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Thread: Seat 1.2 CFWA 16244 - Sensor Reference Voltage A

  1. #11
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    Quote Originally Posted by MartinsX View Post
    Does the voltage at g79 connector pin 2 remains 1,4V with G79 disconnected? Was the T60 disconnected during measurements at APP sensors?
    Yes, when G79 connected. it is 1.2v, and disconnected 1.3v.
    Make no different if T60 is connected or not.

  2. #12
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    I have no wiring diagram of Your engine at front of me at the moment. If we assume that You did all measurements at correct pins, the only conclusion here is - ECU is faulty...
    Last chance - have You measured resistance between ground and wire from T94/15 to G79 pin2 (both ends disconnected)?

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  4. #13
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    /\ /\ /\ /\Martin can hang out at my clubhouse anytime!

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  6. #14
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    Quote Originally Posted by Souriau View Post
    Is this a common problem of this Delphi ECU?
    I have no personal experience with this exact ECU being faulty.
    Have seen some similar faults in 1,6 TDI CR (CAYA/CAYB/CAYC). Sometimes ECU, more often APP sensors.

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  8. #15
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    Quote Originally Posted by MartinsX View Post
    I have no wiring diagram of Your engine at front of me at the moment. If we assume that You did all measurements at correct pins, the only conclusion here is - ECU is faulty...
    Last chance - have You measured resistance between ground and wire from T94/15 to G79 pin2 (both ends disconnected)?
    Yes, I measured resistance of all 6 terminals of the G79 & G185 against battery-ve, both side disconnected from ECU and accelerator pedal.
    Infinity readings on all 6 pins of the Accelerator pedal.

  9. #16
    NostraJackAss Jack@European_Parts's Avatar
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    Did you know you could create a bench harness and check ecu isolated for 5 volt output, if it exists remove one pin at a time in car on that side plug & while clearing codes until it changes DTC to cleared and that pin would then be the respective track in issue or anything shared?
    European Parts Emporium/Performance / Immobilizer Solutions EPE
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  11. #17
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    I took time to studying the WD and looked for all pins that need 5V.
    On T94/13, T94/14 & T94/15 supply 5v to the accelerator pedal track 1 & 2 and Particulate Pressure sensor.
    All were disconnected and fault code still remains. No DTC code for accelerator sensor being disconnected.
    I already checked the wiring and resistance between both ends and to chassis ground for G79 & G185
    G505 was disconnected and resistance checked between T94/14 and T3/1, good, 0.5ohm. Then checked for short to ground and found it was showing short.
    I checked wiring and found the wire was compressed behind the ABS module.
    Repaired the wiring and all is good now.
    16244 - Sensor Reference Voltage A is now cleared and gone.
    Everything is back online; the engine is now starting and running.
    Code:
    Monday,10,February,2020,16:23:06:46973
    VCDS -- Windows Based VAG/VAS Emulator Running on Windows 7 x86
    VCDS Version: 19.6.2.0  HEX-NET CB: 0.4508.4
    Data version: 20190930 DS308.0
    www.Ross-Tech.com
    
    Workshop Code: 000 18261 018261
    
    VIN: VSSZZZ6JZDR080216   License Plate: 
    
    
    Chassis Type: 6J-SE25 (6N0)
    Scan: 01 03 08 09 15 17 19 25 44 4B 56
    
    VIN: VSSZZZ6JZDR080216   Mileage: 171320km-106453miles
    
    01-Engine -- Status: OK 0000
    03-ABS Brakes -- Status: OK 0000
    08-Auto HVAC -- Status: OK 0000
    09-Cent. Elect. -- Status: OK 0000
    15-Airbags -- Status: OK 0000
    17-Instruments -- Status: OK 0000
    19-CAN Gateway -- Status: OK 0000
    25-Immobilizer -- Status: OK 0000
    44-Steering Assist -- Status: OK 0000
    4B-Multifunc. Module -- Status: OK 0000
    56-Radio -- Status: OK 0000
    -------------------------------------------------------------------------------
    Address 01: Engine (J0000-CFWA)       Labels:. 03P-906-021-CFW.clb
       Part No SW: 03P 906 021 BF    HW: 03P 906 021 BE
       Component: R3 1.2 DCM3.7 H09 3331  
       Revision: 11002001    Serial number:               
       Coding: 00114014000400080000
       Shop #: WSC 18261 000 18261
       ASAM Dataset: EV_ECM12TDI03103P906021BF 001005
       ROD: EV_ECM12TDI03103P906021AJ.rod
       VCID: ED9280E93C260327FC-80B8
    
    No fault code found.
    Readiness: 0010 1000
    
    -------------------------------------------------------------------------------
    Address 03: ABS Brakes (J104)       Labels: 6R0-907-37x-ABS82.clb
       Part No SW: 6R0 907 379 AD    HW: 6R0 907 379 AB
       Component: ABS8.2 front  H03 0001  
       Revision: --------    
       Coding: 100200DB007500B2082700E300D700000000
       Shop #: WSC 04941 000 00000
       VCID: 804CC95D17B4FE4F27-80D4
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 08: Auto HVAC        Labels: 6J0-820-045.clb
       Part No SW: 6J0 820 045 A    HW: 6J0 820 045 A
       Component: J301  Klimaanlage   0330  
       Revision: 00 26 08    Serial number: 0000002539108-
       Shop #: WSC 06402 785 00200
       VCID: A404A5CD676C026F63-80F0
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 09: Cent. Elect. (J519)       Labels:. 6R0-937-08x-09.clb
       Part No SW: 6R0 937 087 K    HW: 6R0 937 087 
       Component: BCM PQ25 H+4  H46 0254  
       Revision: BF046001    Serial number: 0434 185121587
       Coding: 24882BE888612500922008F02E0B0C800000422F60000400200000000000
       Shop #: WSC 64564 324 38760
       VCID: C5C218494C161B6754-8090
    
