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Thread: MK4 MFD - adjust fuel economy displayed

  1. #1
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    MK4 MFD - adjust fuel economy displayed

    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. #2
    Benevolent Dictator Uwe's Avatar
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    I think might be. Please post an Auto-Scan so we can see exactly what cluster you've got.

    -Uwe-
    The engineering problems are likely insurmountable. It would be like proposing to land a rocket booster section on a barge floating in the middle of the ocean.

  3. #3
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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
    www.Ross-Tech.com
    
    
    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 Tőrsteuer.FS KLO 0202  
    
       Subsystem 2 - Part No: 1C1959802A
       Component: 1H Tőrsteuer.BF KLO 0002  
    
       Subsystem 3 - Part No: 1C0959811A
       Component: 8C Tőrsteuer.HL KLO 0202  
    
       Subsystem 4 - Part No: 1C0959812A
       Component: 8C Tőrsteuer.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)--------------------------
    Last edited by Uwe; 08-30-2019 at 08:47 PM. Reason: CODE tags

  4. #4
    Benevolent Dictator Uwe's Avatar
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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-
    The engineering problems are likely insurmountable. It would be like proposing to land a rocket booster section on a barge floating in the middle of the ocean.

  5. #5
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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. #6
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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
    Golf VII, 1.6TDI BM Ed. 40 - 110 PK

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  8. #7
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    Quote Originally Posted by Mari View Post
    (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-
    The engineering problems are likely insurmountable. It would be like proposing to land a rocket booster section on a barge floating in the middle of the ocean.

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  10. #8
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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.

  11. #9
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    Quote Originally Posted by Mari View Post
    (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.

  12. #10
    Benevolent Dictator Uwe's Avatar
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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-
    The engineering problems are likely insurmountable. It would be like proposing to land a rocket booster section on a barge floating in the middle of the ocean.

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