------------
Address 03: ABS Brakes        Labels: 1C0-907-37x-ABS.lbl
   Part No: 1C0 907 379 L
   Component: ABS FRONT MK60      0101  
   Coding: 0004097
   Shop #: WSC 00000 785 00200
   VCID: 3365747151AD75DCEA-5140

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags        Labels: 6Q0-909-605-VW5.lbl
   Part No: 1C0 909 605 A
   Component: 1M AIRBAG VW51 02   0008  
   Coding: 12621
   Shop #: WSC 00000  
   VCID: 224B8135AE57EC5411-5122

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments        Labels: 1J0-920-xx5-17.lbl
   Part No: 1J0 920 926 C
   Component: KOMBI+WEGFAHRSP VDO V13  
   Coding: 05234
   Shop #: WSC 00396  
   VCID: 2A5B6915D667341459-5122
   9BWGR21J244016339     VWZ7Z0C7100327

2 Faults Found:
01336 - Company Data Bus for Comfort System 
            80-10 - Single-Wire Operation - Intermittent
01304 - Radio 
            49-00 - No Communications

-------------------------------------------------------------------------------
Address 19: CAN Gateway        Labels: 6N0-909-901-19.lbl
   Part No: 6N0 909 901 
   Component: Gateway K<->CAN    0001  
   Coding: 00006
   Shop #: WSC 00028  
   VCID: 70EFBB7D303B0EC4D7-5122

3 Faults Found:
01336 - Company Data Bus for Comfort System 
            80-10 - Single-Wire Operation - Intermittent
01304 - Radio 
            49-00 - No Communications
01332 - Door Control Module; Passenger Side (J387) 
            49-10 - No Communications - Intermittent

-------------------------------------------------------------------------------
Address 46: Central Conv.        Labels: 1C0-959-799.lbl
   Part No: 1C0 959 799 C
   Component: 8C Komfortgerát HLO 0003  
   Coding: 00259
   Shop #: WSC 00000  
   VCID: 377D406115D599FCD6-4AE8

   Subsystem 1 - Part No: 1C1959801A
   Component: 8C Tõrsteuer.FS KLO 0202  

   Subsystem 2 - Part No: 1C1959802A
   Component: 1H Tõrsteuer.BF KLO 0002  

   Subsystem 3 - Part No: 1C0959811A
   Component: 8C Tõrsteuer.HL KLO 0202  

   Subsystem 4 - Part No: 1C0959812A
   Component: 8C Tõrsteuer.HR KLO 0202  

2 Faults Found:
01332 - Door Control Module; Passenger Side (J387) 
            49-10 - No Communications - Intermittent
01359 - Internal Central Locking Switch; Passenger Side (E198) 
            27-10 - Implausible Signal - Intermittent

End-------------------------(Elapsed Time: 05:12)--------------------------
 
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   #4  

Uwe

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Adaptation Channel 3. It likely has 100 in it. You should be able to change it to some value between 85 and 115.

Let's say you're getting an actual 40 but the cluster is indicating 42 mpg. That would be a 5% difference, so I'd try 105 as the New Value in that channel.

-Uwe-
 
   #5  

pkhoury

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I'm not good with math, so I gotta think this through. So if the MFD reports say 40 and I'm getting 41-41.5, would I do 95 instead? I keep logs in Excel, and I'm finding that it's about 1-1.5mpg off. Oddly, when towing, fuel economy is more accurate, but still slightly off.
 
   #6  

Mari

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(MFD value/Real value)x100

(40/41)x100 = 97
(40/41.5)x100 = 96

I use an App called SpritMonitor... in the last 17.396 miles I did 58.8 MPG, MFD tells me another story...

Don't worry too much over fuel consumption report on MFD, worry about faultcodes in scan ;)
 
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   #7  

Uwe

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(MFD value/Real value)x100
Yes, but that's in consumption (Liters / 100km). But if you're in the US and the MFD displays Miles / Gallon, then you have to flip the equation.

-Uwe-
 
   #8  

pkhoury

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Bad news. Channel 3 is not available. Is that the only way it could be changed? It's a pull down option in adaptation, but it says it's not available when I select it, or choose that channel manually.
 
   #9  

pkhoury

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(MFD value/Real value)x100

(40/41)x100 = 97
(40/41.5)x100 = 96

I use an App called SpritMonitor... in the last 17.396 miles I did 58.8 MPG, MFD tells me another story...

Don't worry too much over fuel consumption report on MFD, worry about faultcodes in scan ;)
Regarding fault codes in the scan:

I cheated, and that was an old scan from 2018, but I haven't changed any hardware since then. I haven't used the car since May until recently, because I had a boost leak and an exhaust manifold leak (both since corrected). But I just thought to get the MFD issue fixed, as I had a pickup truck bed cover smack my 2010 JSW TDI, so this is now my primary car in the meantime. Which is fine; I love my Mk4 Golf!

Also, there were at least 2 codes concerning the databus - I'm not using a VW OEM radio (because they suck, and mine didn't work anyways). The only persistent code is the alternator DF code, but the car still works otherwise. I've had that since I bought the car.
 
   #10  

Uwe

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If channel 3 is not available in your particular cluster then I'm not aware of any way to change this.

-Uwe-
 
   #11  

pkhoury

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Well, it was worth a shot trying to check anyways. Thanks for your help, Uwe.
 
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