       Subsystem 1 - Part No SW: 6R0 959 802 M    HW: 6R0 959 802 M  Labels: 6R0-959-802.CLB
       Component: J386__TSG_FT  002 3110 
       Serial number: --------------------
       Coding: 030000
    
       Subsystem 2 - Part No SW: 6R0 959 801 P    HW: 6R0 959 801 P  Labels: 6R0-959-801.CLB
       Component: J387__TSG_BT  002 3110 
       Serial number: --------------------
       Coding: 020000
    
       Subsystem 3 - Part No: 1K8 951 171 A
       Component: DWA-Sensor 00  001 0103 
       Coding: 000000
    
       Subsystem 4 - Part No: 1K0 951 605 C
       Component: LIN BACKUP HO  H05 1501 
       Coding: 000000
    
       Subsystem 5 - Part No: 1K8 951 171 A
       Component: DWA-Sensor 00  001 0103 
       Coding: 000000
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 15: Airbags (J234)       Labels:| 5K0-959-655.clb
       Part No SW: 6R0 959 655 K    HW: 6R0 959 655 K
       Component: VW10AirbagA0D H10 0020  
       Revision: --------    Serial number: 003GX01ATHXD
       Coding: 003044
       Shop #: WSC 06401 785 00200
       ASAM Dataset: EV_AirbaVW10BPAVW250 A01001
       ROD: EV_AirbaVW10BPAVW250.rod
       VCID: CAD82B756D08F41FB9-809E
    
       Crash sensor for side airbag: driver side: 
       Serial number: 3495RRB401G4UIV8H145
    
       Crash sensor for side airbag: front passenger side: 
       Serial number: 3505RRB401I4UIV88HUW
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 17: Instruments (J285)       Labels:| 5K0-920-xxx-17.clb-SRI1
       Part No SW: 6J0 920 904 H    HW: 6J0 920 904 H
       Component: KOMBI         H04 0508  
       Serial number: 00000000000000
       Coding: 410200
       Shop #: WSC 131071 1023 2097151
       ASAM Dataset: EV_Kombi_UDS_VDD_RM09 A04114
       ROD: EV_Kombi_UDS_VDD_RM09_SK46.rod
       VCID: B02C599DEB94AECF97-80E4
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 19: CAN Gateway (J533)       Labels:. 6N0-909-901-6R.clb
       Part No SW: 6N0 909 901     HW: 6R0 937 087 
       Component: GW-K-CAN TP20 H46 0254  
       Revision: BF046001    
       Coding: 022300
       Shop #: WSC 64564 324 38760
       VCID: F0AC999D2314EECFD7-80A4
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 25: Immobilizer (J334)       Labels:| 5K0-920-xxx-25.clb
       Part No SW: 5K0 953 234     HW: 5K0 953 234 
       Component: IMMO          H04 0508  
       Serial number:               
       Coding: 000000
       Shop #: WSC 00000 000 00000
       ASAM Dataset: EV_Immo_UDS_VDD_RM09 A03009
       ROD: EV_Immo_UDS_VDD_RM09.rod
       VCID: EA988BF50DC8141F99-80BE
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 44: Steering Assist        Labels: 6Q0-423-156.clb
       Part No: 6R0 423 156 B
       Component: LenkhilfeTRW        V277  
       Coding: 10111
       Shop #: WSC 06403  
       VCID: AF2E5AE16AAAB1378E-80FA
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 4B: Multifunc. Module        Labels: 6J0-959-441.clb
       Part No: 6J0 959 441 
       Component: MF-Modul       0007 0001  
       Coding: 0000001
       Shop #: WSC 77005 000 00000
       VCID: F0AC999DE314EECFD7-80A4
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 56: Radio (J503)       Labels: None
       Part No SW: 6J2 035 153 H    HW: 6J2 035 153 H
       Component: Radio         H15 0302  
       Revision: R0000000    Serial number: SEZAZ2M4946003
       Coding: 0503020002
       Shop #: WSC 04941 000 00000
       VCID: AB164EF1CAB2CD17A2-80FE
    
    No fault code found.
    
    End----------(Elapsed Time: 01:17, VBatt start/end: 12.4V/12.4V)-----------

  12. #18
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    Hello

    Is this error code got wrong text message description of this fault code?

    16244 - Sensor Reference Voltage A
    P0641 00 [167] - Open Circuit

    As this fault was not open circuit but it was short circuit...

  13. #19
    NostraJackAss Jack@European_Parts's Avatar
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    I think at some point you are not done with this repair & after "wiggle work" all depends on how long the wire stays in place or before it corrodes, what?

    Did you know the VAG wire harness is made of straw and human feces and when feces gets in a VAG it creates an STD?

    Can you duplicate the condition to verify as per JPPSG?
    European Parts Emporium/Performance / Immobilizer Solutions EPE
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  14. #20
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    The problem is fixed.
    I am just asking was the DTC is having incorrect text description in the first place?
    Saying it is open circuit when in fact was short circuit.
    If it been open circuit on the G505, then it would not have killed the 5v supply to the G79.

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